90mm Shower Trap with Spring-Loaded Non-Return Valve. Includes 1½? Solvent Weld Outlet Socket | Overall Height: 53mm. We pride ourselves on offering the most advanced and reliable shower traps on the market. This 90mm shower trap features a spring-loaded non-return valve designed to prevent backflow and eliminate foul air release into the dwelling, all while maintaining excellent performance in compact installations. Key Features: 90mm x spring-loaded non-return valve. 1½? solvent weld outlet socket. Ultra-low profile – only 53mm overall height, ideal for installations with restricted floor depth. Non-return mechanism opens with water discharge and reseals automatically to block foul air ingress. Valve can be easily removed for cleaning, ensuring continued performance and hygiene. High flow rate of 26 litres per minute, tested under a constant 15mm head of water. Ideal for modern shower tray installations. Compatibility: Available with longer flange options for thicker shower trays: ST90CP10-HP2, ST90CB10-HP2, ST90WH10-HP2 ? Use longer flange code: STW9050WSTBDY-43MM (for tray thickness: 21–29mm). ST90CPB-P-HP2 ? Use longer flange code: P-CPB-ST90-P50-43 (for tray thickness: 21–30mm). ST90CPB-S-HP2 ? Use longer flange code: P-CPB-ST90-S50-43 (for tray thickness: 21–30mm).