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teachtech 02-08-2008 10:38 AM

Is this too many branches for one pipe?
I am totally renovating my basement bathroom; There is one- 1/2" cold water pipe that goes to the sink, shower and toilet. I would like to run the first floor bathroom toilet to this same pipe. The reason is to sheetrock directly against the ceiling joist in the basement bathroom. Currently the first floor bathroom toilet line is hanging down from the basement bathroom ceiling. It would be easiest to tie into the 1/2" cold water line in the basement bathroom to the first floor bathroom toilet. I hope this makes sense. In other words; a shower, sink and two toilets on one 1/2" pipe, the presssure is very good. Thank you for your advice.

AllanJ 02-08-2008 11:22 AM

You will probably get away with it. It will be rare that both toilets were flushed and therefore refilling at the same time you are also taking a shower.

KUIPORNG 02-08-2008 12:16 PM

I think there is only min considerations for supplies lines... more difficult considerations when it comes to drain pipes....

redline 02-08-2008 01:36 PM

How much pressure do you have?

teachtech 02-08-2008 02:01 PM

I have approximately 60 PSI I think.

Ron The Plumber 02-08-2008 04:22 PM

The answer is too many fixtures on that 1/2" line.

Marlin 02-08-2008 04:52 PM

By code a half inch line can have a maximum of two fixtures. I also try not to let a shower share a half inch line with any fixture not in the same bathroom. The last part isn't code, just something I like to do.

teachtech 02-08-2008 08:52 PM

Thank You
I will do it the right way, thank you for the advice!

dyier 02-08-2008 10:36 PM

I always run 3/4" hot & cold main lines then 1/2" to last fixture on dead end run with 1/2" branch lines to the other fixtures along the way.

biggles 02-11-2008 10:10 PM

you could run as much as you want off the 1/2" pipe just don't use all of them at one time.the whole house is 1/2" after the meter just don't size up even if you start out into the yard keep it 1/2"..toilets only draw on the water when you flush them so that leaves the sink and showers..if somebody is in the shower and you turn the sink cold on you'll hear it...or them.:eek:

Ron The Plumber 02-11-2008 10:23 PM

Do it right or not at all.

Biggles not come on here telling others doing things the wrong way is ok.

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