Minnesota Plumbing Code · 2018 UPC

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Spot the violation in residential plumbing: traps and vents, drainage, water supply, water heaters, backflow and fixtures. Answers cite the 2018 UPC as adopted in the Minnesota Plumbing Code.

Citations are to the 2018 Uniform Plumbing Code as adopted with Minnesota amendments in the Minnesota Plumbing Code (Minn. Rules ch. 4714, effective Dec. 17, 2021). Where Minnesota changed a rule, the Minnesota note on the answer says so. Minnesota codes

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Traps & venting5 drills

UPC ch. 9, 10. S-traps, double traps, trap arms, trap seals, vent connections and roof terminations.

Drainage piping & fittings5 drills

UPC ch. 7. Slope, changes of direction, fitting orientation, cleanouts, materials.

Water supply & distribution5 drills

UPC ch. 6. Shutoff valves, pressure-reducing valves, PEX and copper, supports.

Water heaters5 drills

UPC ch. 5, 608. T&P relief and its discharge, expansion tanks, venting, pans, location.

Backflow & cross-connections5 drills

UPC 603. Hose bibbs, dishwasher air gaps, boiler and irrigation connections, submerged inlets.

Fixtures & clearances5 drills

UPC ch. 4. Toilet and lavatory clearances, showers and valves, tailpieces.

Minnesota plumbing licensing, permits & inspections4 drills

Minn. Stat. 326B.42-.49, Minn. Rules 1300. Who may do plumbing work, when a permit and inspection are required.