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Author:
rafjr64 (CA)
Converted garage to laundry room and playroom for kids. In laundry room I installed 2" abs consisting of a 2.5" stand pipe up the wall then down and 90 degrees out 15' to a dry well. This drain handles two things: 1) softener discharge 2) heat pump water heater condensate. Did not tie into washer drain because it is too far away and I do not have the funds to accomplish this (drywall, etc.).
1) Do I need a P trap in this set up? There is no sewage in this drain but I wonder of the dry well would get smelly? Softener regens 1x per week. Water heater condensate produces 5gal every 3 weeks (slow drip).
1a) If I install a p-trap, Would the water heater condensate (slow drip) eventually drain thru the 2" p-trap once enough water builds up? I guess it would eventually drain, it would just be slower to reach that point because it's a slow drip? Correct?
2) Do I need a vent? I have an air break where the two lines enter the stand pipe. Is this enough air? Does the drywell being gravel and covered with 1' of dirt suffocate the drain pipe and prevent drainage? I may be over-thinking this.
3) Insects - will they come up thru pipe even if end of pipe is surrounded by gravel in the dry well?
I appreciate your help.
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Author:
packy (MA)
it won't take much to put a trap.
as for the vent, you will need one. when the water discharges into the hole, it is displacing air. the air has to go somewhere. it will travel back up the drain and out the vent.
the vent can be a simple 'candy cane'. (two nineties)
the condensate water will flow thru the trap and down the drain just fine
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Author:
rafjr64 (CA)
But if there is an air gap between end of appliance line and start of drain, doesn't that allow enough air? See image here [www.flickr.com]
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Author:
steve (CA)
And what's also in that picture? A vent. The vent needs to be on the outlet side of the trap, so any airflow in or out of the drainage piping does not go through the trap.
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Author:
rafjr64 (CA)
the vertical pipe is open. I was going to put an AAV on it or an inline vent. That be okay.
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