Brandon Weiss
New Member
Apologies if this has already been asked (I looked but couldn’t find a good answer).
I’m renovating a one-floor, ~1,500 square foot house into a 4 bedroom, 2 bath. It’s mostly pretty standard fixtures, except there will also be a plumbed steam oven and an outdoor shower. It seems like I’ll need about 30 supply fixture units. I’m planning on using PEX A (Uponor).
If this is relevant, I’m in Santa Cruz which has an average water supply pressure of 90 PSI, so I was planning on putting in a pressure regulating valve to reduce it to 45–55 PSI.
The rough flow order I was planning was:
Meter -> Two hose bibbs -> PRV -> Smart shutoff -> Water softener -> and then branch to cold and hot (tankless)
My water meter is currently 5/8". I’d never heard of that until now but it seems like it’s 5/8" x 3/4", so effectively a 3/4" meter.
According to Terry’s water supply fixture units table or this slightly more detailed one I definitely need a 1" building supply to meet my 30 fixture units, but I’m not quite clear on exactly how to upsize.
How do I upsize off the meter?
I was looking at Uponor’s water meter fittings and they only have two:
Do I just run a short piece of 3/4" PEX off the meter and then use another fitting to convert that to 1" PEX for the rest of the run to the house? Or is there a 1" NPSM to 1" PEX fitting? I looked but I can’t seem to find one if it exists.
Where to reduce from 1" to 3/4"?
This is somewhat related but my water heater has a 3/4" connection so at some point I need to reduce from the 1" building supply line down to 3/4", but I’m not sure where is best to do that.
Do I reduce to 3/4" right before the PRV and use a 3/4" PRV, 3/4" smart shutoff, and 3/4" water softener? Or do I run the 1" supply through a 1" PRV, 1" smart shutoff, and 1" water softener, then reduce to 3/4" then branch to go to the water heater and cold line?
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Thanks so much!
I’m renovating a one-floor, ~1,500 square foot house into a 4 bedroom, 2 bath. It’s mostly pretty standard fixtures, except there will also be a plumbed steam oven and an outdoor shower. It seems like I’ll need about 30 supply fixture units. I’m planning on using PEX A (Uponor).
If this is relevant, I’m in Santa Cruz which has an average water supply pressure of 90 PSI, so I was planning on putting in a pressure regulating valve to reduce it to 45–55 PSI.
The rough flow order I was planning was:
Meter -> Two hose bibbs -> PRV -> Smart shutoff -> Water softener -> and then branch to cold and hot (tankless)
My water meter is currently 5/8". I’d never heard of that until now but it seems like it’s 5/8" x 3/4", so effectively a 3/4" meter.
According to Terry’s water supply fixture units table or this slightly more detailed one I definitely need a 1" building supply to meet my 30 fixture units, but I’m not quite clear on exactly how to upsize.
How do I upsize off the meter?
I was looking at Uponor’s water meter fittings and they only have two:
- 1" NPSM to 3/4" PEX
- 1 1/4" NPSM to 1" PEX
Do I just run a short piece of 3/4" PEX off the meter and then use another fitting to convert that to 1" PEX for the rest of the run to the house? Or is there a 1" NPSM to 1" PEX fitting? I looked but I can’t seem to find one if it exists.
Where to reduce from 1" to 3/4"?
This is somewhat related but my water heater has a 3/4" connection so at some point I need to reduce from the 1" building supply line down to 3/4", but I’m not sure where is best to do that.
Do I reduce to 3/4" right before the PRV and use a 3/4" PRV, 3/4" smart shutoff, and 3/4" water softener? Or do I run the 1" supply through a 1" PRV, 1" smart shutoff, and 1" water softener, then reduce to 3/4" then branch to go to the water heater and cold line?
---
Thanks so much!
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