Soil, waste and rainwater drainage system

SWR Drainage Pipes

Allwin Drain-Fit SWR Pipes are made for efficient soil, waste and rainwater disposal in residential, commercial and institutional buildings. The lightweight UPVC system supports fast installation, smooth flow and dependable drainage performance.

View Specs Usage Areas

Product TypeSWR Pipes

Available Sizes2 inch to 4 inch

StandardIS: 13592

Pipe GradeType A

Allwin SWR drainage pipe range — Drain-Fit SWR pipes for modern building drainage

About SWR Pipes

A clean and practical drainage solution for soil, waste and rainwater lines.

SWR pipes are used in drainage systems to carry soil discharge, wastewater and rainwater away from buildings. Allwin Drain-Fit SWR Pipes Type A are designed with a smooth inner surface to support better flow and reduce chances of scaling or blockage.

The system is suitable for vertical stacks, horizontal drainage branches, toilet and bathroom waste lines, kitchen waste outlets, balcony rainwater lines and general building drainage where Type A SWR pipes are specified.

Efficient soil and waste discharge
Smooth bore for better flow
Lightweight and easy to handle
Corrosion and chemical resistant

Benefits and icon sections

Built for reliable drainage with practical site advantages.

Allwin SWR Pipes help builders, plumbers and project teams create dependable soil, waste and rainwater disposal networks with less handling effort and long service life.

UV Resistant

Designed to support exposed drainage lines and outdoor rainwater pipe runs.

Light Weight

Easy to transport, lift and install across floors, shafts and service areas.

Cost Effective

Economical pipe system with lower handling effort and reduced maintenance needs.

High Strength

Strong UPVC construction helps handle regular drainage service conditions.

Smooth Flow

Low-friction inner wall supports faster discharge and reduces deposit formation.

Corrosion Resistant

UPVC material does not rust and resists common wastewater effects.

Usage and applications

Useful across building drainage, sanitation and rainwater disposal.

SWR systems are selected wherever wastewater and rainwater need to be moved safely from occupied spaces to inspection chambers, collection lines or approved disposal points.

Toilet Soil Lines

Used for carrying soil discharge from WCs through vertical and horizontal drainage stacks.

Bathroom Waste Lines

Suitable for wash basins, floor traps, shower areas and bath wastewater connections.

Kitchen Waste Outlets

Supports wastewater disposal from sinks, utility areas and service balconies.

Rainwater Downpipes

Useful for terrace, balcony and roof rainwater discharge in buildings.

Residential Buildings

Ideal for homes, villas and apartments requiring durable drainage networks.

Commercial Projects

Suitable for offices, hospitals, schools, shops and institutional sanitation systems.

Soil Discharge

Moves toilet discharge from building fixtures to drainage collection systems.

Wastewater Removal

Handles wastewater from bathrooms, kitchens and utility areas with smooth flow.

Rainwater Management

Supports rainwater disposal from terraces, balconies and external pipe runs.

Low Maintenance

Corrosion resistant UPVC keeps drainage lines dependable over long-term use.

SWR pipe specifications

Available sizes and technical range.

Specification summary for Allwin Drain-Fit SWR Pipes Type A with technical details only.

Product Range	Type	Nominal Size	Approx. Metric Size	Standard	Primary Usage
Allwin Drain-Fit SWR Pipes	Type A	2 inch	50 mm	IS: 13592	Bathroom, basin and light waste lines
Allwin Drain-Fit SWR Pipes	Type A	2 1/2 inch	63 mm	IS: 13592	Branch waste and rainwater support lines
Allwin Drain-Fit SWR Pipes	Type A	3 inch	75 mm	IS: 13592	Soil, waste and vertical stack connections
Allwin Drain-Fit SWR Pipes	Type A	4 inch	110 mm	IS: 13592	Main soil stacks, drainage and rainwater downpipes

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Contact Allwin Pipes for SWR size selection, project supply and product availability details.

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Founded in 1993, Allwin Pipes has grown from a regional manufacturer to a globally recognized piping solutions brand.

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