Quiet Exposed Diaphragm Type Chrome Plated Closet Flushometer. PERMEX Synthetic Rubber Diaphragm with Dual Filtered Fixed Bypass. ADA Compliant Metal Oscillating NonHoldOpen Handle with Triple Seal Handle Packing. We are one of the Prime E-Commerce retailers for a vast portfolio of products and have been strengthening our foothold in the competitive world of Online Retail.