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Old 04-09-2012, 06:58 PM   #1
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Shower plumbing questions from a novice


Hello all,

I'm in the middle of a complete gut of our 2nd floor bathroom. The house was built in 1917, and judging by the decor, the upstairs was finished sometime in the 60s or 70s. This is my 2nd bathroom re-do (I did the first floor first), but I didn't have to do much in the way of plumbing the first time around.

I'd like to do as much of the plumbing as I can, but I'm fairly inexperienced. I'm looking to do a custom tile shower with 2 shower heads. The water supplies are 1/2" copper, and the current shower drain is 1 1/2" ABS. I have a fairly new water heater that has a first hour rating of 69 gallons.

Given the above specs for the pipes, drain, and water heater, will I be able to do 2 shower heads, or do I have to stick with one?

My other question is about the fittings and fixtures. How much of the shower plumbing can you build yourself? I saw a house once that had a tile shower with lots of exposed pipe and some industrial-looking gate valves. How difficult would it be to do this sort of thing? What do I need to know before tackling this? (Don't worry about dumbing it down too much )

Thanks in advance for any help.

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Old 04-09-2012, 07:37 PM   #2
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Shower plumbing questions from a novice


A double shower head will require 3/4" feed lines from the water heater and the cold line--

Shower drains need 2" pipe and a vent within five feet of the drain--1 1/2" vent.

My bookmarks have vanished---look through the tile section for a link to building a tiled shower base--

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Old 04-09-2012, 09:17 PM   #3
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Shower plumbing questions from a novice


By doing exposed industrial style plumbing plan on a lower resale value. I do not know anyone that would think that was a great idea.
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Old 04-10-2012, 04:53 PM   #4
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Shower plumbing questions from a novice


If I'm limited to one shower head, that's okay--I don't think I'm ready to replace the supply lines and drain.

As far as the exposed pipe and lowering the resale value, that's not really a concern. I've attached a photo of what I'm talking about. What's got me confused is, where is the valve to prevent scalding in this photo? Did they simply leave it out?
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Old 04-11-2012, 06:05 AM   #5
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Shower plumbing questions from a novice


That's interesting --but there is no way that meets code in the USA ---someones idea of rustic--no anti-scald--no pressure balancing--
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Old 04-11-2012, 09:09 AM   #6
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Shower plumbing questions from a novice


I highly recommend upsizing that drain to 2" whether you're using 2 showerheads or not.

Tiling a shower is a lot of work, and if you cut a corner on something, chances are by murphy's law, you're going to have problems with that 'something'

The drain really needs to be 2".
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Old 04-11-2012, 09:42 AM   #7
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Shower plumbing questions from a novice


I'm onboard with everyone else here.

That drain needs to be 2" regardless of 1 or 2 shower heads.

If your going to tile, do your research. Use proper water proofing membranes. Go with a manufactured drain kit. It is a big investment and leaks are not an option.

As far as the industrial style valves and pipes, don't think it meets code.
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Old 04-11-2012, 09:28 PM   #8
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Shower plumbing questions from a novice


irc states that a 1 1/2 drain can handle up to 5.7 gpm
http://publicecodes.citation.com/ico...2_7_sec009.htm

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