Description
McAlpine SMP10 40mm 1½” 50mm Seal Bath Trap
McAlpine SMP10 is a 40mm / 1½” bath trap with a 50mm water seal. It is designed for bath waste installations where a deeper seal is required compared with a shallow 19mm seal bath trap.
McAlpine SMP10 Trade Overview
The McAlpine SMP10 bath trap is a practical choice for plumbers, bathroom fitters and maintenance teams working on domestic bath waste pipework. It is suitable for use with McAlpine bath wastes and is commonly used on replacement bath trap jobs, bathroom refurbishment work and general plumbing repairs.
This trap has a 50mm water seal to help reduce the risk of drain odours coming back through the bath waste. The deeper seal makes it a useful option where more seal depth is preferred over a shallow bath trap.
The SMP10 is manufactured from white polypropylene, giving a durable and lightweight fitting for everyday trade use. It also features a 1½” universal compression outlet designed to suit common waste pipe materials including plastic, copper and lead pipe.
Key Features
- McAlpine SMP10 50mm seal bath trap
- 40mm / 1½” size for bath waste pipework
- 50mm water seal to help prevent drain odours
- Suitable for use with McAlpine bath wastes
- White polypropylene construction
- 1½” universal compression outlet
- Suitable for plastic, copper and lead waste pipe
- Compression connection for straightforward fitting
- Good option for bath trap replacement work
- Suitable for domestic and trade plumbing installations
Common Uses
- Bath waste installations
- Replacement of old 40mm bath traps
- Bathroom refurbishment projects
- Domestic bathroom repairs
- Rental property bathroom maintenance
- Trade plumbing installations
- Bath waste pipework where a 50mm seal is preferred
Why Choose a 50mm Seal Bath Trap?
A 50mm seal bath trap gives a deeper water seal than a shallow 19mm bath trap. This can be useful on bath waste installations where there is enough space below the bath and where a deeper trap seal is preferred.
The McAlpine SMP10 is a useful stock item for bathroom fitters and plumbers because it suits common 40mm bath waste pipework. The universal compression outlet also helps when connecting into new or existing waste pipe runs.
Installation Notes
Before fitting, check that the bath waste and waste pipe size are suitable for a 40mm / 1½” trap. Cut the waste pipe cleanly and make sure it is fully seated inside the compression outlet. Tighten the compression nut securely by hand, then run water through the bath waste and check all joints for leaks.
The McAlpine SMP10 is a 50mm seal bath trap. For restricted spaces below baths, a shallow bath trap such as the Q10 may be more suitable.
Browse more products in our 40mm Waste Traps 1½” range, or view the full Waste Traps, Valves & Connectors category.
For manufacturer information, see the McAlpine product information.







