Hole size for 1 in. (and ½ and ¾) PEX carrying hot & cold water joist/stud penetration...

[iconoclast hero]

I've spent a ridiculous amount of time and a lot of aggravation trying to find this number. At this point I really need it for 1 in PEX, hot and cold, mainly through joists. The hole I punched through block/brick is plenty big enough.

 

[Jeff H Young]

I use 1 3/8 bit on 1/2 3/4 and 1 inch and use . look up water pipe insulator or trisulator and youll see they take 1 3/8 hole

 

[Sponsor]

 

[iconoclast hero]

I use 1 3/8 bit on 1/2 3/4 and 1 inch and use . look up water pipe insulator or trisulator and youll see they take 1 3/8 hole

I ran about 22', 15' through joists and then through a brick-faced block wall.* It sucked. When I run the hot, I'm usin' 1½ (largest spade bit I have—grateful for my impact driver!).

*I did that with a ca. 2" carbide hole saw in my rotary hammer so it wasn't exactly "precise." I'm wondering if I should change the hot to 65 mm/2.56 in. I don't know if that will be big enough for any kind of insulation.