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Superior UPVC Underground Drainage & Sewerage Systems.
Prayag India’s Underground Drainage (UGD) system is meticulously designed to provide a high-performance, maintenance-free solution for the disposal of sewage and surface water. Unlike traditional cement or cast-iron pipes that are prone to cracking and corrosion, Prayag uPVC UGD pipes are built to withstand the test of time and underground pressure.
Non-reactive with acidic or alkaline substances, keeping the system completely immune to underground chemical erosion — even under aggressive effluent and soil conditions.
Engineered to withstand extreme underground pressure without cracking, unlike traditional cement or cast-iron pipes that fracture under soil movement and load.
A mirror-smooth inner surface keeps friction low, preventing scale buildup and blockages — so wastewater flows freely, even on flatter gradients.
Manufactured as Pb (lead-free), ensuring zero hazardous leaching into the surrounding soil and groundwater — a critical requirement for green-certified developments (LEED/IGBC).
Designed for long-term, maintenance-free performance, significantly cutting down replacement and upkeep costs over the life of the system.
Lightweight uPVC construction means no heavy machinery or welding is required — reducing transport, handling, and labour costs on site.
Available in Standard (SN-4) and Heavy-Duty (SN-8) stiffness classes, so the right pipe can be specified for everything from residential drainage to highways, airports, and municipal infrastructure.
uPVC (unplasticized PVC) is a rigid, chemically inert polymer that doesn't rust, corrode, or react with acidic or alkaline soil conditions — unlike cement or cast iron. Its smooth interior resists scale buildup, while its non-porous structure blocks seepage and chemical erosion entirely.
Prayag UGD pipes are built on this material advantage: lead-free, corrosion-proof, and engineered for a 25-year service life — ensuring the safe, hygienic transport of wastewater while protecting soil and building foundations from contamination.
Residential & Urban Drainage: Apartments, townships, and individual bungalows.
Commercial Complexes: Shopping malls, hospitals, and office buildings.
Industrial Sewerage: Chemical effluent transport and factory drainage.
Municipal Projects: Public sewer networks and stormwater management.
Infrastructure: Drainage for highways, airports, and sports complexes.
A product range that continues to set the bar higher.
Prayag UGD Pipes and Fittings form an underground drainage and sewerage system for disposing of sewage and surface water. The system is designed for residential, commercial, industrial, municipal, and infrastructure projects that require durable underground wastewater or stormwater transport.
The pipes are manufactured from rigid uPVC, or unplasticized polyvinyl chloride. Unlike materials that may rust, corrode, or crack, uPVC pipes are chemically inert, non-porous, lightweight, and designed to withstand demanding underground conditions.
Applications include residential and urban drainage for apartments, townships, and bungalows; commercial drainage for malls, hospitals, and offices; industrial sewerage and factory drainage; municipal sewers and stormwater systems; and drainage for highways, airports, and sports complexes.
Yes. Prayag states that the uPVC material is non-reactive with acidic and alkaline substances. Its corrosion and chemical resistance helps protect the drainage system against aggressive effluent, soil conditions, rust, and underground chemical erosion.
Prayag UGD pipes are engineered for structural strength under underground pressure, soil movement, and external loads. The appropriate stiffness class and installation method must be selected for the site conditions, burial depth, traffic load, and intended application.
The mirror-smooth inner surface keeps friction low and helps wastewater flow efficiently, including on flatter gradients. It also helps resist scale buildup and blockages, supporting consistent hydraulic performance throughout the underground drainage network.
Prayag states that its UGD pipes are manufactured as lead-free products. The non-porous system is designed to prevent hazardous leaching and seepage into the surrounding soil and groundwater while supporting hygienic wastewater transport.
Prayag describes the system as designed for a service life of up to 25 years. Actual performance depends on correct product selection, trench preparation, jointing, bedding, loading conditions, installation quality, use, and maintenance throughout the drainage system's life.
SN-4 is the standard stiffness class, while SN-8 is the heavy-duty class. Prayag positions these options for different loads, ranging from residential drainage to highways, airports, municipal infrastructure, and other sites exposed to demanding underground conditions.
The SN-8 Heavy Duty range is listed from 110 mm to 315 mm, with wall thicknesses from 3.2 mm to 10.4 mm. The SN-4 Standard range is listed from 110 mm to 200 mm. The correct pipe size should follow the required flow capacity and project design.
Selfit uses solvent cement to connect compatible UGD pipes and fittings. Prayag lists Selfit sizes of 110 mm, 160 mm, and 200 mm, with fittings including couplers, tees, 90-degree elbows, and end caps.
Ringfit uses a rubber-ring connection to form the pipe joint. Prayag lists 110 mm and 160 mm sizes, along with a 110 by 160 mm reducer. The range includes couplers, bends, tees, reducer fittings, cross tees, single-Y fittings, and pipe clips.
Available fittings vary by jointing system and include couplers, reducer couplers, 45-degree and 87.5-degree bends, tees, reducer tees, cross tees, single-Y fittings, 90-degree elbows, end caps, and pipe clips. Use only components compatible with the selected pipe and joint type.
The lightweight uPVC construction reduces handling and transport demands compared with heavier traditional pipe materials. Prayag states that the system does not require heavy machinery or welding, supporting faster and more cost-effective installation when trenching, bedding, alignment, and jointing are completed correctly.
Selection should account for wastewater type, required flow, pipe diameter, burial depth, soil conditions, external loads, route, stiffness class, and the preferred Selfit or Ringfit joint. A qualified plumbing professional should confirm the pipe class, fittings, trench design, jointing method, and installation requirements for the project.
