I'm wanting to run Three (3) 3/4" Pex trunk supply lines along the bottom of a 2"X10" dimensional lumber floor joist and be able to branch off via a Tees to the bathrooms where the water is needed. The space is accessible via an open ceiling in the basement, however, there is fiberglass insulation held by plastic sheeting in between the joists that looks to sandwiched by the top of the joist when the subfloor was installed (1975 Keystone modular house). Three supply lines because I'm thinking of running a third, unfiltered, cold line to the toilets and hose bibbs.
I don't have the whole 9 1/4" height of the joist to play with, but I can push the insulation up while nailing the pipe J hook clamps while running the parallel lines. As for the running of the pipes through the Transverse beam that splits the house in half, I don't intend to drill within the top and bottom 2", and I don't have room for three holes in line, maintaining a 2" spacing in between them, so one will be further out.
Questions
1). Do I need to mechanically offset the Tees for the branches running in parallel so that they're not touching each other and causing friction and noise when the water is running, or do I simply give the pipes a little slack and support them with the J hook clamps in a way such that they don't touch? (the J hooks are mechanical fasteners, but nothing like a traditional pipe support with post and loop).
2). Should I just run two lines on one joist and the third across from them on the next joist over?
Thanks in advance for any suggestions and a safe week for all!
I don't have the whole 9 1/4" height of the joist to play with, but I can push the insulation up while nailing the pipe J hook clamps while running the parallel lines. As for the running of the pipes through the Transverse beam that splits the house in half, I don't intend to drill within the top and bottom 2", and I don't have room for three holes in line, maintaining a 2" spacing in between them, so one will be further out.
Questions
1). Do I need to mechanically offset the Tees for the branches running in parallel so that they're not touching each other and causing friction and noise when the water is running, or do I simply give the pipes a little slack and support them with the J hook clamps in a way such that they don't touch? (the J hooks are mechanical fasteners, but nothing like a traditional pipe support with post and loop).
2). Should I just run two lines on one joist and the third across from them on the next joist over?
Thanks in advance for any suggestions and a safe week for all!
