Pentair 33600-0023T 2-Inch Pressure Gauge Replacement for select Sta-Rite Pool and Spa Filters Pressure gauge replacement Fits Sta-Rite System 3 Modular Media SM series pool and spa cartridge filters model S7M120, S7M400, S8M150, S8M500 Compatible with Sta-Rite DEPB Vertical pool and spa D.E. filters models DEPB36, DEPB36-1, DEPB36-IN, DEPB51, DEPB51-IN, DEPB83, DEPB83-1, DEPB83-1 Fits with Sta-Rite System 3 SD series pool and spa D.E. filter model S7D75, S8D110 Also fits with Sta-Rite HRPB high-rate pool and spa sand filters