I was disappointed to find that there were several errors in the plumbing that I have been working so hard to get to the inspection stage. I broke a couple of rules, one that I knew about and another that I didn’t know.
First one of the most common errors that I KNEW about is using a sanitary tee for a horizontal drain. In my quest to include a stupid cleanout behind the family room bathroom sink, I ended up extending the pipe with a sanitary tee. Just not thinking I guess.
So I’m just going to eliminate the cleanout and use a sweep elbow for the drain.
The second error was not something I was aware of or understood. The water in the trap may not be above the opening to the vent. They call the normal water level in the trap the water weir.
Some additional illustrations of the trap weir rule.
I broke this rule both at the master bathroom sink by raising the drain at the end of the pipe run, and the bar sink.
In the master bath the solution is to turn the upturned pipe towards the sink, and for the bar sink I will have to raise the air vent tee.
I also have to install nail plates on both sides of the studs where the water pipes run. He said they had to have clearance of 1.5 inches from the stud edge. And a back flow valve on the hand held shower in the master bath to prevent water from entering the supply if the shower is dropped into the tub.
Besides looking at the plumbing, the inspector looked at the gas line to the stove and said it has to be black pipe all the way into the cabinet, not flex pipe. He also looked at the wood boiler, and said he needed the installation instructions to be sure it was installed correctly. So I sent him the manual and the data on the pressure relief valves and an explanation of our installation.