Step 7 · Rough-In Inspection

The final step before you can insulate and hang drywall is the rough-in inspection. The plumbing inspector will return to check all of your work. They will verify that the DWV and supply lines are installed correctly, properly supported, and meet all code requirements. They will likely require a pressure test on both the DWV and the supply lines. For the DWV system, this involves sealing the system with a test ball or inflatable plug and filling it with water up to a certain level (or pressurizing it with air) to check for leaks. The supply lines will be tested under normal house pressure. Do not proceed with wall coverings until you have passed this final plumbing inspection.

Tools and Materials

CHERNE Multi-Size 1-1/4 in. - 1-1/2 in. Rubber Test-Ball Pipe Plug 270016Watts 3/4 in. Plastic Water Pressure Test Gauge DP IWTGDANCO 0 - 15 psi 1/10 Increment Compressed Air Test Gauge 94352BLACK BULL 12-Volt 150 PSI Portable Air Compressor/Inflator/Pump AC150PLUMBFLEX 1 in. Expansion Barb Black PEX-A Plug End Cap for Pipe Plastic Poly Alloy PX100GQQM-NWater