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Must I plumb in RO waste in front of P Trap?

B

boontonbob

Hi All - I am looking to rig up my auto top off tonight but wanted to ask for a little advice on a hopefully simple topic first. The instructions on the AWI typhoon says to drain wastewater into the line in front of the P trap. The sink drain I am tapping into is in my basement and I have a pump that pushes the sink’s drainwater up five feet into my main house drain pipe. It's a shame to have to push the wastewater into the pump only to be pumped back up and out, so I am wondering if it would be okay to tap into the line before the drainwater spills into the main house drain?

I think the purpose of the p trap is to collect any nuisance gases from running back into the sink. Is this critical for this application? Come to think of it, I am sure the traps captures carbon monoxide, but will this be an issue to have smalls amounts leak back to the wastewater line on the RO system?

Thanks!
 
D

DaveK

I don't see any real problem with what you plan to do. I did something similar years ago when I lived at another location.

If you are really worried about it, you could install another trap above your main house drain pipe and connect the RO/DI unit's waste water there.

The other thing you could do is save that water and use it to water your lawn or other outside stuff.
 
B

boontonbob

DaveK said:
The other thing you could do is save that water and use it to water your lawn or other outside stuff.
Click to expand...
That's a very good point and I think I may look to do just that. I might start be leaving the RO into the sink basin until I can drill a hole and seal it up around the hose.
I do enjoy my share of gardening and this would work nicely. I'll have to put some kind of basin out back, which is only about 12-15 feet from the sink.
Thanks, Dave
 
jimroth

jimroth

If it's convenient, some people fill up thir washing machine tub with the waste water and use it that way, it works fine. I may jusr route mine out to the lawn, seems a shame to waste it, especially in such hot weather.
 
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