How to Pass Your Boston Restaurant Health Inspection: A Plumbing Checklist

Boston's Inspectional Services Department (ISD) food establishment inspections are thorough, unannounced, and consequential. A single major plumbing violation can trigger a mandatory re-inspection, a public posting of violations, or in severe cases, an immediate closure order.

This plumbing-focused checklist covers the 12 areas Boston ISD inspectors evaluate most closely — and what you can do to be permanently prepared.

The 12-Point Boston Restaurant Plumbing Inspection Checklist

1. ✅ Kitchen Floor Drains — Free-Flowing

What inspectors check: Drains must drain freely. Standing water in the kitchen is an automatic major violation. How to pass: Maintain weekly enzyme drain treatment on all floor drains. MKMaintX's weekly program includes a drain flow test on every drain at every visit.

2. ✅ Drain Strainers — Clean and In Place

What inspectors check: Every kitchen floor drain must have a clean, intact strainer in place during operation. How to pass: Strainers are cleaned and inspected at every MKMaintX weekly visit.

3. ✅ Grease Trap — Not Overflowing or Backing Up

What inspectors check: No evidence of grease trap overflow — no staining around the access lid, no backup into adjacent drains. How to pass: Weekly visual grease trap inspection by a licensed plumber (included in MKMaintX's program) catches overflow risk 2–3 weeks before it becomes a problem.

4. ✅ Grease Trap — Maintenance Records Available

What inspectors check: Increasingly, Boston ISD inspectors ask to see evidence that the grease trap is being maintained. How to pass: MKMaintX provides a written service report after every weekly visit. Keep the last 3 months of reports accessible.

5. ✅ Hot and Cold Water — Adequate Pressure and Temperature

What inspectors check: Hot water must reach at least 100°F at handwashing sinks and 140°F at commercial dishwashers. Pressure must be adequate. How to pass: Have your water heater setting and pressure checked annually by a licensed plumber.

6. ✅ Handwashing Sinks — Unobstructed and Stocked

What inspectors check: Designated handwashing sinks must be accessible, unobstructed, and stocked with soap and single-use towels at all times during operation. How to pass: Operational protocol — make sure staff know handwashing sinks are never used for food prep or dish storage.

7. ✅ Three-Compartment Sink — Properly Configured

What inspectors check: Wash, rinse, and sanitize compartments must be correctly sized, draining properly, and in use. How to pass: Ensure all three compartments drain freely and that water temperatures are maintained.

8. ✅ No Evidence of Sewage Odor

What inspectors check: Strong sewer gas odor in the kitchen or dining room indicates a plumbing problem — missing drain trap, deteriorated P-trap, or dry floor drain. How to pass: Weekly enzyme treatment eliminates drain biofilm — the primary source of drain odor in commercial kitchens.

9. ✅ Mop Sink — Properly Plumbed with Air Gap

What inspectors check: The mop sink must have an air gap between the water supply and the mop sink basin to prevent backflow contamination. How to pass: This is a one-time fix if not present. A licensed plumber can add an air gap in under 2 hours.

10. ✅ No Cross-Connections

What inspectors check: Water supply lines must not have direct connections to drain or sewer lines without backflow prevention. How to pass: Annual backflow preventer inspection by a licensed plumber.

11. ✅ Ice Machine Drainage

What inspectors check: Ice machine drain must connect indirectly to the sewer (air gap required) and must drain freely. How to pass: Include ice machine drain in your weekly drain maintenance program.

12. ✅ Exterior Grease Collection

What inspectors check: Cooking oil recycling container must be on an impervious surface, lidded, and not overflowing. How to pass: Operational protocol — schedule cooking oil pickups before the container is full.

How MKMaintX's Weekly Program Addresses 7 of These 12 Items

Of the 12 items on this checklist, 7 are directly addressed by MKMaintX's $69.99/week restaurant drain maintenance program:

• ✅ Item 1: Drain flow testing at every visit
• ✅ Item 2: Drain strainer cleaning and inspection
• ✅ Item 3: Visual grease trap inspection
• ✅ Item 4: Written service documentation
• ✅ Item 8: Enzyme treatment eliminates drain odor
• ✅ Item 11: Ice machine drain can be included in the program
• ✅ Item 12: Technician will flag exterior grease issues

The remaining 5 items are addressed through proper operational protocols and periodic licensed plumber services — which MKMaintX can also provide.

Schedule Your Free Boston Restaurant Assessment

Call 1-800-669-5808 or contact MKMaintX online. We'll walk through your kitchen with you, identify your highest-risk plumbing areas, and set up a weekly maintenance schedule. Restaurants in our weekly program have a documented 0% drain-related violation rate over the past 3 years.

MKMaintX is licensed by the Massachusetts Plumbing Board and serves restaurants across all of Greater Boston and Eastern Massachusetts.