Failed plumbing inspection, need some ideas

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Reach4

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wwhitney

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To my understanding, all a trap adapter does is provide 1.25" (or 1.5") MIP threads, for a slip joint nut and a rubber washer. So if you have 1.25" MIP threads already, you don't need anything else.

Cheers, Wayne
 

Reach4

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So why does that part exist?
My prioritized, somewhat fanciful, list:
  1. Some people are used to needing a trap adapter.
  2. Avoid adding galvanized
  3. Appease ignorant inspectors
  4. Handle buggered-up pipe end like this one?
  5. Sticks out of wall less than coupler+nipple
  6. Fit on schedule 120 threaded pipe
 

Jeff H Young

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on a real job you do need a trap adapter . house plumbing and repair work excluded. Go on a hospital or a school institution you wont be using a nipple with a slip nut and washer only. just the way it is I guess proper connection don't even remember why but you always use a trap adapter.
I'm glad inspector passed job for you
 

Reach4

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on a real job you do need a trap adapter .
From what I read in other posts, if you have a 1.5 inch MIP pipe coming out of the wall, you don't normally put a trap adapter on that, but just use the nut and washer.

I did not know that, and I ended up chasing down that elusive 1.5 FIP/SlipJoint trap adapter. I got a 1.5 NPT die. I tried to chase threads. And I ended up cracking the cast iron santee applying a lot more torque to the copper trap adapter than needed.

I tried to fill the crack with J-B Weld. Seems everybody likes that but me. Did not stick to the cast iron. Leaked.

But probably for the best, because the galvanized below that santee was pretty clogged up. I ended up running plastic with a coupled of couplings. Sure would have been much easier and cheaper if I just did that to begin with.
 
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Jeff H Young

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From what I read in other posts, if you have a 1.5 inch MIP pipe coming out of the wall, you don't normally put a trap adapter on that, but just use the nut and washer.

I did not know that, and I ended up chasing down that elusive 1.5 FIP/SlipJoint trap adapter. I got a 1.5 NPT die. I tried to chase threads. And I ended up cracking the cast iron santee applying a lot more torque to the copper trap adapter than needed.

I tried to fill the crack with J-B Weld. Seems everybody likes that but me. Did not stick to the cast iron. Leaked.

But probably for the best, because the galvanized below that santee was pretty clogged up. I ended up running plastic with a coupled of couplings. Sure would have been easier and cheaper if I just did that to begin with.
haven't had a much trouble with nipples but have been forced to use a trap adapter before by inspector or job specs on the high dollar pickey ones. We call them a desanco trap adapter don't have the link
 
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