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The PENTAIR sh144368 is a spanner wrench designed for removing and installing 20-inch heavy-duty filter housings. It provides the mechanical leverage needed to break the seal on large-diameter housings without damaging the housing cap or sump. This tool is a standard service item for plumbers, water treatment technicians, and pool or commercial filtration service pros who perform routine filter cartridge changes or system maintenance on oversized housings.
This wrench is intended for use with 20-inch heavy-duty filter housings commonly found in commercial water filtration systems, high-flow residential applications, and pool or industrial supply lines. It is used at the point of filter cartridge replacement or housing service and eliminates the need for improvised tools that can crack or strip housing sumps.
Designed for use with 20-inch heavy-duty filter housings. Confirm housing collar diameter before use to ensure proper fit.
Shut off the water supply and depressurize the system by opening a downstream valve before attempting to remove any filter housing. Use this wrench only on the designated housing sump collar it is sized for. Plumbers and water treatment technicians typically perform this service. Follow applicable IPC guidelines for water filtration system maintenance.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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