When you buy a replacement cartridge the shape of the gasket on the bottom has to be EXACTLY like the old one. Close is not acceptable. Your faucet was made by KCG. They have four different versions of it but three of them are the same size, just the color is different. You need to know the o.d. and length to get the correct one. BUT, since KCG is NOT a "popular brand" in most areas, you will probably have to order it from a "full line" parts company, such as Brown's Partsmaster Inc.