Outdoor Shower Plumbing Backflow??? - Plumbing - DIY Home Improvement | DIYChatroom

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


Thread Tools Display Modes
Old 06-23-2013, 04:35 PM   #1
New Old Home Owner
RHulsmeyer's Avatar
Join Date: Mar 2012
Location: Sag Harbor, NY Suffolk Co
Posts: 17
Rewards Points: 10

outdoor shower plumbing backflow???

Hi all!
Ok, a year later and I have promised The One that this will be the summer where she will shower outdoors in luxury with hot and cold water! Iíve looked at all of the off-the shelf outdoor showers and have decided that I will DIY-it and my design will be rustic and simple made from copper pipe and brass fittings that will be allowed to weather and patina. (See the attached picture as an example.) Instead of a standard shower valve I will use two valves controlling hot and cold flow, that will feed into a common pipe leading to the shower head.
Iíve got all of the easy stuff figured out, including taping into the existing supply lines, running PEX to the outside through an underground conduit, shut-offs and unions for winterizing, waste water drain and tie-ins, etc., etc.. My home is located in New York, Long Island and I am on my own well.
My one big question is do I need some sort of back-flow preventers in the hot and cold lines (see my diagram attached)? I am assuming that there may be some variation in pressure between the hot and cold supply at the combination point and that would cause some flow problems. Is this something that I really need? What product would work? Where in the system should it be installed? Any assistance on this would be helpful. Also any suggestion on valve types would be helpful as well. I want a real common rustic look with a red and blue valve knob for the controls so I donít want to use ball valves in the shower itself.

Thanks for all of your help!
Attached Thumbnails
outdoor shower plumbing backflow???-install-outdoor-shower.jpg   outdoor shower plumbing backflow???-odshowerplumbing.jpg  


RHulsmeyer is offline   Reply With Quote
Old 06-23-2013, 05:37 PM   #2
A "Handy Husband"
rjniles's Avatar
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 7,507
Rewards Points: 4,226

If this job is permitted, you may be required to use an anti-scald shower valve. Backflow is not required. I would use stop & waste valves in the cellar to drain the lines.


Coastal South Carolina
rjniles is online now   Reply With Quote
Old 06-23-2013, 06:25 PM   #3
Join Date: Nov 2011
Location: Hartfield VA
Posts: 34,440
Rewards Points: 14,010

One like this would be legal and you would not have to deal with freeze up and busted pipes.
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
joecaption is online now   Reply With Quote
Old 06-23-2013, 07:52 PM   #4
Join Date: Dec 2011
Location: Winston-Salem NC
Posts: 3,895
Rewards Points: 2,464

Don't fight the wheel.
Use a standard shower/tub mixer with the tub outlet doing the foot wash.
TarheelTerp is offline   Reply With Quote
Old 06-23-2013, 08:46 PM   #5
Join Date: Mar 2013
Location: Ohio
Posts: 4,746
Rewards Points: 2,038

Code usually requires you use a single handle pressure balanced temperature control shower valve. Just install it then remove the cartridge over winter. No back flow required but your local code may desire a shower drain.
Ghostmaker is offline   Reply With Quote
Old 06-23-2013, 10:34 PM   #6
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,924
Rewards Points: 814

You need a valve like Ghostmaker mentioned to meet most codes.
But if you don't want to look at it outside- but it in the basement. Then run a single- mixed line outside.
You can then bullhead a tee for shower and foot spray. The mixer in the basement can be preset for temp. I have done this set up in garages and in kitchen cabinets for exterior hose bibs/showers.
BTW- gate valves are not designed to control volume- but globe and ball valves will


When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote

Thread Tools
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
Peninsula Sink removing Pony wall becomes Island Plumbing? lothia Plumbing 6 04-30-2013 12:13 PM
Need help fast please re hydronic boiler water supply and backflow DanDaMan Plumbing 21 12-22-2010 07:01 PM
ALOT Of Help Needed for Plumbing ~FYE~ Plumbing 4 09-22-2009 12:28 AM
Sewer smell after hooking into plumbing vent daveyd Plumbing 10 08-10-2009 06:25 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1