Rough Plumbing Inspection Checklist

Status of Completion

• Connection to water and sewer is made for the rough-in plumbing phase. [1]

Detailed Checklist

https://mybuildingpermit.com/sites/default/files/inline-files/IC_Residential_Plumbing-Rough-In_Final.pdf

Videos

• To test water lines - pressurize through the washer box - [2] - gauge on one line, air pressure on other.
• Short overview, doesn't say much but gets you into the inspector mood - [3]

• Relatively comprehensive video, with tub-shower pre-plumbed so none of its drain detail is shown:

• Or, see how inefficient it gets for a larger house - 6000 sf of concrete after rough plumbing - 150 yards - like 18 trucks/ Shows stressing of foundation cables [4]. Including copper pipe water service.

• Waste and water pressure testing - plugging all holes - showing different plugs , [5].

• The washing machine box - trim cover at end is adjusted to thickness of sheathing [6]

• Good one which shows what the inspector actually does - but this is not rough plumbing - just house plumbing inspection for home valuation purposes - [7]

Notes

• DWV - 5 psi air or water. See that valve holds. 0.1 psi graded valve.
  • How do you stop the bath tub overflow? Drain should close, but overflow
• Each trap protected by vent within allowed distance
• See cleanout requirements.
• Ford Fitting for water supply line if supply line connection is inside the house.
• 125 Water pressure test required
• Vacuum breakers on hose outlets
• Supply water line fill is inspected prior to covering
• Approved grounding system for water supply line?
• Tracer wire for water supply from meter to foundation
• Toilet clearance 15" from sides and 12" from back
• Nail plates for vent pipe - if you have sheathing above vents.
• Tape for joints in vents must be UL 181 listed. [8]
• Exterior wall water lines must be freeze protected. [9]
• Max 32" between PEX line supports. [10]. Attach so that water hammer does not end up making noise.
• Backflow preventer from street sewer.
• Tubs are level - so you simplify the trim work necessary around it [11]
• Toilet 12.5" from framing, or 12 from wall. [12]
• Caulk around toilet and bath?
• Functional water flow test - [13]
• 2 parts vinegar + 1 part baking soda as alt to Drano [14]

Tub

• If tub is preinstalled, how to close overflow? The over flow I capped off by making a plate to screw on and used a piece of mouse pad as a gasket. [15]
  • If tub is on second floor, its overflow can be the high water mark, so there is no need to close it. This would not apply if testing with air.
• For rough-in, the easiest approach to tub in our case (it doesn't fit through doors, so must be pre-located. Pre-located does not mean it has to be pre-plumbed. So leave the drain kit off - just make sure it is possible to install it _after_ the trap is installed.
• Assumes that trap doesn't have to be in for rough plumbing - just rough drain for tub. [16]

Sequencing

• Water Heater - Since it is a fixture [17] - a water heater is installed in the finish phase [18]
• Water heater is often installed at rough plumbing phase [19]

At Foundation Phase

• See Foundation Plumbing Inspection

Links

• Plumbing Inspection