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The residential inspection checklist for topout/frame (plumbing) includes:

  • Gas line tested at minimum ten (10) psi air pressure for minimum ten (10) minutes (two (2) readings required), City policy and section G2417.4, I.R.C.
  • Gas piping size per plan in compliance with section G2413.3, I.R.C.
  • Gas steel piping horizontal supports; ½ inch pipe/six (6) feet oc (maximum), ¾ or 1 inch/eight (8) feet oc (maximum), 1¼ inch or larger/10 feet oc (maximum), section G2424, I.R.C.
  • Gas steel piping vertical supports: every floor level, section G2424, I.R.C.
  • Gas S.O.V. in the same room and within six (6) feet of appliance.  Installed upstream of the union, connector or quick disconnect device it serves, section G2420.5, I.R.C.
  • All appliances (with an ignition source) in the garage must be securely mounted on a minimum 18 inch high platform, section M1307.3, I.R.C.
  • All appliances located in a garage or carport must be protected from vehicle impact, section M1307.3.1, I.R.C.
  • Water supply lines tested at operating pressure, City policy.
  • Water piping (main, branch and riser) size per plan in compliance with section P2903.7, I.R.C.
  • Water heater T & P relief valve installed per City amended section P2803, I.R.C.
  • All copper lines to be separated from contact with dissimilar metallic materials.
  • Approved vacuum breaker on hose bibbs (with secured set screw in place), section P2902.4.3, I.R.C.
  • Soil, waste and vent lines tested with 10 feet of head  (water) pressure, section P2503.4, I.R.C.
  • All soil/waste lines to be supported and to slope not less than ¼ inch per foot (1/8" inch per foot for 3 inches or more of pipe diameter), sections P2605.1 and P3005.3, I.R.C.
  • Waste trap arms: 1¼ inch trap arm/maximum five (5) feet, 1½ inch trap arm/maximum six (6) feet, two (2) inch trap arm/maximum eight (8) feet, three (3) inch trap arm/12 feet, Table 3105.1, I.R.C.
  • Proper sweep, tee, wye and bend fittings for soil/waste piping, section P3005, I.R.C.
  • Horizontal vent pipes forming branch vents shall be at least six (6) inches above the flood level rim of the highest fixture served, section P3104.5, I.R.C. ***Please note: An "anti-siphon vent valve" can only be used if approved in advance by the City's Building Official.
  • Approved shower control valves (pressure-balance, thermostatic-mixing or combination type) with high temperature limit stop set at maximum 120 degrees F., section P2708.3, I.R.C.
  • Minimum 30 inch clear width at water closets (15 inch to centerline of water closet), section R307.1, I.R.C.
  • All water, gas and DWV piping must be installed and supported per manufacturer's specifications and per section P2605, I.R.C.
  • A fixture with an integral trap, readily removable without disturbing concealed piping is acceptable as a cleanout equivalent, section P3005.2.10, I.R.C.
  • Grout "box out" at traps.
  • Washing machine standpipe; extend minimum 18 and maximum 42 inches above the trap weir, section P2706.2, I.R.C.
  • All water and DWV piping must be protected (shield plates) within 1 1/2" inches from the edge of a framing member, section P2603.2.1, I.R.C.
***Please note:  Shield plates shall have a minimum thickness of No. 16 gauge and shall extend not less       than 2 inches above sole plates and below top plates.
  • All gas piping within 1 1/2" inches from the edge of a framing member, must be protected (shield plates), section G2415.7, I.R.C.
***Please note:  Gas pipe protective steel shield plates having a minimum thickness of No. 16 gauge shall extend a minimum of four (4) inches above sole plates, below top plates and each side of studs, joists and rafters.

Contact Information

City of Litchfield Park
Building Safety Department
213 West Wigwam Boulevard
Litchfield Park, Arizona 85340

Ph: 623-935-1066
Fx: 623-535-9754

Updated 4/22/16