Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-27-2012, 05:13 PM   #1
Member
 
Join Date: Feb 2012
Posts: 34
Rewards Points: 0
Share |
Default

Multiple Shower Head/Water Pressure Question


I am re-doing an old bathroom and installing a larger shower with two shower heads (actually two shower stations, each with a rain head, and several smaller jets on the wall which can be turned on or off).

My question is whether I should run a new hot and cold supply line for the second shower head, or if it sufficient to simply split the existing lines and run them to each head. My concern is that if I split the existing lines I won't have enough pressure to run both heads.

If the recommendation is to run new supply lines, I need to know if it is OK to run plumbing lines horizontally through the wall or if the always need to come straight up underneath the fixture they will connect to.

Thank you very much in advance for any help you can provide.

MikeDobbs is offline   Reply With Quote
Old 02-27-2012, 05:44 PM   #2
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 0
Default

Multiple Shower Head/Water Pressure Question


Hello Mike and welcome to the best darn DIY'r site on the web.

It would be good to know what the existing supply line size is and what is the existing line pressure. Without that its hard to say if you will get enough volume.

Mark

__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
The Following User Says Thank You to Jackofall1 For This Useful Post:
plummen (02-27-2012)
Old 02-27-2012, 06:03 PM   #3
Member
 
Join Date: Feb 2012
Posts: 34
Rewards Points: 0
Default

Multiple Shower Head/Water Pressure Question


Hi Mark- thanks so much for the warm welcome!

The main supply lines running in the basement are 1/2" and are reduced to 1/4" copper lines to feed the existing (old) shower head.

It hadn't occurred to me to check the water pressure although I can say that from my own observations that it is as good or better as anyplace I've ever lived.

I can get to ACE and pick up a pressure gauge in the next few days to measure it directly though- didn't even realize they made those.
MikeDobbs is offline   Reply With Quote
Old 02-27-2012, 06:16 PM   #4
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,350
Rewards Points: 20
Default

Multiple Shower Head/Water Pressure Question


Sounds like somethings wrong already. No way unless someone did something really wrong is a shower head supply 1/4"
Even a sink would have 3/8 supplys.
It will do 0 good to check the pressure. At rest the pressure will always be whatever the the incoming pressure is. It's volume that matters.
If your running two heads I would replace all the supplys with 3/4" it should increase the flow by about 25 %.
joecaption is online now   Reply With Quote
Old 02-27-2012, 06:23 PM   #5
Experienced
 
Jackofall1's Avatar
 
Join Date: Dec 2010
Location: Southern Michigan
Posts: 2,822
Rewards Points: 0
Default

Multiple Shower Head/Water Pressure Question


Quote:
Originally Posted by joecaption View Post
Sounds like somethings wrong already. No way unless someone did something really wrong is a shower head supply 1/4"
Even a sink would have 3/8 supplys.
It will do 0 good to check the pressure. At rest the pressure will always be whatever the the incoming pressure is. It's volume that matters.
If your running two heads I would replace all the supplys with 3/4" it should increase the flow by about 25 %.
Pressure has everything to do with flow, without it you will not have flow.

If the inlet pressure is 75 PSI then you will have approximately 5 GPM @ 60 PSI at the valve assembly, allowing for 30' of 1/2" pipe.

A new shower head is designed to used 2.2 GPM so as you can see, you could run (2) heads with a 1/2" pipe but don't flush the toilet or turn on a tap at the sink.

But for a multihead shower I to would be looking at running a 3/4" up to the shower and then splitting from there.
__________________
When its all said and done there is usually more said than done
Jackofall1 is offline   Reply With Quote
The Following User Says Thank You to Jackofall1 For This Useful Post:
jaydevries (02-27-2012)
Old 02-27-2012, 07:55 PM   #6
Member
 
Join Date: Oct 2011
Location: pa
Posts: 4,329
Rewards Points: 8
Default

Multiple Shower Head/Water Pressure Question


Quote:
Originally Posted by MikeDobbs View Post
I am re-doing an old bathroom and installing a larger shower with two shower heads (actually two shower stations, each with a rain head, and several smaller jets on the wall which can be turned on or off).

My question is whether I should run a new hot and cold supply line for the second shower head, or if it sufficient to simply split the existing lines and run them to each head. My concern is that if I split the existing lines I won't have enough pressure to run both heads.

If the recommendation is to run new supply lines, I need to know if it is OK to run plumbing lines horizontally through the wall or if the always need to come straight up underneath the fixture they will connect to.

Thank you very much in advance for any help you can provide.
before you go any further read the instructions for the shower stations...they have specs as to what is required to run there product after getting the requirments see if house is able to comply with demand???? ben
ben's plumbing is offline   Reply With Quote
Old 02-27-2012, 08:20 PM   #7
Member
 
Join Date: Feb 2012
Posts: 34
Rewards Points: 0
Default

Multiple Shower Head/Water Pressure Question


OK- I feel pretty stupid because I gave the wrong pipe dimensions.

You are correct- the main pipes in the house are 3/4", those are split down to 3/8" to the shower head.

Checking the manual for the shower panels I find:
"2.38 gallons per minute at 43 pounds per square inch (PSI)"
To run both of them I'd want about 5gpm- so would the recommendation be to run new 3/4" supply lines (hot and cold) to the shower and split them just before the connections to the shower panels?

If this is the case- can anyone comment on whether it is permissible to run these supply lines horizontally through the wall? The room I am working in is on a concrete slab, and to run new lines under the ground feels like an imposing job to me. If I can run horizontal through the wall, I can bring the pipe from the basement into the wall, and then run them horizontally to where the shower is.


Thanks to everyone for the help with this- tonight is my first night on the forum and I can see I'll be visiting regularly as I work through this remodel!
MikeDobbs is offline   Reply With Quote
Old 02-27-2012, 08:25 PM   #8
Member
 
Join Date: Oct 2011
Location: pa
Posts: 4,329
Rewards Points: 8
Default

Multiple Shower Head/Water Pressure Question


Quote:
Originally Posted by MikeDobbs View Post
OK- I feel pretty stupid because I gave the wrong pipe dimensions.

You are correct- the main pipes in the house are 3/4", those are split down to 3/8" to the shower head.

Checking the manual for the shower panels I find:
"2.38 gallons per minute at 43 pounds per square inch (PSI)"
To run both of them I'd want about 5gpm- so would the recommendation be to run new 3/4" supply lines (hot and cold) to the shower and split them just before the connections to the shower panels?

If this is the case- can anyone comment on whether it is permissible to run these supply lines horizontally through the wall? The room I am working in is on a concrete slab, and to run new lines under the ground feels like an imposing job to me. If I can run horizontal through the wall, I can bring the pipe from the basement into the wall, and then run them horizontally to where the shower is.


Thanks to everyone for the help with this- tonight is my first night on the forum and I can see I'll be visiting regularly as I work through this remodel!
hey mike don't feel stupid your doing fine...3/4 supply will be fine... yes you can run through wall...you may want to check incoming pressure to be safe...ben
ben's plumbing is offline   Reply With Quote
Old 02-27-2012, 08:27 PM   #9
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,350
Rewards Points: 20
Default

Multiple Shower Head/Water Pressure Question


Still have never once seem a shower head with a 3/8 supply or feed.
1/2" min.
It will work fine being run horizontal.
Feed it with 3/4" lines and split off with 1/2" for the heads.
joecaption is online now   Reply With Quote
Old 02-27-2012, 10:51 PM   #10
Master Plumber
 
Javiles's Avatar
 
Join Date: Dec 2011
Location: Miami Florida
Posts: 1,343
Rewards Points: 6
Default

Multiple Shower Head/Water Pressure Question


Hey guys I think what heís installing is the pre piped shower stations they hang on the wall with the main shower head then a couple of body spray below they rough at Ĺ inch then you would use 3/8 flexible supply lines to connect to the station, so you can pre-pipe then hang on wall. Iíve installed a couple of them donít really care for them. Pressure and volume is still an issue.
__________________


Experience is Knowing what to do next, Skill is knowing how to do it

http://www.americandrain.net
Javiles is offline   Reply With Quote
Old 02-27-2012, 10:55 PM   #11
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,350
Rewards Points: 20
Default

Multiple Shower Head/Water Pressure Question


3/8 supplys to a shower head? Hmm.
joecaption is online now   Reply With Quote
Old 02-27-2012, 11:06 PM   #12
Master Plumber
 
Javiles's Avatar
 
Join Date: Dec 2011
Location: Miami Florida
Posts: 1,343
Rewards Points: 6
Default

Multiple Shower Head/Water Pressure Question


Quote:
Originally Posted by joecaption View Post
3/8 supplys to a shower head? Hmm.
The 3/8 supply the assembly, inside the body it goes to 1/2 inch like i said donít care for them. You can use 3/8 or 5/8 flexible breaded supply 5/8 harder to work with, they recommend 3/8 remember this thing mounts after the finished wall no way to pipe it in from behind after rough,
__________________


Experience is Knowing what to do next, Skill is knowing how to do it

http://www.americandrain.net
Javiles is offline   Reply With Quote
Old 02-27-2012, 11:14 PM   #13
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 26,350
Rewards Points: 20
Default

Multiple Shower Head/Water Pressure Question


If that's what the OP really has that's one poor set up.
Stand on a 3/4" garden hose and see how that works out for you trying to wash your car.

Last edited by joecaption; 02-28-2012 at 09:14 AM.
joecaption is online now   Reply With Quote
Old 02-27-2012, 11:40 PM   #14
Master Plumber
 
Javiles's Avatar
 
Join Date: Dec 2011
Location: Miami Florida
Posts: 1,343
Rewards Points: 6
Default

Multiple Shower Head/Water Pressure Question


I could never understand what people see in them they look like robots in the shower, I mean if your tearing down the shower go with the multi control multi shower heads and body wash heads, this is where the plumber needs to know how to loop and manifold rough.
Attached Images
  

__________________


Experience is Knowing what to do next, Skill is knowing how to do it

http://www.americandrain.net
Javiles is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Furnace pressure switch line/nipple question aparman HVAC 4 12-31-2011 04:27 PM
Question about how to position backerboard for shower Swazzle Remodeling 3 08-03-2010 05:11 AM
Hydronic boiler pressure question. RickInMissouri HVAC 1 01-23-2010 04:57 AM
multiple shower heads mbrewmeister Plumbing 1 05-29-2009 06:04 AM
water pressure in shower issues sflamedic Plumbing 8 04-07-2009 01:55 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.