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Boiler room floor drain

branimal

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Joined
May 31, 2016
Messages
1,943
I have a floor drain in my boiler room. It appears to feed to a 2" santee on its back. One side is capped with a rubber fernco. And its outfitted with a strange drain restrictive drain hole. (I have the grate somewhere).

I was doing some work which required me to cut the slab open. (Tie in a rain gutter off broken clay pipe and replace an underground wet return for steam boiler). So there is no-ptrap on this floor drain. Since I have a double trap on my sewer line, sewer smells don't appear to be coming to the boiler room.

The drain works fine. I've shoved a garden hose down there on full blast and it drains fine. The restrictive floor drain does slow things down.

But since I have the slab open, it seems criminal not to cut open a little more and plumb this properly. Maybe there's not enough room b/w the 4" pvc mainline for a p-trap, street 45, and a 4x4x2 wye. I'd have to dig to figure it out. At the very least I should replace the floor drain.

What do you guys think?
 

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wssix99

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Mar 2, 2011
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5,162
Location
Chicago, IL
If you don't smell gas, I would not touch it. Someone has already thought this out professionally and another trap in the system will just be something else to gunk up and cause maintenance issues.

Floor drain traps evaporate and dry out. Your original plumber likely tied this in so you would not need a tap primer:
1772380211326.png

I recall my house has something like this where several share a single down-stream trap. The cluster includes some condensate drains that keep the trap fed.
 
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branimal

Well-known member
Joined
May 31, 2016
Messages
1,943
If you don't smell gas, I would not touch it. Someone has already thought this out professionally and another trap in the system will just be something else to gunk up and cause maintenance issues.

Floor drain traps evaporate and dry out. Your original plumber likely tied this in so you would not need a tap primer:
1772380211326.png

I recall my house has something like this where several share a single down-stream trap. The cluster includes some condensate drains that keep the trap fed.

I forgot to mention there are two 3" floor drains upstream of this one that have ptraps. But I agree that the plumber may have realized there's not enough room to install the proper fittings. I think the 2" santee was installed b/c that's what he had on hand.

Based on the other plumbing work i've discovered here, I don't think a trap seal primer was installed. I could be wrong.
 
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Bert_

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Dec 24, 2016
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9,775
Location
NW Iowa
Can't tell for sure but I'm thinking it's supposed to be a bell trap. You have to have the grate on it for it to actually be a trap.

Seen many of them with the top missing and they wonder why they have sewer gas.
 
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branimal

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May 31, 2016
Messages
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Can't tell for sure but I'm thinking it's supposed to be a bell trap. You have to have the grate on it for it to actually be a trap.

Seen many of them with the top missing and they wonder why they have sewer gas.
I'm not familiar with bell traps. But why would one side be capped?
 
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