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Old 09-02-2012, 05:02 PM   #1
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Fabricate a Trap Instead of Buying a P-Trap


I have run into an unusual situation. The tenant complained about a slow kitchen sink drain. Upon examination we found that the drain pipe from the trap to where it goes into the wall was sloping uphill.

The standard P-trap when installed would not permit a better pitch.

Would it be practical to fabricate a trip using pieces of pipe so as to get a "trap outlet" higher up and then the pipe going to the drain in the wall would be pitched better?

The alternative would be to cut open the wall and make changes to the vertical drain pipe inside, putting in a tee closer to floor level so the pipe from the sink will be pitched better.
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Old 09-02-2012, 05:07 PM   #2
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Fabricate a Trap Instead of Buying a P-Trap


Just cut the tail piece shorter.
You need a reguler trap so it can be taken apart to clean it out.
What in the world is that pipe with a cap on it suppost to be for?
Lowes and Home Depot sell a special cutter just for this job. There so thin that often they crack. It works better then a reguler pipe cutter or a hack saw.


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Old 09-02-2012, 06:38 PM   #3
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Fabricate a Trap Instead of Buying a P-Trap


(The tee and cap at the bottom are a cleanout.)
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Old 09-02-2012, 07:04 PM   #4
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Fabricate a Trap Instead of Buying a P-Trap


It's useless get rid of it. The trap when removed becomes your clean out access.
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Old 09-02-2012, 07:33 PM   #5
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Fabricate a Trap Instead of Buying a P-Trap


I believe the maximum trap seal depth for a trap is 4" If you can build one within this dimension and get grade on the trap arm- go for it. Yes its nice to have unions, but not required.
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Old 09-05-2012, 07:23 AM   #6
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Fabricate a Trap Instead of Buying a P-Trap


I inspected the drain more closely and it looks as if a regular P-trap will work. I'll use the idea of cutting the sink tailpiece shorter so the trap is higher up. Thanks.
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Old 09-05-2012, 09:32 AM   #7
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Fabricate a Trap Instead of Buying a P-Trap


ace that short piece into the straight to the wall thenuse a street elbow(if they have a PVC street) elbow into elbow going out after the trap
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Old 09-06-2012, 01:17 PM   #8
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Fabricate a Trap Instead of Buying a P-Trap


I store dog food and toys under my kitchen sink and my p-trap gets banged around quite a bit.

Since I could not find a sturdy p-trap (all were thin translucent plastic types) so I ended up making one myself using PVC.

The entire assembly up to the stub (arrow) can be removed for cleaning, if necessary.

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Old 09-06-2012, 08:08 PM   #9
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Fabricate a Trap Instead of Buying a P-Trap


That actually looks like it worked out pretty well, but it's still only as sturdy as the slip joint connection you have to the tailpiece IMHO.


I've had customers ask for something similar to that before, and I just wonder : wouldn't it be a little easier to just be careful?

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Old 09-06-2012, 08:29 PM   #10
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Fabricate a Trap Instead of Buying a P-Trap


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Originally Posted by Alan View Post
That actually looks like it worked out pretty well, but it's still only as sturdy as the slip joint connection you have to the tailpiece IMHO.


I've had customers ask for something similar to that before, and I just wonder : wouldn't it be a little easier to just be careful?

Yes, slip joint is the weakest point, but everything before that is far more sturdy than the kits I checked out.

Being careful sounds perfect, except I have energetic 5 and 3 year olds, all fighting each other to grab the food container to feed the dog!

I swear, my dog sees this and runs away, even if she is hungry

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