Conduit sleeve size for PEX pipe?

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JoeJee

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Does anyone have a chart for what PVC sleeve size to use for different sized PEX pipe? What about with insulation? I know non-insulated 3/4 PEX can go through 2” PVC easily. What about 1” and 1-1/4? Figured this would help me and others when preparing for slab penetrations.


pex-sizes.jpg
 

JAYROD_co

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I'm not sure about exact size but I just went through this at the plumbing store last week. He recommended for my 1 inch water line coming into the house 2 inch PVC. I had some extra three though so used that for the sleeve and 90 up instead. The 1 inch went through the 1/4 90 elbow with not much problem. I'm think 2 inch would have been a little more stress on it. However I didn't have enough 45s left so I just 90 straight up to the hot water heater. 2 inch with a smaller angle going up would have worked just fine.
 

John Gayewski

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PEX is copper tube size. Copper tube size is the inside diameter plus 1/8th inch. So 3/4" PEX is 7/8" plus whatever type of insulation you get and there are many types. So you might have 1/2" insulation on each side of the pipe so you'd end up with 1-7/8" OD total. Meaning 2 PVC (sched 40) would work.

A chart for this plumbing knowledge would probably just be more confusing than knowing how it works. Seeing as insulation isn't standard.
 

Jeff H Young

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Jojee, its just simple addition tell us what thickness insulation you are using
 

JoeJee

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…. I like charts. Easy for me to reference. I have a hard time understanding that charts could be confusing but I am a bit of a numbers/organization fanatic when it comes to work….

We will be pulling 1/2” all the way up to 1-1/4” PEX from under the slab. Will use long sweep 90’s.

Other than none to 3/8 insulation on cold line, I don’t really know what size insulation will be used on hot line. Main reason is what will be available from the suppliers. I would like 3/4 for hot but availability and cost is tough compared to 1/2. Even 1/2 has had some trouble here.

John Gayewski, have you pulled 3/4 insulated PEX through a 2” PVC pipe? I fear that the first fitting or worse the first long sweep 90 would cause all kinds of frustration. I must say that I have NOT pulled insulated PEX through 2” but uninsulated pulls fine.
 

Jeff H Young

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your planning on using PVC DWV long sweeps ? I've never done it might be pretty tight 1 inch and 1-1/4 probably going to need 3 inch I was thinking electrical sweeps
 

JoeJee

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your planning on using pvc dwv long sweeps ? ive never done it might be pretty tight 1 inch and 1 1/4 probebly going to need 3 inch I was thinking electical sweeps
As long as I can skip it past the inspector, I will use electrical conduit long sweeps. Figured 1-1/4 would be the fun one. Can’t have junctions below slab so have to come up. That thick pipe doesn’t like to bend very easily.
 

John Gayewski

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I've pulled 3/4 pipe through electrical conduit. But not a great distance and only one 90 also no insulation when I did it. I didn't even do it "after the fact". I did it while everything was exposed and the hole was open. I wouldn't recommend someone trying this unless they know what they are doing.
 
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