If you notice any leakage around the seal of your filter, then the system needs replacement of the gasket. The Aqua Pure Gasket 34737-13C is the replacement part of the filter. The gasket is designed to fit Aqua Pure stainless steel water filtration systems. It will ensure a leak-free seal. It should be ensured that the installation takes place properly and no signs of deterioration are shown. For best results food-grade lubricant should be used while installation. The Aqua Pure Gasket is to be used with metal Aqua Pure filter housings. It is compatible with models SS2HA, SS1HA, SSTSD, SS2HB, SS1, AP1610, AP2610, and AP400.