The McAlpine 1 and ½ inch 90mm high flow shower trap is designed for use in conjunction with any shower trays that are built with a 90mm waste hole. This product has been tested under under a constant 15mm head of water in accordance with clause 5 of BS EN 274-2:2002 and has a flow rate of 42 /1 per minute.The flanges are available in white or chrome plated plastic, meaning that you can purchase the one that best suits your finish.Manufactured in polypropylene and Supplied with 135° Bend - BSP coupling nut x 1½\" Universal.