Shower Body Spray Questions

 
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Old 03-04-2009, 08:40 PM   #1
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Shower Body Spray Questions


Hey Guys,


This is not my trade as I enjoy getting "shocked" but need some answers hopefully taken care of by the knowledgeable people on here.

I am in the middle of another bathroom reno and would like to get informed on how my shower is going to work out.
I have not spoken to a plumber as of yet but would like to understand what is going on prior to doing so.
My new shower area is going to be 5' 6 x 40" and will consist of 4 kholer water tiles alongside a hand wand and a ceiling shower head as well.
Now I was originally told I have to upgrade drainage to 2" and water lines to 3/4 from a friend + the water tiles need to be run in a loop system?. I am cool with this but here is where the questions lie.
Will I have sufficient pressure with 3/4" lines to run all 4 wall tiles at once?I am hearing conflicting stories from different people saying that initial pressure will be good then it will die off if I use 3/4???
Each wall tile shells out 2.5gpm (2.5 x 4 = 10gpm) and the ceiling shower head spits out 10gpm as well (4 heads in that).
The house has 3/4" main trunk in and then 1/2 throughout. I am going to upgrade all the 1/2 trunks in the basement to 3/4 and leave the risers at 1/2" except for the specific feed to this shower. That will be 3/4 hot & cold.
As an FYI water pressure in the house is currently 50PSI.
Kohler recommends 3/4 lines for this shower system.
Just looking to get some feedback from anyone who has installed a set up like this for a customer or in their own home.
To add further info to the thread, I have all the diverter valves and a 3/4thermostatic valve needed for the rough in job.
The house currently has a Bosch tankless unit putting out 5gpm.
I don't expect to run everything at once but what can be run???
Maybe the ceiling and hand wand? Just the wand? Just the wall jets?
Basically I would like to know what to look out for in regards to rough in plumbing how it should be routed, issues I might face etc etc etc.
I am a little worried about the tankless unit being a little weak for this set up.




Thanks in advance
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Old 03-05-2009, 06:05 AM   #2
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Re: Shower Body Spray Questions


So you're worried about a 5 gal/min water heater supplying 20 gal/min?

Can you turbocharge the thing?

Sounds to me like you need to go to a brewery or something which is being torn down and buy a 500 gal. kettle. Mount it on the floor above the shower area and plumb it directly into your shower heads. Put about 1/2 cord of wood underneath it and start the fire. In about 3 hours you should be able to take a 25 minute shower. Maybe you won't have to wait that long. Some experimentation is in order. You're sort of out on the frontier of this technology.

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Old 03-05-2009, 06:48 AM   #3
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Re: Shower Body Spray Questions


^^^ Ahhh I see....Anyone around your area sell the kettles?
Better yet...Can you build me one?

Not looking for a 25 minute shower & not worried about a 5.3 gallon a minute heater supplying 20.gpm
I am questioning if the heater will be able to support the shower head at 10gpm or the wall tiles...
As mentioned "I don't expect everything to be run at once"
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Old 03-05-2009, 07:37 AM   #4
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Re: Shower Body Spray Questions


5gpm water heater, 10 gpm head....hmmm...

I think you could run 2 of those showers off that heater
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Old 03-05-2009, 10:27 AM   #5
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Re: Shower Body Spray Questions


I think you are in for some cold showers!! Most projects we do with custom shower systems like the one you describe will require a 60 gallon water heater - I have never put a system in with tankless - not as popular up here in Canada, yet!!

One question, what is the capacity of your thermostatic valve? From what I recall, the Kohler high flow valve maxes out at around 12 gpm, which would be enough for either your body sprays or your ceiling mount shower head.

The following shows a grohe system:
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Old 03-05-2009, 11:51 AM   #6
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Re: Shower Body Spray Questions


^^^ Yeah...I am up in canada.
Got rid of the 60 for the tankless.
Yup...12gpm @ 45psi.

Last edited by Shocked; 03-05-2009 at 11:54 AM.
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Old 03-05-2009, 12:49 PM   #7
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Re: Shower Body Spray Questions


With that GPM I would run 1" to my 1st mixing valve, then ruduce to 3/4" to the next one. One mixing valve won't alow the GPM you need.
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Old 03-05-2009, 02:52 PM   #8
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Re: Shower Body Spray Questions


Quote:
Originally Posted by plumber1a View Post
With that GPM I would run 1" to my 1st mixing valve, then ruduce to 3/4" to the next one. One mixing valve won't alow the GPM you need.

One mixing valve will not allow the gpm I need should I want to "try" and run more than 12gpm.
If I want to only run the rainfall water head I can as that is 10gpm as is the wall jets. Everything would have to be run seperately & not all at once. I think.
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Old 03-06-2009, 08:42 PM   #9
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Re: Shower Body Spray Questions


Quote:
Originally Posted by jarvis design View Post
I think you are in for some cold showers!! Most projects we do with custom shower systems like the one you describe will require a 60 gallon water heater - I have never put a system in with tankless - not as popular up here in Canada, yet!!

One question, what is the capacity of your thermostatic valve? From what I recall, the Kohler high flow valve maxes out at around 12 gpm, which would be enough for either your body sprays or your ceiling mount shower head.

The following shows a grohe system:

That is almost a duplicut of one I did recently in MD.

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