Supply to Double Sink Vanity and Shower... and Shower Hardware

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G Robert

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Hello, thanks in advance for the opportunity to do this...

I'm enlarging and remodeling a bath and had to change just about everything.
I think I'm good with the drains, but will probably come up with a question or two on that.

Two issues I'm currently dealing with are the supply lines to the sink and shower, and the shower fixtures.

Supply line questions:
As per drawings, which plan is better?
Should any sections be 3/4" even though the supply to the area is 1/2"?

Shower fixtures:
I want a "rain-type" shower head on the ceiling, and a hand-held sprayer (no bar) on the wall with the necessary controls also on the wall - no little individual jets. Also, I want separate items - not a panel. I haven't made any headway with this plan. Any suggestions on very reliable brands to look at or any important considerations when combining the individual items would be appreciated.
 

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Shacko

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>>>Supply line questions:
As per drawings, which plan is better?
Should any sections be 3/4" even though the supply to the area is 1/2"?<<<

Your supply should be 3/4in. if you run 1/2in. theres's good chance you will end up without enough volume for your shower.

Water pipe sizing
 
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hj

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The two drawings are exactly the same. Which one you use depends on which one makes it easier to install the piping. If you use all 1/2" you could lose volume in the shower if someone turns on one of the lavatories, but any increase in size would have occur BEFORE the three items are connected together.
 

G Robert

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Thanks Guys,

How about this alternative - another set of risers (not sure about this term) for the shower?

The ball valve indications in the floor plan I posted (which is the second floor) are the current end of a set of 1/2" risers coming up from the main lines that run along the underside of my first floor joist platform. These two risers first serve a sink, shower and toilet in the first floor bathroom, then continue upward to the second floor bathroom shown in the floor plan. Seems like a good bit of this arrangement would need to be completely re-done to address the issue. Mucho destruction.

What if I connect only the two sinks of the double vanity in the second floor bathroom to this line, and then use a new and separate set of risers connected to the mains a few feet upstream to go all the way up to the second floor to serve only the shower? Due to the general layout of things, this approach is a piece of cake in comparison.
 
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