Shower remodel layout. Two Moen Positemp Valves

[cb123]

Currently laying out the plumbing for a shower remodel. Plan is to have two shower heads each controlled by their own valve. 3/4 hot and cold supply available at shower wall. These 3/4 supplies also feed vanity lavatory on opposite side of the wall. Thought is to install a hot and cold PEX manifold from the 3/4 supply to three 1/2 inch feeds to the three devices. Plenty adequate water pressure and GPM. Comments or better ideas?

 

[rjbphd]

You are better of installing two MOENTROL valves for better showering and more water volume. .

 

[Sponsor]

 

[Terry]

1/2" to each from a 3/4" manifold is plenty good.
Shower heads are 2.5 GPF or less, the Posi-Temp puts out 5.0 GPF

 

[cb123]

1/2" to each from a 3/4" manifold is plenty good.
Shower heads are 2.5 GPF or less, the Posi-Temp puts out 5.0 GPF

 

[cb123]

Thanks so much. Planning to use this part. No need for pressure loop or such?

 

[Terry]

Thanks so much. Planning to use this part. No need for pressure loop or such? View attachment 34572

It works fine with that.

 

[hj]

In most cases, pressure loops are strictly cosmetic and serve almost no practical purpose, at least in the normal home installation.

 

[Jadnashua]

If your valve cannot supply the needed volume, a pressure loop won't make it any better! Think of the typical home tree and branch water supply piping...if sized properly, it works to deliver proper volume and pressure everywhere.

Operating pressure drops when the piping is not sized large enough to supply what is being demanded.