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Was it really necessary to run that much pvc for the drain? If the trap wasn't tilted so much, it would drain better (provided it wasn't draining into a long pipe run). I understand your point about a "tee" (siphon break), but only due to gravity pulling all water out of trap in a long run of pipe. What's the chance that the pvc will be broken in the next yerar or so?

Why is an air vent required after a P-trap?
Not knowing that is exactly why -- over the years -- I've had to fix so many water leaks on other people's installs.

I've done it myself. I once installed a 10-ton Trane split in a warehouse and forgot to put a T after the p-trap. The unit won't drain. We flooded the warehouse. Luckily eveyrthing was up on palettes

-- think of a straw in a glass of water. Put your thumb over it. Pick it up. Why doesn't the water drain? Negative air pressure is stronger than the weight of the water.

In the case of an A/C -- the blower creates the negative pressure in the straw (PVC drain line).

I can't tell you how many water damaged homes I've seen due to the lack of an air vent after a trap. Or, if you put the air vent before the trap, the unit won't drain either. Or, if you don't put a trap or an air vent at all.

Every plumbing fixture in your house has or shares an air vent that sticks up out of the roof, so they can drain. Otherwise the water would stick in the pipes and not drain, against the laws of gravity.

Common problem here.

Who uses adjustable elbows and snap-lock pipe on a roof?

Originally Posted by -459FZPE

I like the grade A set up of that black wire...

Do you mean thermostat cable?

Originally Posted by Wolfer

Even after a heavy rain humidity is only 29%.

It's 01:30, it has not rained in 24 hours, take a look at the humidity and dew points:

Originally Posted by rifter1

There is no "T" after the P-trap, the unit does not drain when it's humid, and the condensate overflows into the Return. It then follows all that nice long, waterproof Return ductwork into the home. Fun fun.

Even after a heavy rain humidity is only 29%.

Originally Posted by rifter1

There is no "T" after the P-trap, the unit does not drain when it's humid, and the condensate overflows into the Return. It then follows all that nice long, waterproof Return ductwork into the home. Fun fun.

why is the T necessary

There is no "T" after the P-trap, the unit does not drain when it's humid, and the condensate overflows into the Return. It then follows all that nice long, waterproof Return ductwork into the home. Fun fun.

Would it be that the return air duct has no poopie on the seams? So its leaking through the return air vent?

I like the grade A set up of that black wire...

It looks like some small, condensating ductwork that is piped down at 1/8" per foot into the house to me

What's the answer!!??

Originally Posted by stltechfrmtx

?????condensation would be on the outside of the pipe???? drain has a trap, low voltage is run on the outside of the unit. return air seams arent sealed (not that I can see)???? got me, could be a number of things

I was thinking that, like a cup of ice and drink. Still in school but I couldnt see any thing else.

So whats the answer already?

Thats one of those dehumidification systems, cause contrary to popular belief it's not always a "Dry Heat"

I'd say around 40 ST and Broadway

Supply (round) duct at roofline? Looks like the male end pointing down into the female duct connection at roof line. Are the supports to the round duct nailed/screwed into roof or just free-standing?

Thats purty, I would have painted it to match the sideing, BTW thats why it's leaking it just needs a fresh coat of pait. Maybe pink to match the pink flamingos in the lawn

?????condensation would be on the outside of the pipe???? drain has a trap, low voltage is run on the outside of the unit. return air seams arent sealed (not that I can see)???? got me, could be a number of things

Originally Posted by cotechinvegas

Could it be leaking at the T-stat???

Break or cut in the t'stat wire drawing the water by capillary action to leak at the thermostat is very possible. Besides look at the ductwork. It's shiny. Shiny stuff don't leak.

He didn't say whether on not it only leaks when it rains. Plenty of places it shoould leak, though.

Could it be leaking at the T-stat???