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Old 04-06-2014, 06:15 PM   #1
cwc OP
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What is this? (Drain question)

Can somebody tell me what this is for?



The lid isn't attached in any way. Should it be?

It's in the drain for my tub/shower and it overflowed today, which I think means the pipe to the main drain is at least partially plugged.
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Old 04-06-2014, 06:35 PM   #2
MagyarMan
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I believe it may be a old time grease trap for containing grease and soap scum accumulation . Periodically needs to be cleaned out !
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Old 04-06-2014, 07:09 PM   #3
T Reynolds
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It's a drum trap. They were used in the nineteen fifties. Yes the top needs to be threaded down in order not to leak.
Pain in the ass mostly as they're always needing to be cleaned out, hence the removable top. I would try to eliminate that from the piping and replace with black plastic DVW.
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Old 04-06-2014, 07:15 PM   #4
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I just learned something. Thanks. The GF's home has one on the laundry discharge.
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Old 04-06-2014, 08:16 PM   #5
cwc OP
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Quote:
Originally Posted by T Reynolds View Post
It's a drum trap. They were used in the nineteen fifties. Yes the top needs to be threaded down in order not to leak.
Pain in the ass mostly as they're always needing to be cleaned out, hence the removable top. I would try to eliminate that from the piping and replace with black plastic DVW.
Thanks for the replies. As a group ADV knows EVERYTHING.

I think I'll just clean it so I can take a shower. My water pipes just thawed today after being frozen (underground) for about two months.

The top has no threads so can't be screwed down. I'll try a couple of the crappy Harbor Freight bar clamps until I can get some plastic pipe to replace this thing.
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Old 04-07-2014, 04:52 AM   #6
trailer Rails
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The cap should have a screw in the middle that expands a little device that clamps the lid down. They usually rust and fall apart or just quit working.

Ditch the lid and go buy a 3" Fernco cap (a black rubber cap with a hose lamp) from Home Depot and put that on top.

Or buy what is called a test plug in the 3" size (a device with a wing nut and a piece of rubber that expands).

I prefer the Fernco caps.
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Old 04-07-2014, 05:10 AM   #7
D.T.
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Geez, cast iron drain pipe! Haven't seen that in a while. The insides corrode and turn to shit.

+1 on the test plug. I think they have a wing nut in the center you can expand the rubber to seal them up. Made from plastic, usually yellow.

Or maybe this:



Mechanical pipe plug...

http://www.grainger.com/product/CHER...NF7?s_pp=false
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Old 04-07-2014, 09:50 AM   #8
Motomantra
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65 y/o house.

I removed all the cast & replaced it with plastic. Now when it clogs It's much easier to service.
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Old 04-07-2014, 07:15 PM   #9
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Mine was built in '52 with cast iron. For some reason, the cleanout plug was leaded in. It took more time to get rid of the plug than it did to clear the clog. There's a nice expanding test plug in it now.
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Old 04-07-2014, 08:12 PM   #10
cwc OP
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Quote:
Originally Posted by trailer Rails View Post

Ditch the lid and go buy a 3" Fernco cap (a black rubber cap with a hose lamp) from Home Depot and put that on top.
The cap was toast so I got the rubber one. I had to buy a 4" and it was just slightly large so I slipped a couple of one inch sections of inner tube over the trap and then the cap fit fine.

Quote:
Originally Posted by Motomantra View Post
I removed all the cast & replaced it with plastic. Now when it clogs It's much easier to service.
I'm thinking about this, but since this is the first time in 15 years that I've had a problem I think I'll wait and see if it happens often enough to aggravate me.
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