Thread: Washer Box

Saw this pipe entering the top of the washer box today in a new house. Any ideas what the pipe may be for? It's not the A/C condensate drain or water heater backup pan drain.

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Originally Posted by James Duffin

Any ideas what the pipe may be for? It's not the A/C condensate drain ...

Maybe the a/c secondary condensate drain or from an auxiliary pan drain line?

Is the water heater on the second floor or in the attic. It appears to be the pan drain line or my other guess would be the main condensation drain line that you already discounted.

Oversized pipe for a water softener drain line?

If no expansion tank for the water heater, maybe a pressure relief valve discharge line?

Geez, let's hope not. Besides dangerous, it's the wrong material. I'm thinking you were right before, secondary AC cond. line.

The water heater was in the garage and the secondary drain for the A/C dumped into the backup drain pan with a float switch. No drain from the pan. The main A/C drain went outside. Expansion tank in the crawl space. No water softener installed.

Originally Posted by James Duffin

The water heater was in the garage and the secondary drain for the A/C dumped into the backup drain pan with a float switch. No drain from the pan. The main A/C drain went outside. Expansion tank in the crawl space. No water softener installed.

No secondary drain other than going into a pan under the unit. There should be a drain coming from the pan or the drain line comes out of the unit and then splits off to the drain pan and to the exterior or to a drain such as pictured.

I haven't installed a drain in a secondary pan in years. Most owners won't go into the attic to change filters let alone check their pan and condensate drain periodically. With the improved reliability of the newer pan switches the unit shuts off before the pan overflows causing ceiling damage.

Drain line for washer, where there is light water.
Plumber was originally from Oakridge Tenn. where all the water is heavy.

Originally Posted by Garry Sorrells

Drain line for washer, where there is light water.
Plumber was originally from Oakridge Tenn. where all the water is heavy.

Tritium drain?

I guess now we have to buy Geiger counters!

Originally Posted by David Bell

I haven't installed a drain in a secondary pan in years. Most owners won't go into the attic to change filters let alone check their pan and condensate drain periodically. With the improved reliability of the newer pan switches the unit shuts off before the pan overflows causing ceiling damage.

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Improve reliability ? That is exactly why you should still install a secodary drain pan

I do install a pan, I don't install a drain in them.

Originally Posted by David Bell

I do install a pan, I don't install a drain in them.

I meant drain line from the pan