The entire trim housing unscrews from the faucet underneath.
Grab the chrome base and unscrew. Sometimes you have to have very strong hands to do...
After depressurizing, I would rough up as much of the area as possible with something sharp and emery cloth.
Then, plan on laying on globs of ABS...
Vertical wet venting is all about fixture units and UPC (908.1) doesn't mention bathroom groups.
Bathroom groups come up in horizontal wet...
It may just need a good pipe dope on the threads, but look out! you are going to have a wet mess on your hands when you open up that dead leg.
It will be ok if you do it as drawn. Assuming that vent stack is vertical.
Both Delta and Moen have used various "gasket" materials at their sleeves.
Those materials break down for sure.
Mostly, we see the newer valves...
Open up behind the tub waste/overflow.
Code requires slip-joint w/o to have accessible hatch.
Always to have permanent access from the back side.
Gas dryers only emit CO through the dryer vent, you are correct.
Code for venting gas dryers is 15' max. with two elbows included.
"a 2'' trap arm will require a 2'' trap " follow the code.
I suggest you use no-hub type couplings at the plastic 2" trap to make servicing...
I believe what you are looking at is an air adjustment control.
It controls the amount of air that the jets suck in for small or large jet bubbles.
For UPC jurisdictions: you can run a 2" trap arm 5', or a inch and a half trap arm 3'-6".
The drawing you made is not proper on many points.
gregorymark, why was four inch pipe utilized?
For up to three bathrooms, three inch is all that is needed.
I have solved a very similar noise issue by replacing the PRV.
Either a higher flow capacity type like Watts U5B or using another brand and...
Cast iron drain pipe is the absolute solution. Especially the riser and the low, long sweep elbow.
After doing one two storey house with ABS, I...
LMGTFY, search revealed it is now called Parsons.
Snaking or jetting a drain is a well regarded way to solve your problem.
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