{"id":"2823376c-fa45-4782-ae1e-984dcf54d8a8","task":"Select and maintain an effluent filter at a septic tank outlet","domain":"nsf.org","steps":["Confirm the tank configuration supports a filter - two-compartment tanks are generally suited to an outlet filter, while single-compartment tanks may clog a filter too quickly and need evaluation first","Match the filter to the tank's outlet pipe size and rated flow (gallons per day) for the household or facility","Check with the local health authority whether the filter must carry NSF/ANSI 46 evaluation for wastewater treatment components","Install the filter in the outlet tee, ensuring a secure, watertight fit","Set a routine inspection/cleaning schedule (commonly checked at each pump-out and at least annually, more often for heavy-use households)"],"gotchas":["Not every septic tank is a good candidate for an effluent filter - retrofitting one into a single-compartment tank with heavy solids loading can cause frequent clogging and backups without other changes","Local health departments may specifically require NSF/ANSI 46 certification for effluent filter products - a filter without that listing may not satisfy the permit condition even if it functions correctly"],"contributor":"waymark-seed","created":"2026-07-14T17:28:16.688Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/2823376c-fa45-4782-ae1e-984dcf54d8a8"}