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Condensate drain questions

mm08822

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Interesting thanks.

Nothing here surprises me outside of the company pushing a installing condensate neutralizer systems for high efficiency gas furnaces very hard -- just to put the condensate in the wastewater system. I am a little skeptical that is necessary for homeowners to (Ph?) treat condensate to release into the into a wastewater/sewer system to make it less acidic. I maybe can see the point a little more if you have a septic tank and a very big air conditioner system draining into it. But it is news to me (I am just a DIY guy though, but also a scientist) if hardly any high efficiency gas furnaces come with a condensate neutralization systems. I very much doubt that little acidic water mixed into the large waste stream will not do any significant harm. I also doubt any modest treatment system is going to remove trace heavy elements (the real problem which will also depend on your system, the gas supply etc) also. This company may be targeting people wanting to be responsible citizens for profit. The money that their customers spend on a such condensate neutralization systems might be better spent on things that potentially matter more and be more doable: Like putting a microplastic filter in a washing machine drain to better keep micro-plastic shards from synthetic clothing out of the waste stream.
Actually, It wasn't in reference to ac condensate, but rather the furnace condensate as they usually combine into one location. The pH could be a concern for components but a small pump and hose isn't too big of a deal to replace if ever needed. Septic systems, maybe, but still not sure of the daily quantity that may go into the septic tank and then it is diluted by all the existing tank water and fresh grey water coming in on top of it.

My point really was, DON"T DRINK IT (as mentioned in above post). Not even sure I would want it on my garden veggies. Flowers ok, but you may find they croaked one day too! A hole in the basement floor has worked well for me for 31 years.
 
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Fav Onefour

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Jul 14, 2022
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711
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MN cold and hot
Interesting thanks.

Nothing here surprises me outside of the company pushing a installing condensate neutralizer systems for high efficiency gas furnaces very hard -- just to put the condensate in the wastewater system. I am a little skeptical that is necessary for homeowners to (Ph?) treat condensate to release into the into a wastewater/sewer system to make it less acidic. I maybe can see the point a little more if you have a septic tank and a very big air conditioner system draining into it. But it is news to me (I am just a DIY guy though, but also a scientist) if hardly any high efficiency gas furnaces come with a condensate neutralization systems. I very much doubt that little acidic water mixed into the large waste stream will not do any significant harm. I also doubt any modest treatment system is going to remove trace heavy elements (the real problem which will also depend on your system, the gas supply etc) also. This company may be targeting people wanting to be responsible citizens for profit. The money that their customers spend on a such condensate neutralization systems might be better spent on things that potentially matter more and be more doable: Like putting a microplastic filter in a washing machine drain to better keep micro-plastic shards from synthetic clothing out of the waste stream.
How old is your main drain plumbing?
The acidic condensate is hard on older cast plumbing. If you still have some of that pipe they may be trying to save you hassle later?
 

rlitman

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Oct 18, 2010
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Long Island
...hardly any high efficiency gas furnaces come with a condensate neutralization systems...
Funny, I've never seen one without. It's just a plastic pipe filled with limestone chips. Nothing special, though many are ungodly overpriced for what they are.
 
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lund

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Michigan
How old is your main drain plumbing?
The acidic condensate is hard on older cast plumbing. If you still have some of that pipe they may be trying to save you hassle later?

The house is 50 years old and has PVC (Schedule 40) drain pipes. The gas furnace has no clear neutralization system. I think the Lennox high-efficiency furnace was installed by the prior owner about 20 ish years ago.

I also have a Cali home that I installed a Rheem/Rudd furnace myself. I am pretty sure that one has no neutralization system for the condensate. That one is also a smaller furnace (small house) with a short PVC exhaust pipe and it seems to blow the water drops out the exhaust pipe (which is fine in the relatively warm Cali climate) so no collected condensate flows back to the furnace to collect into the drain.
 
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lund

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Nov 2, 2019
Messages
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Michigan
Funny, I've never seen one without. It's just a plastic pipe filled with limestone chips. Nothing special, though many are ungodly overpriced for what they are.

I have two homes with ~20 year old high efficiency gas furnaces (Lennox and Rudd) with no neutralization system in either.

A plastic pipe with limestone chips would have to be replaced a lot (consistent with condensate flow and surface area) to work. That sounds like a pain and a potential maintenance problem with crud blockage (which might also inhibit such a design from working).

Maybe there are local regulations in some areas (where you are?) that require some sort of system? Systems would require regular servicing ... analogous to a water softening system.
 
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