AC condensate line run to sink drain - question

[LargeOrangeFont]

I want to reroute my AC condensate line to the drain in an adjacent bathroom.

It sounds like this should be run before the P trap, in the bathroom drain, correct? I will also run a p trap in the condensate line, before it gets to the drain.

Is this correct? Do I need an airgap or will the sink drain function as one?

Right now my line just runs into my slab and is clogged somewhere. I have tried blowing and sucking it out with limited success, it drains too slowly.

 

[Instigator]

Don't run the condensation line into any kind of drain or vent at all. You will draw sewer gas into the air handler and then the gas will be forced into your house. The condensation may not produce enough moisture to keep the traps full during low or even moderate humidity. You could also pull methane gas into the air handler and cause an explosion. Just run a new line outside. That is the best way.

 

[wsuwrhr]

I have tried blowing and sucking it out with limited success,

Have you tried a different hose? :yikes

 

[wsuwrhr]

Don't run the condensation line into any kind of drain or vent at all. You will draw sewer gas into the air handler and then the gas will be forced into your house. The condensation may not produce enough moisture to keep the traps full during low or even moderate humidity. You could also pull methane gas into the air handler and cause an explosion. Just run a new line outside. That is the best way.

Yeap, 100% no good.

Just run another drain line to the outside somewhere.

 

[COCA COLA COWBOY]

I believe you are supposed to have two drain lines. One outside and another over a window so when the first gets clogged it notifies you have a problem.

 

[LargeOrangeFont]

Don't run the condensation line into any kind of drain or vent at all. You will draw sewer gas into the air handler and then the gas will be forced into your house. The condensation may not produce enough moisture to keep the traps full during low or even moderate humidity. You could also pull methane gas into the air handler and cause an explosion. Just run a new line outside. That is the best way.

That would be impossible if I drained into the sink drain pre P trap.

If I did an air gap into the drain pre P trap every possibility would be eliminated. Same setup as a dishwasher.

 

[LargeOrangeFont]

I believe you are supposed to have two drain lines. One outside and another over a window so when the first gets clogged it notifies you have a problem.

I had 2, one under the house that is partially clogged, and the other into the old water heater pan. I just got a tankless water heater so that is not an option anymore.

 

[Groper]

I believe you are supposed to have two drain lines. One outside and another over a window so when the first gets clogged it notifies you have a problem.

Yes the one over the window is the "Tell Tail" for if the normal system is blocked, you cannot drain condensate into the yard, side yard or ?
It must be drained into the sewer and also before the "P" trap.
You should also have a "P" trap in the normal drain system at the unit with a open vent, the vent is what will over flow onto the pan and then flow out to the line over the window.


Thanks for Looking :rolleyes

 

[Riverbound]

Wtf is going on here? Secondary goes up and over? That's not going to work.

 

[rrrr]

Wtf is going on here? Secondary goes up and over? That's not going to work.

It will when the water gets deep enough.

 

[DLow]

You can run your primary into your sink drain before the trap and it will work just fine, just like in the drawings a couple posts ago. It is typically a smaller hose line, so make sure you clean it out on a yearly basis. You won't have any VOC gas issues. I've had it run this way in my house for years with zero issues. Sometimes it is impossible to run a new drain without doing huge amounts of work. And yeah, that secondary drain line is no good.
My bathroom sink A/C condensation line...

 

[Groper]

Wtf is going on here? Secondary goes up and over? That's not going to work.

Just got this Pic from a search.

Haha you're right this isn't my setup, my secondary is about an inch above the primary.

 

[LargeOrangeFont]

Off to Home Depot and drilling holes through walls!

Thanks guys.

So im going to run a vent to atmosphere on the condensate line at the highest point tie in water heater condensate line, then a p trap in the condensate line, then to under bathroom sink drain, above P trap.

Sound good? I will probably tie into the original as a secondary.

 

[LargeOrangeFont]

Wtf is going on here? Secondary goes up and over? That's not going to work.

Since you have the same house as I do.. where did your condensate line discharge from?

 

[Riverbound]

Since you have the same house as I do.. where did your condensate line discharge from?

Into the bathroom sink. Before the p trap.

 

[Riverbound]

Into the bathroom sink. Before the p trap.

Like this

 

[LargeOrangeFont]

Into the bathroom sink. Before the p trap.

That makes me feel better. Mine goes into the slab and dumps below grade somewhere.. when I redid the concrete, I think they poured right over it.. along with the hot water discharge pipe. I have a feeling they are the same pipe.

Mine will look like that undersink pretty soon.

 

[Riverbound]

That makes me feel better. Mine goes into the slab and dumps below grade somewhere.. when I redid the concrete, I think they poured right over it.. along with the hot water discharge pipe. I have a feeling they are the same pipe.

Mine will look like that undersink pretty soon.

It dumps out the sid of the house on the side yard ( bedroom side)

 

[Flying_Lavey]

Don't run the condensation line into any kind of drain or vent at all. You will draw sewer gas into the air handler and then the gas will be forced into your house. The condensation may not produce enough moisture to keep the traps full during low or even moderate humidity. You could also pull methane gas into the air handler and cause an explosion. Just run a new line outside. That is the best way.

Running the condensate line into a tail piece of a sink is actually one of the best options to drain condensate from. You have a double water seal this way (P trap in the condensate line, and one at the bottom of the sink) so a virtual guarantee of no sewer gas getting into the air stream.

Also, many municipalities will allow condensate tapped into a vent line if it is mechanically pumped as the pump will act as the seal and prevent sewer gas infiltration as well.

 

[Flying_Lavey]

Off to Home Depot and drilling holes through walls!

Thanks guys.

So im going to run a vent to atmosphere on the condensate line at the highest point tie in water heater condensate line, then a p trap in the condensate line, then to under bathroom sink drain, above P trap.

Sound good? I will probably tie into the original as a secondary.

Trap then vent on the condensate always. More important on negative pressure coil systems (package units) but still very helpful on all systems.

 

[boatpi]

My furnace and coil for the remote is in my garage and the outside is 25 feet away so we installed a pump . It takes a condensation line pump it through a half inch clear line into the washer drain has work perfect for 20 years.

 

[Your ad here]

We've ran them to sinks before the traps like posted above. The 2nd drain we always put through the ceiling over a sink.

 

[LargeOrangeFont]

Trap then vent on the condensate always. More important on negative pressure coil systems (package units) but still very helpful on all systems.

Thanks! I just got done modding the sink plumbing. Tomorrow I just have to drill the holes through the wall and then have some fun playing Legos with PVC pipes tomorrow.

 

[LHC Kirby]

We've ran them to sinks before the traps like posted above. The 2nd drain we always put through the ceiling over a sink.

^^^^^ exactly ^^^^^^

 

[milkmoney]

3 pages. U should of hired a union plumber, then 1 page of pics only
[emoji6] [emoji202]

 

[LargeOrangeFont]

3 pages. U should of hired a union plumber, then 1 page of pics only
[emoji6] [emoji202]

I'd be as broke as you if I did that.

 

[PaPaG]

I want to reroute my AC condensate line to the drain in an adjacent bathroom.

It sounds like this should be run before the P trap, in the bathroom drain, correct? I will also run a p trap in the condensate line, before it gets to the drain.

Is this correct? Do I need an airgap or will the sink drain function as one?

Right now my line just runs into my slab and is clogged somewhere. I have tried blowing and sucking it out with limited success, it drains too slowly.

When we owned a property management firm we saw at least 900-1200 apartment and condo units with the same type setup, in ceiling units with condensation drain pipe going through the walls and out the bottom area of the vanity into the Ptrap pipe roughly in the middle of the down pipe. Some of these places were built as early as 1980's and as late as 1993. Not sure if code permitted that after those dates. Worked well but got clogged once in a while and a quick air line through the pipe usually fixed the issues.

 

[LargeOrangeFont]

Finally rounded out this fiasco. Got the clear and cleanable P trap from Amazon a little bit ago. It even came with a bottle brush for it.

My vent to atmosphere is at the highest point, right where it comes out of the AC. Then it drops down and along the back to what you see here.

I left a little extra pipe coming out of the wall under the since because I came in from the side. If I ever remodel the bathroom again, I can slice off the fitting and remove the cabinet easily, and glue on another fitting when I'm done.