jefff
New Member
I've been doing my research to repipe some or all of my fixtures to home runs as I renovate the basement. Part of which included this presentation: https://www1.eere.energy.gov/solar/pdfs/sda_saving_water.pdf
I have a 3/4" copper trunk branching mostly to 1/2" copper and some galvanized remnants. There is a high flow shower feed that is 3/4" hot and cold pex that runs through uninsulated space.
My priorities include:
My plan for the hot side is existing 3/4" copper to the heater, run the HW tank at high temp to increase capacity, this honeywell mixing valve to bring supply down to about 120F, to 3/4" uponor PEX, and through two of these Uponor logic manifolds on a tee. Then 1/2" shortest-distance runs to each hot water fixture. I wan't to bring pex out of the wall to a pex stop valve to eliminate connections in the wall.
When I do my work, should I bother replacing any of the cold, or have a simple branch system to save complexity? I don't see a benefit to the home run system for cold supply except to have matching hot/cold lines that are easy to trace. Prove me wrong?
Additionally - what is the best way to attach the stubbed out pex at the wall without tearing into plaster/lath? I'll have a bend support, but I'm looking for something like an old-work electrical box that would attach to the plaster itself, not a supporting strap that I'll have to cut out a stud bay and patch.
I have a 3/4" copper trunk branching mostly to 1/2" copper and some galvanized remnants. There is a high flow shower feed that is 3/4" hot and cold pex that runs through uninsulated space.
My priorities include:
- Fast delivery of hot water to fixtures
- Tempering valve to prevent scalding temps in pipes while letting my heater run at ~140
- Not much energy waste
My plan for the hot side is existing 3/4" copper to the heater, run the HW tank at high temp to increase capacity, this honeywell mixing valve to bring supply down to about 120F, to 3/4" uponor PEX, and through two of these Uponor logic manifolds on a tee. Then 1/2" shortest-distance runs to each hot water fixture. I wan't to bring pex out of the wall to a pex stop valve to eliminate connections in the wall.
When I do my work, should I bother replacing any of the cold, or have a simple branch system to save complexity? I don't see a benefit to the home run system for cold supply except to have matching hot/cold lines that are easy to trace. Prove me wrong?
Additionally - what is the best way to attach the stubbed out pex at the wall without tearing into plaster/lath? I'll have a bend support, but I'm looking for something like an old-work electrical box that would attach to the plaster itself, not a supporting strap that I'll have to cut out a stud bay and patch.