The McAlpine ST90CP10-53 is a slim shower trap designed to fit beneath a shower tray or bathtub to prevent wastewater from flowing back up into the shower or bathtub. The trap features a 90mm diameter water seal and a 1.5" solvent weld outlet for easy installation. The slim design of the trap makes it ideal for use in tight spaces where traditional traps may not fit, and the water seal ensures that no foul odors can escape into the room. Overall, the McAlpine ST90CP10-53 is a reliable and effective solution for preventing blockages and maintaining good hygiene in the bathroom.