Sta-Rite System 3 S7M120 Replacement Filter
cartridge filter system · 2 cartridges
Frequently Asked Questions
What filter cartridge does the Sta-Rite System 3 S7M120 use?
The Sta-Rite System 3 S7M120 uses the cartridge listed above. Confirm the quantity in your owner's manual or by counting the cartridges in the housing when you open it up. Some Sta-Rite models in the same series use a different number of cartridges than others.
How often should I replace the cartridge in my Sta-Rite System 3 S7M120?
Smaller cartridges like the one in the Sta-Rite System 3 S7M120 usually last 12 to 18 months. The clearest replacement signal is a filter pressure that won't come down after cleaning. Pleat damage (tears, channeling, permanent discoloration) is the other one. Either gets you a new cartridge, regardless of how old the current one is.
How do I clean the filter cartridge in a Sta-Rite System 3 S7M120?
Turn the pump off and bleed the pressure from the filter tank (open the air relief valve at the top). Then open the housing and pull the cartridges. The Sta-Rite System 3 S7M120 runs 2 cartridges; if any one of them is dirty, the others are too, so pull all of them. Hose them down at a 45-degree angle between the pleats, working top to bottom. For a deeper clean every few months, soak in a pool filter cleaner solution per the product's dwell instructions, then rinse before reinstalling. Don't use a pressure washer. The high pressure tears pleats permanently.