dpb wrote:
On 03/09/2015 2:53 AM, gregz wrote:
wrote:
I got a bathroom. I'm adding a second downstairs right below. ...
...
Run from hot water tank 20-25 feet, and cold tap. Still going to use the
1/2 feed from regulator and hot water tank.
...

I think you'll be sorely dissatisfied by the result if there's any
possibility whatsoever the two are being used together. That line needs to go to 3/4"...

--

Second full bathroom. The use of both would be very occasional. I'll have
to think about this a while and look things over. Things do slow down when
any two things are being operated. The house I grew up in didn't have any
fancy piping. I never really noticed a huge problem. The regulator might be
a factor too. I know air compressors regulators limit flow if undersized.

Greg