Grease and sand-oil interceptor installation checklist
Installation of a gravity grease interceptor, sand-oil separator or sampling manhole for a new or remodeled business, before backfill and after paving.
Based on: Plumbing code and common pretreatment program requirements
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Approval
| Item | Pass | Fail | N/A |
|---|---|---|---|
| Plan review done and size, location and model approved in writing before installation | |||
| Installed unit matches the approved size and model Photo |
Before backfill
| Item | Pass | Fail | N/A |
|---|---|---|---|
| Interceptor and sampling manhole set level on the specified base, with baffles, tees and outlet in place Photo | |||
| Inlet and outlet piping, slope and vents per the detail | |||
| Exfiltration test: filled, topped up after stabilizing, no drop in 30 minutes (typical); or a vacuum test |
Plumbing
| Item | Pass | Fail | N/A |
|---|---|---|---|
| Only the intended fixtures drain to it: kitchen fixtures and 3-compartment sinks to a grease interceptor; floor and wash drains to a sand-oil separator | |||
| No toilets, urinals or other sanitary fixtures discharging through the interceptor | |||
| Interceptor serves one business only | |||
| Sampling manhole downstream of the interceptor, where required |
After paving
| Item | Pass | Fail | N/A |
|---|---|---|---|
| Frames and covers at grade, traffic-rated where needed, and every compartment reachable for inspection and pumping Photo | |||
| Owner told the cleaning and record-keeping requirements |
Photo A photo is expected with this item.
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This checklist is a starting point. Check each item against your current permit and your agency's standards before relying on it. For sewer districts and public works departments in any state: construction and acceptance of public sewer mains, private laterals and interceptors, and grease (FOG) compliance at food service businesses. Test methods follow common standards (UNI-B-6, ASTM F1417, ASTM C1244). Values marked "typical" are common values from published sewer agency standards and pretreatment rules; replace them with your own agency's standards and ordinances.
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In inspectorjay, every item gets a pass or fail, a dictated note, and geotagged photos, and the report goes to the contractor before you leave the site.