Global Drain Waste Vent System Market Insights, Size, and Forecast By Application (Residential, Commercial, Industrial, Municipal), By Component Type (Pipes, Fittings, Valves, Manholes), By Material (PVC, Cast Iron, Copper, Stainless Steel), By System Type (Gravity Systems, Vacuum Systems, Pressure Systems), By Region (North America, Europe, Asia-Pacific, Latin America, Middle East and Africa), Key Companies, Competitive Analysis, Trends, and Projections for 2026-2035
Key Market Insights
Global Drain Waste Vent System Market is projected to grow from USD 21.8 Billion in 2025 to USD 32.5 Billion by 2035, reflecting a compound annual growth rate of 6.2% from 2026 through 2035. This essential market encompasses the intricate network of pipes and fittings designed to safely remove wastewater and sewage from buildings while allowing fresh air into the system to prevent siphonage and backflow. The market is primarily driven by rapid urbanization and infrastructure development, particularly in emerging economies, leading to increased construction activities across residential, commercial, and industrial sectors. Additionally, stringent regulatory standards pertaining to sanitation, hygiene, and environmental protection globally are mandating the adoption of high-quality and efficient DWV systems. Growing awareness among consumers and builders regarding the importance of effective waste management and indoor air quality further fuels market expansion. The Residential segment holds the largest share, reflecting the extensive use of DWV systems in homes and multi-family dwellings, directly correlated with population growth and housing demand.
Global Drain Waste Vent System Market Value (USD Billion) Analysis, 2025-2035
2025 - 2035
www.makdatainsights.com
A significant trend shaping the DWV system market is the increasing adoption of sustainable and smart plumbing solutions. This includes the integration of advanced materials like PEX and CPVC, which offer enhanced durability, corrosion resistance, and ease of installation compared to traditional materials such as cast iron and PVC. Furthermore, the development of smart DWV systems incorporating sensors for leak detection, flow monitoring, and predictive maintenance is gaining traction, promising improved efficiency and reduced water wastage. However, the market faces restraints such as the volatility in raw material prices, which can impact manufacturing costs and product pricing. The high initial installation costs associated with complex DWV systems and the need for skilled labor also pose challenges, particularly in developing regions. Despite these hurdles, significant opportunities lie in the retrofitting of aging infrastructure in developed nations and the expansion into green building projects, where demand for energy-efficient and environmentally friendly DWV solutions is paramount.
Asia Pacific stands out as the dominant and fastest growing region in the global DWV system market. This growth is attributable to massive investments in urban development, a booming construction industry, and supportive government initiatives for affordable housing and sanitation infrastructure across countries like China, India, and Southeast Asian nations. The region’s rapid industrialization and commercial expansion also contribute significantly to the demand for advanced DWV systems. Key players such as Honeywell, Fernco, Wavin, Siemens, Geberit, APOLLO Valves, Viega, Mueller Industries, Charlotte Pipe and Foundry, and Zoeller Pump Company are actively engaged in the market. These companies are focusing on strategies like product innovation, strategic partnerships, and mergers and acquisitions to strengthen their market position, expand their geographical reach, and cater to the evolving demands of various application segments, including those related to sustainable and smart building technologies. They are also investing in research and development to introduce more efficient, durable, and cost-effective DWV solutions.
Quick Stats
Market Size (2025):
USD 21.8 BillionProjected Market Size (2035):
USD 32.5 BillionLeading Segment:
Residential (45.8% Share)Dominant Region (2025):
Asia Pacific (41.2% Share)CAGR (2026-2035):
6.2%
What is Drain Waste Vent System?
The Drain Waste Vent system is a critical plumbing network managing wastewater. It comprises drainpipes carrying used water and solids away by gravity. Waste pipes handle gray water, while soil pipes transport blackwater. Integral to the system are vent pipes, which equalize atmospheric pressure within the drainage system. These vents prevent water traps from siphoning dry or backpressure from pushing sewer gases into living spaces. The system ensures safe and hygienic removal of all wastewater from a building to a sewer or septic tank, maintaining proper sanitation and preventing hazardous gas accumulation.
What are the Trends in Global Drain Waste Vent System Market
Smart Drains IoT Monitoring Systems
Modular Prefabricated DWV Solutions
Sustainable Water Reuse Integration
Advanced Polymer Pipe Innovations
AI Powered Predictive Maintenance
Smart Drains IoT Monitoring Systems
Smart Drains IoT Monitoring Systems represent a significant advancement in global drain waste vent management. This trend emphasizes integrating internet of things technology into drainage infrastructure for enhanced operational efficiency and preventative maintenance. Sensors embedded within pipes continuously monitor crucial parameters such as water flow, levels, temperature and the presence of blockages or leaks. This real time data is transmitted wirelessly to centralized platforms providing facility managers and homeowners with immediate insights into the system's health. The proactive detection of potential issues like impending clogs or pipe degradation allows for timely intervention reducing emergency repairs and minimizing disruption. This shift towards predictive maintenance and remote monitoring optimizes system performance extends asset lifespan and improves overall waste management safety and hygiene.
Modular Prefabricated DWV Solutions
Modular prefabricated DWV solutions represent a growing trend in the global drain waste vent system market, driven by significant installation efficiencies and improved quality control. This approach involves manufacturing interconnected DWV pipe sections offsite in controlled factory environments. These pre assembled modules, often incorporating fittings and hangers, are then transported to construction sites for rapid integration into buildings.
The trend addresses traditional onsite challenges such as skilled labor shortages and varying workmanship. Factory production ensures consistent quality, precise alignment, and reduces material waste. Furthermore, it significantly accelerates project timelines by allowing parallel work streams for construction and DWV fabrication. This method minimizes onsite cutting, fitting, and solvent welding, leading to cleaner, safer, and faster installations compared to conventional stick built methods. It also offers enhanced predictability in project scheduling and cost management.
What are the Key Drivers Shaping the Global Drain Waste Vent System Market
Rapid Urbanization and Infrastructure Development
Stringent Building Codes and Environmental Regulations
Growing Demand for Sustainable and Efficient Plumbing Systems
Technological Advancements in DWV Materials and Smart Solutions
Increasing Awareness of Hygiene and Sanitation Standards
Rapid Urbanization and Infrastructure Development
Rapid urbanization worldwide is a primary catalyst for the global drain waste vent system market. As cities expand and populations grow, the demand for new residential, commercial, and industrial buildings surges. Each new construction project necessitates robust and efficient plumbing infrastructure to manage wastewater and ensure proper ventilation. This includes a complex network of pipes, fittings, and fixtures that make up the DWV system. Governments and private developers are investing heavily in urban development, creating extensive new districts and modernizing existing ones. This continuous expansion directly translates into a sustained high demand for DWV components and installation services across all regions. The need for hygienic and functional drainage systems is fundamental to modern urban living.
Stringent Building Codes and Environmental Regulations
Stringent building codes and environmental regulations significantly drive growth in the global drain waste vent system market by mandating higher performance and sustainability standards. These regulations compel developers and property owners to invest in advanced DWV systems that meet stricter requirements for material durability, leak prevention, and waste management. Specifically, a focus on water conservation and pollution control necessitates systems with improved flow efficiency, corrosion resistance, and the ability to handle diverse waste streams responsibly. Furthermore, regulations often dictate the use of certified materials and professional installation practices, enhancing demand for high quality, compliant DWV products and specialized services. This regulatory push elevates the overall quality and complexity of required DWV infrastructure.
Growing Demand for Sustainable and Efficient Plumbing Systems
Growing demand for sustainable and efficient plumbing systems is a significant driver in the Global Drain Waste Vent System Market. Consumers and regulations increasingly prioritize environmentally friendly building practices. This translates into a strong preference for DWV systems that minimize water usage, reduce energy consumption for wastewater treatment, and utilize materials with lower environmental impact. Innovations such as intelligent flow management, gray water recycling compatibility, and more durable, recyclable piping materials are gaining traction. Furthermore, the drive for efficiency extends to installation and long term maintenance, favoring systems that offer easier assembly and require less frequent repairs. These factors collectively push manufacturers to develop and promote advanced DWV solutions that meet these evolving ecological and operational demands, thereby fueling market expansion.
Global Drain Waste Vent System Market Restraints
Stringent Regulatory Compliance and Certification Requirements
The Global Drain Waste Vent System Market faces a significant restraint from stringent regulatory compliance and certification requirements. These mandates encompass a wide array of standards pertaining to materials, installation, performance, and environmental impact across diverse international jurisdictions. Manufacturers must invest heavily in research, development, and testing to ensure their products meet or exceed these often complex and varying specifications. This includes rigorous material certifications for fire resistance, chemical inertancy, and durability, as well as testing for flow rates, pressure tolerances, and leak prevention.
Furthermore, acquiring and maintaining the necessary certifications from recognized bodies adds substantial time and cost to product development cycles. Non-compliance can lead to hefty fines, product recalls, or even market exclusion, increasing operational risks and hindering market entry for new innovators. The continuous evolution of these regulations necessitates ongoing monitoring and adaptation, posing a constant challenge for companies operating in this critical infrastructure market.
High Initial Investment and Installation Costs
A significant hurdle in the global drain waste vent system market stems from the substantial initial capital required for new installations and system upgrades. This includes not only the cost of the raw materials like piping, fittings, and connectors, but also the specialized labor required for their precise installation and integration. Furthermore, the diverse building codes and regulations across different regions often necessitate specific, more expensive components or more complex installation procedures, further inflating costs. For smaller businesses or individual property owners, this considerable upfront outlay can be a major disincentive, leading them to defer or forgo investing in modern, efficient drain waste vent systems. This acts as a powerful barrier to market penetration and expansion.
Global Drain Waste Vent System Market Opportunities
Smart DWV Systems: Predictive Maintenance & Leak Detection
The opportunity in Smart DWV Systems for Predictive Maintenance and Leak Detection is substantial, transforming traditional plumbing into proactive asset management. These intelligent systems leverage integrated sensors and Internet of Things technology to continuously monitor pipe conditions, flow rates, and potential anomalies.
Predictive maintenance capabilities enable early identification of developing issues like blockages, corrosion, or pipe degradation before they escalate into major failures. This allows facility managers to schedule maintenance precisely when needed, minimizing downtime, extending infrastructure lifespan, and significantly reducing emergency repair costs.
Simultaneously, real time leak detection provides immediate alerts for water escape, preventing extensive property damage, mold growth, and substantial water waste. This critical feature offers significant insurance claim reductions and promotes environmental sustainability.
Driven by growing demands for building efficiency, reduced operational expenses, and resource conservation in rapidly urbanizing environments, smart DWV solutions represent a vital advancement for global markets seeking resilient infrastructure.
Sustainable & Modular DWV Solutions for Green Building Initiatives
The global drain waste vent system market presents a significant opportunity in providing sustainable and modular solutions tailored for green building initiatives. As environmental regulations tighten and demand for eco friendly construction rises worldwide, particularly in rapidly urbanizing regions like Asia Pacific, there is a clear preference for innovative DWV systems.
Sustainable solutions leverage recycled or responsibly sourced materials, minimize water usage, and enhance system longevity, aligning perfectly with green building certifications like LEED or Green Mark. Modular DWV systems offer prefabricated components that reduce onsite waste, accelerate installation times, improve labor efficiency, and ensure consistent quality. This combination addresses critical green building objectives: minimizing environmental impact, optimizing resource use, and creating healthier indoor environments. Companies offering these advanced, high performance solutions can capture substantial market share by empowering developers to achieve their sustainability goals more efficiently and cost effectively. This trend represents a paradigm shift towards smarter, greener infrastructure development, offering a powerful competitive advantage.
Global Drain Waste Vent System Market Segmentation Analysis
Key Market Segments
By Application
- •Residential
- •Commercial
- •Industrial
- •Municipal
By Material
- •PVC
- •Cast Iron
- •Copper
- •Stainless Steel
By Component Type
- •Pipes
- •Fittings
- •Valves
- •Manholes
By System Type
- •Gravity Systems
- •Vacuum Systems
- •Pressure Systems
Segment Share By Application
Share, By Application, 2025 (%)
- Residential
- Commercial
- Industrial
- Municipal
www.makdatainsights.com
Why is the Residential application segment dominating the Global Drain Waste Vent System Market?
The Residential application segment commands the largest share due to continuous housing development and ongoing renovation projects worldwide. Each residential unit requires comprehensive DWV systems for sanitation and hygiene, leading to a consistently high demand for new installations and maintenance. Factors like population growth, urbanization, and evolving building codes further fuel this segment's robust expansion, making it the primary driver of the overall market.
How do material choices influence adoption across different application segments?
Material selection significantly impacts market dynamics, with PVC being a prevalent choice for its cost effectiveness, ease of installation, and corrosion resistance, particularly in residential and light commercial settings. Conversely, industrial applications often necessitate more durable materials like cast iron or stainless steel due to their superior strength, temperature resistance, and ability to handle corrosive waste streams. Copper is valued for specific applications requiring heat resistance or rigidity, showcasing how material properties align with varied operational demands.
What roles do different system types play in addressing varied drainage requirements?
Different system types cater to distinct operational needs. Gravity systems are the most common, relying on natural slope for waste flow and are widely used in residential and conventional commercial buildings. Vacuum systems offer flexibility in layout and are often preferred in specialized environments like marine vessels or remote locations where traditional gravity drainage is impractical. Pressure systems are employed when waste needs to be moved against gravity or over long distances, utilizing pumps to overcome elevation challenges, demonstrating specialized solutions for diverse infrastructural demands.
What Regulatory and Policy Factors Shape the Global Drain Waste Vent System Market
The global drain waste vent DWV system market operates within a complex web of evolving regional and international regulations. Building codes form the bedrock, with standards like the International Plumbing Code IPC and Uniform Plumbing Code UPC prevalent in North America, while Europe adheres to CEN standards and national building codes. These mandates dictate material specifications, installation practices, system design parameters, and performance criteria for health and safety.
Environmental policies increasingly influence material selection, promoting sustainable, lead free, and recyclable components to minimize ecological impact and ensure water quality. Product certification bodies, such as NSF International and IAPMO R&T, play a critical role, ensuring compliance with rigorous material and performance standards before market entry. Public health regulations globally emphasize efficient wastewater removal to prevent disease, driving innovation in sanitary fixture design and system efficiency. Local jurisdictions often add specific requirements, creating a fragmented yet consistently safety focused regulatory landscape. Adaptability to these diverse, constantly updated frameworks is crucial for manufacturers and installers.
What New Technologies are Shaping Global Drain Waste Vent System Market?
The Global Drain Waste Vent System Market is rapidly evolving through crucial innovations. Emerging technologies prioritize system intelligence, sustainability, and installation efficiency. Smart DWV systems are integrating Internet of Things IoT sensors for real time monitoring of flow rates, leak detection, and blockage identification, shifting maintenance from reactive to predictive. This enhances operational reliability and significantly reduces water damage.
New material science breakthroughs introduce advanced piping solutions. These include quieter sound dampening pipes and antimicrobial coatings preventing biofilm buildup, improving hygiene and indoor air quality. Prefabricated modular DWV components streamline installation processes, reducing labor costs and project timelines while ensuring consistent quality. Furthermore, increasing emphasis on circular economy principles drives demand for recyclable and durable materials. These advancements collectively promise more efficient, resilient, and environmentally conscious wastewater management infrastructure globally.
Global Drain Waste Vent System Market Regional Analysis
Global Drain Waste Vent System Market
Trends, by Region
Asia-Pacific Market
Revenue Share, 2025
www.makdatainsights.com
Dominant Region
Asia Pacific · 41.2% share
Asia Pacific unequivocally commands the global drain waste vent system market, holding a substantial 41.2% share. This dominant position is fueled by rapid urbanization and extensive infrastructure development across the region. Countries like China and India, experiencing massive construction booms in residential, commercial, and industrial sectors, are primary drivers. Strict building codes in many Asia Pacific nations also necessitate high quality and compliant DWV systems. Furthermore, increasing awareness regarding hygiene and sanitation standards contributes significantly to market expansion. The robust economic growth and continuous investment in new buildings and renovation projects cement Asia Pacific's leadership, indicating sustained high demand for drain waste vent solutions in the foreseeable future.
Fastest Growing Region
Asia Pacific · 7.9% CAGR
Asia Pacific is poised to be the fastest growing region in the Global Drain Waste Vent System Market, exhibiting a robust Compound Annual Growth Rate of 7.9% from 2026 to 2035. This accelerated expansion is primarily fueled by rapid urbanization and infrastructure development across emerging economies like China and India. Increasing construction activities in both residential and commercial sectors are driving demand for efficient DWV systems. Stringent building codes and growing awareness regarding sanitation and hygiene further contribute to market growth. Technological advancements in material science and innovative product offerings by regional manufacturers are also key factors propelling Asia Pacific's dominant growth trajectory during the forecast period.
Top Countries Overview
The U.S. is a major player in the global DWV market, driven by construction and plumbing renovations. Stringent local building codes and demand for efficient drainage systems further boost its market share. With a focus on sustainable and durable materials, the U.S. influences global trends. Manufacturers continually innovate to meet these evolving standards, making the U.S. a significant market leader and trendsetter.
China dominates the global drain, waste, and vent (DWV) system market, driven by rapid urbanization and infrastructure development. The country is a major producer and consumer of PVC, PPR, and PEX pipes and fittings. Domestic demand for sustainable and high-performance DWV solutions is rising, influencing global trends. Chinese manufacturers are expanding their international presence, offering competitive products across various material types and applications.
India's HVAC and construction boom fuels demand for advanced DWV systems. Local manufacturing and a growing focus on sustainable building practices are driving market expansion. The country is adopting global standards, while also innovating with solutions for unique infrastructure challenges. This growth positions India as a significant player and adopter of modern DWV technologies globally.
Impact of Geopolitical and Macroeconomic Factors
Geopolitical shifts impact the Drain Waste Vent (DWV) market through fluctuating construction demand and supply chain disruptions. Sanctions against key material producers or trade disputes can increase input costs for PVC, cast iron, and copper, essential for DWV systems. Furthermore, geopolitical instability in developing nations might deter foreign direct investment in infrastructure projects, slowing the adoption of modern DWV systems in favor of traditional alternatives. Political instability can also lead to currency devaluation, making imported components more expensive for local manufacturers.
Macroeconomic factors significantly influence the DWV market. Interest rate hikes can dampen new construction starts and renovation projects, directly reducing demand for DWV components. Inflationary pressures across energy and raw materials further elevate manufacturing costs. Housing market slowdowns due to economic uncertainty also contract the need for new installations. Conversely, robust economic growth, particularly in emerging economies, fuels infrastructure development and urbanization, driving significant demand for advanced and resilient DWV systems, especially those compliant with updated building codes focused on water conservation and sanitation.
Recent Developments
- March 2025
Honeywell launched its new 'SmartVent Pro' line of drain waste vent (DWV) systems. These systems integrate advanced sensor technology for real-time blockage detection and intelligent airflow management, aiming to reduce maintenance costs and improve system efficiency for commercial buildings.
- January 2025
Wavin announced a strategic partnership with Siemens to develop integrated digital solutions for building management systems that include DWV monitoring. This collaboration will focus on creating predictive maintenance algorithms and energy optimization features by leveraging data from Wavin's piping infrastructure.
- February 2025
Geberit completed the acquisition of a leading European manufacturer of pre-fabricated sanitary modules. This acquisition expands Geberit's offering in integrated bathroom solutions, streamlining installation processes and further consolidating its position in the modular construction segment of the DWV market.
- April 2025
Charlotte Pipe and Foundry introduced its new 'EnviroFlow' series of cast iron DWV pipes, featuring a significantly higher recycled content. This product launch addresses increasing demand for sustainable building materials and aligns with green building certifications, appealing to environmentally conscious developers.
- May 2025
Fernco partnered with several leading plumbing wholesale distributors across North America to expand its distribution network for its flexible couplings and connectors. This strategic initiative aims to increase market penetration and improve accessibility of Fernco's products for both residential and commercial DWV applications.
Key Players Analysis
Honeywell and Siemens are dominant with their smart building solutions integrating sensors and IoT for advanced drain waste vent DWV systems. Fernco excels in flexible couplings for repairs and new installations, while Wavin and Geberit offer comprehensive piping solutions including noise reduction technologies. APOLLO Valves, Viega, and Mueller Industries focus on high-quality valves and fittings, often leveraging press connect or advanced brazing for efficient, leak-proof systems. Charlotte Pipe and Foundry remains strong in traditional cast iron and plastic piping, while Zoeller Pump Company specializes in sump and effluent pumps vital for complete DWV functionality. Strategic initiatives across these players include expanding into prefabricated modular solutions, enhancing material science for corrosion resistance, and developing sustainable, water-efficient systems, all driving market growth through innovation and compliance with evolving building codes.
List of Key Companies:
- Honeywell
- Fernco
- Wavin
- Siemens
- Geberit
- APOLLO Valves
- Viega
- Mueller Industries
- Charlotte Pipe and Foundry
- Zoeller Pump Company
- Roth Industries
- Kitz Corporation
- Aliaxis
- NIBCO
- RectorSeal
Report Scope and Segmentation
| Report Component | Description |
|---|---|
| Market Size (2025) | USD 21.8 Billion |
| Forecast Value (2035) | USD 32.5 Billion |
| CAGR (2026-2035) | 6.2% |
| Base Year | 2025 |
| Historical Period | 2020-2025 |
| Forecast Period | 2026-2035 |
| Segments Covered |
|
| Regional Analysis |
|
Table of Contents:
List of Figures
List of Tables
Table 1: Global Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 2: Global Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 3: Global Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 4: Global Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 5: Global Drain Waste Vent System Market Revenue (USD billion) Forecast, by Region, 2020-2035
Table 6: North America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 7: North America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 8: North America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 9: North America Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 10: North America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Country, 2020-2035
Table 11: Europe Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 12: Europe Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 13: Europe Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 14: Europe Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 15: Europe Drain Waste Vent System Market Revenue (USD billion) Forecast, by Country/ Sub-region, 2020-2035
Table 16: Asia Pacific Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 17: Asia Pacific Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 18: Asia Pacific Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 19: Asia Pacific Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 20: Asia Pacific Drain Waste Vent System Market Revenue (USD billion) Forecast, by Country/ Sub-region, 2020-2035
Table 21: Latin America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 22: Latin America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 23: Latin America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 24: Latin America Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 25: Latin America Drain Waste Vent System Market Revenue (USD billion) Forecast, by Country/ Sub-region, 2020-2035
Table 26: Middle East & Africa Drain Waste Vent System Market Revenue (USD billion) Forecast, by Application, 2020-2035
Table 27: Middle East & Africa Drain Waste Vent System Market Revenue (USD billion) Forecast, by Material, 2020-2035
Table 28: Middle East & Africa Drain Waste Vent System Market Revenue (USD billion) Forecast, by Component Type, 2020-2035
Table 29: Middle East & Africa Drain Waste Vent System Market Revenue (USD billion) Forecast, by System Type, 2020-2035
Table 30: Middle East & Africa Drain Waste Vent System Market Revenue (USD billion) Forecast, by Country/ Sub-region, 2020-2035