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I went with vent pipe up and connected to the existing vent through the roof instead of AAV's. Two years now and no problems. I don't see any reason AAV's wouldn't work if your codes allow them.

Probably should have gone with a higher flowing valve. I did modify the valve though and now get acceptable flow. Here are the results... Unmodified Delta Monitor 17 valve vs. modified valve flow rate. I was able to drill out some internal orifices a little larger to get better flow. I...

Okay, so looks like I've been chasing my tail for nothing. I just finished talking to Delta customer support, they claim that their gpm rating is based from the shower head (and also limited by the valve installed of course). They claim that the rough valve itself is capable of... 7.0gpm at...

One shower head will be fine, but it's when two shower heads are on at once, I'd like to have as much pressure as I can get out of the system. Here is what I know... On the rough valve, the tub port is less restrictive than the shower port, just looking at how they've drilled them out. The...

Correct, my concern is that the design of the twin ell will restrict flow to the tub spout, I need as much flow as I can possibly get out of the tub spout. I'm getting mixed info on whether a twin ell restricts flow out of the tub spout, but if you take a look at this image which is located in...

I wouldn't be able to use a port for on the diverter for the tub spout. With the setup we're going with, all of the positions of the diverter would be taken. It's a 6-setting, shower head, rainfall, hand wand. Here was the initial problem which got me here, I have a 120 gallon whirlpool that...

Please see the attached image. Is this something that can/should be done? I've read of doing similar for showers in order to get around the restricted shower port (2.75gpm), but, I also need the tub spout functional and have multiple shower heads. I want to make sure I get enough flow as...

120 gallon whirlpool tub Delta Multichoice R10000 valve (1/2" Pex crimp on) 6-setting Delta diverter valve Shower head, overhead, and hand wand. 10gpm Takati tankless. I have 3/4" Pex branching from main supply to my 2nd bath, all the way to the tub. I've had the tub in for some time now, and...

I'm trying to figure out the best route on my new bathroom plumbing. There are some constraints which make things really tight to route, so keeping the size at 1.5" would help, if possible. I've attached an image of the layout, and I have a few questions, mainly having to do with the vent...

Thank you.

There doesn't seem to be a minimum distance I could find, but this seems really close. I think it would be okay and have no issues draining since the lowest part of the trap arm is below the tub drain line, but this just looks odd being stacked so close. I already need a riser under the tub...