Pex installation in basment - under or through joist?

[mbhoag]

I know codes are different in a lot of places, but in general, do pex supply lines need to have holes drilled and go through an unfinished basement ceiling joist, or can they be run under the joist and secured?

I will be running both 3/4 to manifolds for distribution, and 1/2 hot & cold lines to the fixtures on the 1st floor above.

Thanks for the help!

 

[Twowaxhack]

I don’t drill holes unless they’re required. Sounds like your job they’re are not required.

 

[hukre]

It is common to drill holes through joists. General rules are:
Drill them at the center of the joist and don't make them larger than 1/3 the depth of the joist.

 

[Earl Lewis]

I did this and put them through the joists. This gives support and protection, but you need to figure out what works best for your situation.