Description
McAlpine SR10 32mm 1¼” Running Tubular P Trap
McAlpine SR10 is a 32mm / 1¼” running tubular P trap for waste pipe installations where a horizontal trap connection is required. It is suitable for domestic plumbing, repair work, maintenance jobs and trade installations where a reliable 32mm running trap is needed.
McAlpine SR10 Trade Overview
The McAlpine SR10 running tubular P trap is designed with a U-shaped trap body and horizontal connections. This makes it different from a standard basin P trap, which normally has an open vertical inlet at the top. The SR10 is used where the waste pipework needs to run through the trap rather than drop directly into it from above.
This trap has a 75mm water seal to help stop foul odours from coming back through the waste system. It is made from white polypropylene, giving a clean finish and a durable fitting for everyday plumbing use.
The SR10 uses a Multifit compression outlet, which is suitable for common waste pipe materials including plastic, copper and lead pipe. This makes it a useful stock item for plumbers, maintenance teams and trade customers dealing with awkward or existing waste pipe layouts.
Key Features
- McAlpine SR10 running tubular P trap
- 32mm / 1¼” size for waste pipe installations
- Running P trap design with horizontal pipe connections
- 75mm water seal to help prevent drain odours
- White polypropylene construction
- Multifit compression outlet for flexible pipe connection
- Suitable for plastic, copper and lead waste pipe
- Useful for repair, maintenance and replacement work
- Suitable for domestic and trade plumbing use
- Good option where a standard top-inlet P trap is not suitable
Common Uses
- 32mm waste pipe trap installations
- Horizontal waste pipe runs
- Bathroom and basin waste pipework where a running trap is needed
- Replacement of old 32mm running P traps
- General plumbing repair and maintenance work
- Rental property plumbing repairs
- Domestic refurbishment jobs
- Trade plumbing installations
Why Choose a Running Tubular P Trap?
A running tubular P trap is useful when the pipework needs to connect horizontally through the trap. This can be helpful on repair jobs, maintenance work and existing waste layouts where a standard vertical inlet trap will not line up correctly.
The McAlpine SR10 gives installers a simple, dependable 32mm option for these setups. The 75mm water seal helps protect against odours, while the Multifit compression connection helps with fitting to different waste pipe materials.
Installation Notes
Before fitting, check that the existing waste pipe size is suitable for a 32mm / 1¼” trap. Cut the pipe cleanly and make sure it is fully seated inside the compression fittings. Line up the running trap with the pipework, then tighten the compression nuts securely by hand.
After installation, run water through the waste system and check every joint for leaks. Make sure the trap remains accessible for future cleaning and maintenance.
Browse more products in our 32mm Waste Traps 1¼” range, or view the full Waste Traps, Valves & Connectors category.
For manufacturer information, see the McAlpine product information.







