New pex install
#1
08-24-21, 08:37 AM
New pex install
Folks, am going to install pex for my sister inlaws home (presently has Sch40 pvc throughout) and while I understand the "home run" setups I have a few questions..
1) she has 3/4" main to house. I want to keep that to feed the cold water manifold and also the feed to hot water. So can I just tee the line to feed both from main?
2) planning 2 manifolds. (3/4" feed, 1/2" to house) 1 for strictly hot water and the other cold. For the toilets can I tee off the cold line to sinks to feed toilets?
3) looking at the basic manifold most do not come with valves. Do I just cut a small piece of pex, crimp to valve and then crimp to manifold?
Appreciate your advice
1) she has 3/4" main to house. I want to keep that to feed the cold water manifold and also the feed to hot water. So can I just tee the line to feed both from main?
2) planning 2 manifolds. (3/4" feed, 1/2" to house) 1 for strictly hot water and the other cold. For the toilets can I tee off the cold line to sinks to feed toilets?
3) looking at the basic manifold most do not come with valves. Do I just cut a small piece of pex, crimp to valve and then crimp to manifold?
Appreciate your advice
#3
08-31-21, 10:42 AM
I would get a pair of manifolds that have valves already built in. Like this:
https://www.supplyhouse.com/Bluefin-...Free-4-Outlets
But no issue if you want to use a short piece of PEX to a valve. Just more work.
You can also build your own manifold using drop-ear valves. I mount a 2x4 to the wall then screw the valves to the 2x4. Nice and easy.
Of course, you can use standard valves, but the drop-ear allows them to be securely affixed and looks nice.
From there, you can run the pipe however you want. But in general, you want to keep 3/4" from the meter to the cold manifold. Also keep 3/4" into and out of the water heater. Then 1/2" can go to each room. A pair of 1/2" to each bath, a pair to the kitchen, etc. No reason to run two cold lines to the bath for sink/toilet/shower. Unless you're planning a rain-head or multi-head shower, a 1/2" feed to the whole bath will be fine.
https://www.supplyhouse.com/Bluefin-...Free-4-Outlets
But no issue if you want to use a short piece of PEX to a valve. Just more work.
You can also build your own manifold using drop-ear valves. I mount a 2x4 to the wall then screw the valves to the 2x4. Nice and easy.
Of course, you can use standard valves, but the drop-ear allows them to be securely affixed and looks nice.
From there, you can run the pipe however you want. But in general, you want to keep 3/4" from the meter to the cold manifold. Also keep 3/4" into and out of the water heater. Then 1/2" can go to each room. A pair of 1/2" to each bath, a pair to the kitchen, etc. No reason to run two cold lines to the bath for sink/toilet/shower. Unless you're planning a rain-head or multi-head shower, a 1/2" feed to the whole bath will be fine.
#5
09-06-21, 06:28 AM
Member
Which pex type would you recommend? A or B
#6
09-07-21, 10:39 AM
Which pex type would you recommend? A or B.
At the end of the day, I don't think there's a huge benefit of one over the other, any of the PEX systems will work reliably.
