Run a drain through wall

[Bellaireroad]

I’m going to run a small drain pipe through my garage wall to the exterior. This is for the compressor and air dryer. Is it best to cut the sheet rock, and strap the pipe to a stud, or is there another way to fix it without cutting the sheet rock? Thx


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[The Cobbler]

I would think you just could drill a hole through the sheetrock & exterior and run a pipe out. caulk the outside & inside. plumb up your drain & call it good

 

[PoorOwner]

Use 1.25" hole saw and 3/4" PVC pipe, insert the pipe then glue fitting on both ends. Have a bit of room to run a bit of caulking around it to seal it up.

I have not found straps and brackets made for PVC pipes on the wall, but you will find some PVC electrical conduit straps/brackets fits

 

[CraigStu]

Because of vibration and possible slight movement I would use some soft rubber hose from the drain valve to a piece of pipe solidly mounted through the wall.

 

[matt_i]

I think if you use a "better" tube like Tygon or Synflex, or a hose that's rated for water (I think some of Goodyear industrial hose brands are also good for water, I forget the names in the lineup but AutoGrip was the top of the line/most expensive. Parker also has a competitive line...might be able to find short lengths on ebay) you can fish it between two holes with some skill and a lot of luck (depending on insulation, etc).

I think you need to somehow make sure the hose doesn't have low points where water can pool otherwise life forms will be attracted to it (even ones that don't mind living inside a dark air hose)...

 

[mike93lx]

I'm in the camp of drill through the wall and insert a pipe. I'd do it at a downward angle to stop water from being able to follow the outside of the pipe back into the structure and cover the end of the pipe with mesh to stop it from becoming a spot for bugs/bees/mice to enter.

 

[NUTTSGT]

I used black pipe and connected it to some older air line where it goes through the garage shed. Once it gets to the outer wall it transforms into a piece of brake line.

I don't worry too much about any water laying in it, 150/psi will push alot of things out the other end including any little critters that have decided to make it home.

 

[NUTTSGT]

Fitting through the outside wall.

 

[Bellaireroad]

thanks for all the suggestions . I have an electronic drain for the compressor... it would make for a cleaner installation to attach it to the pipe at the wall instead of the compressor . The cord would not require an extension. So if I go this route, the drain going through the wall needs to be fixed fairly good


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[RDH220]

Use a p-trap to keep critter from wandering in.

 

[mike93lx]

Use a p-trap.

No point. It will get blown empty every time the compressor is drained

 

[NUTTSGT]

Use a p-trap.

Why would you use a P-trap in a drain line for a compressor ?

 

[RDH220]

Trying to think of a way to keep critters out. But as mike93lx pointed out they would likely be on their way unless it was those nasty mud dabbers. They can plug up a cannon. LOL
I guess some screen fine enough to keep the mud boys out. If you go with cpvc I would leave a non glued slip joint outside the structure pointed down so that it can be removed for ice removal. And don't forget your downward plumb through the wall so ice doesn't travel back into the structure.
This is a pic of an ice maker line. It's ten feet long and could make your project very mobile. Of course, you will have to watch your pressure. Just an idea of thing you can do. There are all kinds of line pressure ratings.

 

[KenC]

How about a pipe floor flange? Thread the pipe that goes through the wall extra long so that it will extend far enough through the flange to attach the auto--drain.

locate the flange so that one hole is over the bottom plate and another over a stud. The other two can just be plastic anchors in the drywall.

 

[Falcon67]

No point. It will get blown empty every time the compressor is drained

This. once every couple of weeks open the 1/4 gate valve under the compressor. If there is a critter in there, won't be for long.