Stage 3P – Plumbing
It is the builder’s responsibility to build to the NOAH standard. These are minimum standards of life safety, construction for temporary or permanent living and energy efficiency. It is the inspector’s responsibility to do his best to “inspect the build” and confirm in his opinion the home appears to meet the minimums. Builders are welcomed and encouraged to exceed the minimums.
The following is what to expect the inspector to look for:
Each inspection begins with a close up of VIN label
Inspection tips for Rough plumbing Inspection:
Supply lines should be pressurized with air or water to a minimum of 80 lbs. PSI for this inspection. To accomplish this many builders are attaching a pressure meter to the hose bib. The inspector will check the pressure before and after the inspection.
Also the waste water line should hold a 10’ column of water during the inspection. Builders can fill the vent pipe with water to meet this requirement.
Question about “Studor” vents, Air Admittance Valves or vents. They can be used and however there must be one vent to the outside to vent the methane gas.
According to NFPA 1192 the gas piping must hold 3 lbs. of pressure for 10 minutes.
See Pressure test set-up here:
Instructions for checking for switched water lines (hot should be the left). Turn off hot water valve, turn on hot (left) water at sinks and shower…it should be off and not running water at all. Flush the toilet…it should fill up. If not, there is hot water filling the toilet tank.