Pentair Diffuser O-Ring 3/16" x 4-7/8" | EQ Series Pump | 350037Z Filter Cartridges Anthony DE filter systems —

Anthony DE filter systems — specifically the Apollo 4000 and Flowmaster 4000 series

briefly open the air relief valve during startup to confirm air is purging correctly before bringing the filter up to operating pressure

Multi-Port Valve

⚠️ IMPORTANT: Outer Diameter Difference from OEM

Pentair Diffuser O-Ring 3/16" x 4-7/8" | EQ Series Pump | 350037Z Filter Cartridges Anthony DE filter systems —The Pentair 350037 is the OEM replacement diffuser O ring for the EQ Series Commercial Plastic Pump, sized 3 16" x 4 7 8". IMPORTANT: LUBRICATION REQUIRED SOLD SEPARATELY Always lubricate this O ring with a silicone based lubricant before installation. We carry the Pentair R172351 Lifeguard Silicone Lubricant the OEM matched product for Pentair equipment. This O ring seals the diffuser assembly within the EQ Series pump, preventing bypass of water