Dont mind me.

[Aquaduct]

Just cleaning up solved problems.

 

[hj]

copper tubing is quite a bit bigger than CPVC, which is about the same as PEX, (which I would have used if I were not going with copper). I have never seen CPVC installed with "crimp" connections. Are you sure it is not white PEX?

 

[Sponsor]

 

[Aquaduct]

Appreciated.

 

[Reach4]

It all LOOKS like it's going to work... but it's all running 1/2" cpvc.

I see no CPVC pipe in your photo, unless there is some kind of system for CPVC I have not heard of.

 

[Aquaduct]

Thanks

 

[WorthFlorida]

The installation instructions do show 3/4" and 1/2" for the body heads. From your pictures, the valve body should be feed with 3/4" and according to the instructions. With the last foot going from 3/4" to 1/2" is hard to say if a small pressure drop would be a problem. See page 5.

https://assets.hansgrohe.com/mam/celum/celum_assets/16__hruh0754_pdf.pdf

 

[Worksmarternotharder]

That is PEX, not CPVC.

HJ is wrong on sizing, Copper and CPVC are close in size (copper is a little bigger). PEX is smaller than both and the fittings 50% smaller.

With that plastic crimp fitting, and that many of them, its probably going to kill your water pressure. 3/4 pex with those fittings is near 1/2 CPVC or copper.

Don't know what that shower assembly needs for flow, but I would definitely switch to copper or cpvc, maybe 3/4 if it needs the extra flow, but avoid those plastic crimp fittings.

 

[Reach4]

HJ is wrong on sizing, Copper and CPVC are close in size (copper is a little bigger).

Copper and PEX are the same size OD. For 1/2 inch, that size is 5/8 (0.625) inch. The ID of PEX for a given nominal size is significantly smaller.

The ID of your PEX fittings are a lot smaller than for copper fittings.

The differences may not mean much for a single 2.5 gpm regulation showerhead.

 

[Bill Cook]

Aquariusfella, did this design work? I am wanting to do the exact setup, but have concerns about enough volume / pressure for the 4 body sprays on 1 outlet.

 

[Taylorjm]

If you have 3/4" supplying the valve bodies and 1/2" to the outlets, I would think you have to be fine. I'm sure the body sprays and shower heads are very low flow, they would have to be otherwise you would need a huge amount of water flow and pressure to run everything, and you wouldn't be able to run anything else in the house if your taking a shower. Otherwise you would flush a toilet and lose all the body sprays.

 

[Jadnashua]

1/2" copper is good for about 4gpm per the Copper Institute's installation handbook with hot water...a bit more on warm. 3/4" copper is good for about double that. Exceed that, and you start to get dynamic pressure drops that can get excessive, literally wear the pipe out from the inside, and create water flow noises.

Pex can handle more IF it doesn't have lots of fittings and angles. The beauty of pex is that it bends, and other than looks (usually hidden in the wall), you may not need any intermediate fittings. It can look funky with the bends when you're used to nice straight lines and angles of copper.

 

[Taylorjm]

1/2" copper is good for about 4gpm per the Copper Institute's installation handbook with hot water...a bit more on warm. 3/4" copper is good for about double that. Exceed that, and you start to get dynamic pressure drops that can get excessive, literally wear the pipe out from the inside, and create water flow noises.

Pex can handle more IF it doesn't have lots of fittings and angles. The beauty of pex is that it bends, and other than looks (usually hidden in the wall), you may not need any intermediate fittings. It can look funky with the bends when you're used to nice straight lines and angles of copper.

Why would you say Pex can handle more? Unless your going to use 1" pex, it's well known that pex doesn't handle more than copper. Maybe if your comparing 1/2" copper to 3/4" pex.