conduit size for pex

[GSRinmyCRX]

Has anyone run pex in conduit to a detached garage. Looking to run 1/2 pex line, It will have long sweeps no elbows.

What size conduit have you guys used?

Thanks.
Levi

 

[Copymutt]

Have not done so, but do know 1/2” Pex wont provide much flow over distance.

 

[samss]

I ran 3/4" pex inside 1 1/4" pvc to my shop. About 120' with one up swing.

 

[CraigStu]

I wouldn't use conduit unless you are looking at the grey plastic 'conduit'. I'd much prefer PVC to metal underground.

 

[GSRinmyCRX]

1/2 will give me enough flow for a slop sink and hose bib, its not that long of a run.

when I say conduit I mean the grey plastic sch-40 or sch-80 suitable for burying.

Levi

 

[Walkers]

Why not just run PVC?

 

[dcg9381]

I ran 3/4" pex inside 1 1/4" pvc to my shop. About 120' with one up swing.

This. It will "barely" fit in 1" sch 40 electrical pvc with sweeps. I'd recommend 1-1/4".

 

[GSRinmyCRX]

how about 1/2 inch?

 

[dcg9381]

Here you go. Do note that 3/4" PEX is recommended to go in 2" pipe, largely due to typical 90 degree bends. It's different if you put it in electrical conduit with sweeps.

 

[Bert_]

You can use white plastic pipe, it's cheaper. But definitely use electrical 90's. Personally I wouldn't go smaller than 1 1/2" to run a waterline inside of.

Seems weird to bury 1/2" but I suppose it's fine for a sink that's not far away. On the farm I hardly ever see people run even 3/4. Most common size is 1" poly.

 

[65ranchero]

Plumber ran 3) 3/4 " PEX in 4" sch. 40 and I added a coax cable later
( PEX was 1 supply for domestic water to water heater and and wash sink other 2 were supply and return for radiant heat)
Added a another 4" sch.40 for sewer line from garage to basement installed sewer ejector pump and tank.
3rd section of Schedule 40 for future use

 

[jrsavoie]

I've used 3 and 4" slotted and unslotted field tile to run things in.

 

[wes73]

ran 3/4" pex in 2" schedule 40 conduit. I put it in the pipe as I laid it in the trench.

 

[jkuro]

Put in the largest PVC conduit, 3 or 4 inch. Now you can add anything you may want down the road. Pipe is cheap, digging the trench is not.

 

[Innovate1]

I recently ran 1" poly through 2" PVC with electrical sweeps. The AHJ wanted separation between sewer line and water line until they were at least 10' apart and was fine with using conduit sweeps. The inspector also suggested running the 2" up through the slab so if I ever needed to replace it I could pull through another poly line. 2" long sweeps were all that were available locally so that's what I used. I only went about 60' with the 2" until I had enough separation - then direct bury the rest of the way. I would upsize to at least 3/4" but that's just me. If you want more flow for some reason later you don't have to replace the pipe.

 

[jrsavoie]

I also ran 1" black poly line between buildings for air line. It hsd worked great.