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The Range£3.96Visit shop Mcalpine Rubber Seal For St90 Traps - P-Rw-Stw90 - Leak Prevention - Black
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The McAlpine Rubber Seal (P-RW-STW90) is designed for professional plumbers and DIY homeowners seeking a reliable, leak-free connection for their ST90 waste traps. This essential replacement part ensures a high-integrity seal that prevents water escape and maintains sanitary plumbing standards. While it is engineered for high durability, users should ensure they are using the correct trap model, as it is strictly sized for the ST90 series and will not fit other trap configurations.
| Model Part Number | P-RW-STW90 |
|---|---|
| Brand | McAlpine |
No, this seal is specifically designed for McAlpine ST90 traps and may not provide a reliable fit for other manufacturers.
Typically, the rubber seal is designed to function as a dry gasket; however, check your local plumbing codes if additional sealant is recommended for your specific application.
If you notice water pooling under your trap or signs of moisture/dampness near the connection point, the seal has likely hardened or lost its elasticity.
It is highly recommended to use a new seal whenever the trap is disassembled to ensure a proper, leak-free connection.
Yes, it is designed to withstand standard household temperatures associated with waste water from showers and sinks.
Check that the trap assembly is fully tightened and that the seal is not pinched or misaligned.
Verify that your specific trap model is the ST90 series, as this seal is not universal.
To install, first unscrew the waste trap assembly completely. Remove the old, worn seal and thoroughly clean the seating area to remove any limescale or residue. Position the new P-RW-STW90 seal evenly across the flange. Reattach the trap components, tightening them firmly by hand; avoid using metal tools for tightening to prevent cracking the plastic threads. For care, avoid using harsh acidic drain cleaners that may corrode the rubber over extended periods.
