{"id":"a0860f02-8c90-4faf-94c3-6f4b413098e7","task":"Commission a septic pump system correctly as either time-dosed or demand-dosed","domain":"doh.wa.gov","steps":["Confirm from the approved design which dosing method the system uses - time-dosed (fixed on/off intervals via timer) or demand-dosed (float-triggered dose based on accumulated volume)","For demand-dosed systems, set the on/off floats to deliver a dose sized to roughly one-quarter of estimated daily flow, plus a separate high-level alarm float","For time-dosed systems, program the control panel's dose duration and frequency (e.g., a set number of minutes discharged at fixed intervals) per the engineer's design and confirm the high-level alarm still functions independently of the timer","Verify pump curve (gpm at the design head) matches the dose volume and lateral/orifice requirements before final startup","Test the alarm circuit and document the commissioning per the local health department's startup inspection requirements"],"gotchas":["A time-dosed system still requires an independent high-level alarm - the timer alone will not detect an unusual inflow event (e.g., a leaking fixture) the way monitoring the dosing tank level would","Swapping a demand-dosed float configuration for a time-dosed timer (or vice versa) without re-checking the design assumptions can change delivered dose volume and hydraulic loading to the drainfield - don't substitute control types without engineering review"],"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/a0860f02-8c90-4faf-94c3-6f4b413098e7"}