Why you need a P trap
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- Опубликовано: 7 фев 2025
- Goodman packaged unit p trap tip. I've soon too many HVAC companies install these roof top units with no p trap on the drain. It won't drain properly without it! I hope this video gets to those who are not installing a trap. Anytime you install a condensate drain line on a negative pressure side of HVAC system you need to install a p trap.
Thank you for watching!!
We service the area between 5, 210 and 605 FWY here in Southern California. As of right now we only service residential homes and not commercial. Please feel free to contact us with any questions regarding this video.
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Great Tip . Cool little video
The beer bottle 🤣🤣
Some Goodman and Rheem units already come with a P-trap on the inside. Make sure you dont add a ptrap to those units. One p-trap is enough
We are talking a.c. condensate not furnace condensate
I was talking AC condensate also. Nobody said nothing about a furnace.
This is very good info 👍
So confused about the P trap. We bought our 2-story condo with an AC in a closet at the top of the stairs. A white PVC pipe comes out of it that angles down and out of sight. That PVC pipe has one of those shut off floats cut into it, but no P trap. Another pipe comes out which is covered in a black pool noodle cover, heads along a parallel path with the PVC pipe but at a height above it. Again, no P traps. Was this old school, or incompetent work? The AC works with no leaks. Do all ACs need this P trap? The shut off float I described is also the only way to pour in vinegar or bleach to clean the drain pipe. Does that matter?
If it's positive pressure it will run fine. Send me a picture.
theaircoguy@gmail.com
I assume the P-Trap fills itself or did you have to pour water in ?
I let it fill itself.
@@theairconditioningguy thank you
You're supposed to prime it but I rarely do it. And when I do it's only when the drain is in the negative pressure side. Hope that helps! 🙂👍
@@theairconditioningguy 👍thanks again!!
Your video gave the answer I was looking for, thanks so much. Quick question about the vent for the drain: cap or no-cap?. Really appreciate your thoughts.
Thank you for watching? No cap.
@@theairconditioningguy , does it make sense that the vent drain shows water almost to the top yet still draining properly outside?
Thank you
Thank you!
Hello on the goodman a/c if you to use a piston do you always one that comes with condenser or one on the air handler?
Condenser. Thank you for watching!
Does the unit need a vent for the drain after the p trap?
Yes
@@theairconditioningguy why
It allows fresh air into the drain pipe to help water flow smoothly through it.
@@theairconditioningguy thank you for the explanation. I'm doing a similar setup right now although my system is positive pressure and a vent is not technically required. Having multiple access points does help when it comes time to clean up the drain line, so no regrets here 👍
@@theairconditioningguy Sorry one last thing - does the P trap have to be level ? Or is it suppose to be slightly angled like the rest of the line?
What happens when it rains? Does it cause a problem on the open part of pipe
Nothing, pipe hole is too small and any water that did enter would run down the drain.
myfurnace guy said i need a p trap on the furnace - so, do you need one on ac AND furnace? Furnace trap would be inside and yours showed outside.
This was for a packaged unit. Different scenario. Not sure why I didn't see my comments for like 5 months. Think maybe a RUclips bug
Looks like they glued the threaded fitting, is that common ?
Sadly some glue it. It's not what I do. I use Teflon tape.
We use Teflon on the male fitting then use glue an primer
There you go. That's the correct way. 😎👍 You don't glue the male fitting into the drain pan.
What do you use to adhere the pressure treated wood holding the pvc pipe to the roof?
Roof cement
Thank you so much! Great videos. Do you service Long Beach area or can recommend a good HVAC guy? I did the condensate drain just like in your video. But condensation is coming out of the corners of the York unit. Is that normal or ok? It’s also coming outta the drain hole too.Thanks so much!
@timothystewart3431 Not normal. I don't have anyone I know that services that area I'm sorry. Have you tried vacuuming the other end of your drain line? With wet dry vacuum. You need to tape the vent on the drain before vacuuming it. It's the PVC T right after it exits the coil.
I will try that! Thanks dude!
Do you mean the T that has the orange cap in your video? The drain line I installed is brand new and I made it just like the one in your video with the trap. Made the vent pipe a few inches taller than the height of the drain hole on the unit. If you say to vacuum it, are suggesting to vacuum the pvc drain that lays on the roof or the pan inside the AC unit? Thanks for your help!
My house unit which is a duel fuel heat pump. If the heat pump can't bring it to the set temp. then the gas kicks on. Anyway the blower unit is under the house in the crawl space and I noticed water on top of the plastic. The unit is dripping water instead of it coming out the drain pipe. I opened the clean out port and poured water in it and it drained out and it doesn't look like it is clogged where it connects to the unit. Any ideals? It does have the trap and it has about a twelve foot straight run to the outside which to me doesn't look like it drops much but the bottle of water I poured in drained out. Thanks for any help.
The unit is probably not level or might need to be slightly tilted so that the water runs towards the drain hole.
@@theairconditioningguy Thanks I will look at it. Also I noticed it doesn't have the vent pipe that you installed after the P trap. Could that be the problem?
It would help so install it if possible but I'd focus first on leveling it.
@@theairconditioningguy Ok, thanks
I don't understand how the suction occurs. If water was draining out of the conditioning unit I would assume there would be pressure not suction.
I just need a better explanation because I don't quite understand where the suction comes from.
One side of the system blows air in to the ducts. The other half has negative pressure or vacuum. That's why the water gets sucked back in. If you put a trap it will help stop the water from returning into the system. The trap will create a trap or barrier that won't allow the water to get sucked back in.
I have an indoor electric furnace which doesn't seem to drain much water I noticed my p trap is located below the furnace not right where the condensation line comes out. Van I send you a picture so you could give me your opinion on what you think
theaircoguy@gmail.com
Cool little video brother. But why you wear mask when you are alone by the rooftop?
Ha ha! I probably forgot I was wearing it. Sometimes I'm driving with my wife running errands and she reminds me, "you can take your mask off now" 😷 🤣👍
@@theairconditioningguy you didn't forget you were wearing it because at 2:17 you said "wear your mask" 😂
😷👍
If i remove trap and I put long Straight pipe.. ist okay?
I wouldn’t. I’m installing a p-trap as this is what I blasted out yesterday as the p-trap is missing. I’m in very humid and hot Florida twitter.com/ar4star/status/1310179174200549379?s=21
Not on this model. If it's on negative pressure side you have to put a trap otherwise the water will mostly drain when the unit turns off. But if it's on the positive side then you could do that. The way you know is if the unit is running and you feel suction from the pipe then it's negative pressure and vice versa.
I don't have a trap on my 12 foot drain line. It's a rooftop combo furnace/AC unit with a slight drop of maybe 2 inches on the 12 feet of drain. I am in Southern Arizona with very little humidity. It drains just fine. Is it working because the unit doesn't have to remove humidity?
Maybe it's on the positive pressure side and yes less humidity building up will buy you some time before it overflows. To check if it's on the positive side put your hand over the tee or end of the pipe when it's running. If you feel Air coming out when it's running then it's fine. If you feel suction them you'll need a trap.
@@theairconditioningguy Thanks for the info, I will try that. The house is very airtight so even on 105 degree days it shuts off for a good while. That may be all the time it needs to drain the pan ?
No economizer F/A hood?
Nope. Return is also grossly undersized. I didn't install it. They just want pm from me. I've yet to get paid for that drain correction. I did it without permission. Hopefully they'll pay.
@@theairconditioningguyyou did the right thing. Great work as always.
Write it as part of the pm, getting the water out improves efficiency, as per maintenance.
My unit does not have a p trap and it drains just fine ....
@@ACommenterOnRUclips Might already have a trap on the inside or drains through the positive pressure side
@@theairconditioningguy very doubtful there is a trap inside the unit, i opened it years ago to change out the fan and the drain line is right there at the bottom of the pan.
@@ACommenterOnRUclips Then it must be in the positive pressure side
@@theairconditioningguy vs the negative side because there is no other place for a drain line
If air is getting sucked in then it's the negative side. If it doesn't have a trap then it's probably building up extra water before it's heavy enough to drain.
Darn u kick ass
Appreciate you watching!
The Gas packs are different
With the costgard condensate drain seal you will never need a p trap again
I'll look it up, thank you! 👍
I have a question about regular drain lines coming out of the wall to the ground. Is it necessary to have 4 90's for a drain line? Reason I ask is i work for an HVAC company but someone put 4 90s like crazy for the drain lines and was told they need to face up but it causes them to get clogged....what the fuck?
It sounds like they are creating a trap outside. Is that correct? Send me a picture if you can. Maybe they think it's easier to service outside. If I remember correctly the manufacturer of the evaporator coil wants the trap within like 7 out 8 inches of the drain hole, I can't remember exactly. The purpose of the p trap is to stop the transfer of air. If it's on the negative side of pressure the drain will not drain easily. The water will get sucked in. But if it's on the positive side you also want a p trap so that the air doesn't leak.
You left your Corona beer.
🤣🤣👍
Sorry didn't understand. Plz explain without assuming we r already experts else what's the point of us coming here :)
Sorry, I just read your question. On the negative side of the system there is a vacuum that will suck up the condensate water. It won't let it exit the unit unless you put a trap outside to break the vacuum.
If you couldn't figure out what he was saying, you shouldn't be working on your AC.
that can be the WRONG trap if the unit is larger tons.
Really? Explain please. I only work on units up to 5 tons.
@@theairconditioningguy th higher the static pressure the deeper the trap needs to be. The trap should be a MIN of 3" deep from the top of the outfloow to the bottom of the trap. The bigger the under the deeper the P trap needs to be. That trap you used is very shallow. Im not an ac guy BUT I only use my OWn trap I build or buy that is much deeper than that.
Makes sense, these traps work good on these units. But thank you for the information. Always learning here.
Mask outside! Masks don’t work anyway but wearing outside and nobody around lol hilarious
You don't wear a mask when changing air filters?
@@theairconditioningguy no ...
I liked you until you said wear your mask.
Sorry 😞😷
@@theairconditioningguy I still like your work. thanks.
@@fredost1504 Trump is going to prison!! 😂😂🤣🤣😘😘😍😍🦴🦴🦴🦴🦴🦴
Wearing a mask makes if somewhat difficult to understand what you are saying, why are you wearing a mask anyhow, high up on a roof all by yourself? Here in Florida we rarely wear masks except for immune system issues . I saw at the beach last week, high school ages kids wearing masks while they were in 3-4 ft of water, no one else around. Hand washing is much more important as wearing a soggy linen mask for 12 hours. Anyhow thanks for the video on evaporator coil running in negative pressure horizontal box and P trap.
Just got use to it I guess.
Shut the f up if he wants to wear a mask is a free country idiot
Trump is going to prison!! 😂😂🤣🤣😘😘😍😍🦴🦴🦴🦴🦴🦴
I can hear him just fine stop being a nitpicking sally!!!
Maga🇺🇸
Gonna get sick wearing that mask
I put it on to replace their filter. I often forget to take it off. 😷 I did hear someone say that. Not sure if it's true. I've worked for hours and hours in attics with my mask on. For two decades. Haven't felt sick from it yet. N95 and the filtered masks with the filters on the side is what I usually use.
The Air Conditioning Guy yea I’m just messing around I have trouble breathing through them I usually only wear when dust/insulation is bad
😎👍
@@Seedavis397 Trump is going to prison!! 😂😂🤣🤣😘😘😍😍🦴🦴🦴🦴🦴🦴
Don’t even tell me to wear a mask cuz
It's annoying I know.
And since you’re in the trades, check with OSHA to see how fine of particles those masked can protect you from.
Then you will learn that masks are useless to the microns of a virus such as Covid 19
@@columbusmotorhead596 Trump is going to prison!! 😂😂🤣🤣😘😘😍😍🦴🦴🦴🦴🦴🦴