SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT Autotrol (1030358) 8 GPM External Drain Flow Control which uses a different piston

which uses a different piston design and port configuration

replace Q5520 cartridge annually to prevent bacterial growth and maintain filtration effectiveness

Installing Your Pentek Valve-In-Head Housing

Multiple configuration options allow customized setups for your specific application requirements

5" inline cartridge with twist-cap installation for cyst

SMC (6850490) 685 Hastelloy Poly Check Valve 1/2" NPT Autotrol (1030358) 8 GPM External Drain Flow Control which uses a different pistonSMC Professional Grade SMC 685 Hastelloy Poly Check Valve 1 2" NPT Polypropylene inline check valve with Viton seals and Hastelloy springs for reliable backflow prevention in demanding water treatment applications Model 6850490 125 PSI WOG Chemical Resistant WHY IT WORKS Built for Corrosive Environments Hastelloy Spring Corrosion resistant Hastelloy spring maintains consistent closing force even in aggressive chemical environments where standard