2” drain + RO waste water.

[mlivvy]

I’m trying to install my RO in the basement. This is the only easily accessible drain I found and its above head coming from the kitchen sink. Can I tap into that 2” pipe? If so, how do I do it? Am I at risk of back siphoning sewer water into the RO?

 

[infinite0180]

I believe you should only tap into drains above a sanitary loop but im not an expert. If you have a laundry sink i would go there with the drain instead...

 

[mlivvy]

No laundry sink the laundry is upstairs. Everything coming to the basement looks the same.

 

[mike550]

Not a plumber. But maybe you can tap into the top of the 2". Reason I say top is that I don't think your 2" pipe is ever really "full" of water. I would put a drain saddle clamp at the top of the 2" and see if water runs out. If it doesn't then you're good to go. I'd also consider a check valve on the RO waste line.

 

[mdb_talon]

It really should to above a trap. I would run the drain line to below the kitchen or bathroom sink and drill a hole through to get up to your sink drain. Then would use pvc adapter above trap to insert drain line. Could also use a saddle valve that may be a bit easier to find and dont need to change any existing plumbing but greater chance of leak

 

[Jekyl]

Don't tap into a line that doesn't have a trap. You will allow gas to backfeed. You don't want that smell, trust me. What about just running the line to a floor drain?

 

[mdb_talon]

Not a plumber. But maybe you can tap into the top of the 2". Reason I say top is that I don't think your 2" pipe is ever really "full" of water. I would put a drain saddle clamp at the top of the 2" and see if water runs out. If it doesn't then you're good to go. I'd also consider a check valve on the RO waste line.

It is not just about flow it is about sewer gases and building codes.

 

[mlivvy]

I've looked. No floor drains. Just a bunch of those 2" drains coming from upstairs into 1 giant pipe going outside.

 

[Jekyl]

I've looked. No floor drains. Just a bunch of those 2" drains coming from upstairs into 1 giant pipe going outside.

There has to be drains in a basement. Usually by your furnace at minimum to deal with the condensation involved.

 

[jpil]

Or a sump pump basin? Gotta be somewhere for the water to go if the basement flooded

 

[Jekyl]

I'm guessing the floor is tiled over if you can't find a drain. Do it yourself specialists often cover the drain without knowing better. Look for a low spot and that's where your drain is.

 

[mlivvy]

I'll look closer for a floor drain today. They did over pour alot of concrete making the floor super high and the ceiling low. I'm guessing if there was a drain its now buried deep.