Commercial plumbing

[Wendell G Boyd]

I’m doing a job that requires 8 new commercial motion sensor toilets and 8 motion faucets. The pressure from main water line coming to the building is around 45psi to 50psi. I am to run 1” water lines for max pressure. I feel I may need more pressure running these commercial toilets. A pressure booster maybe? What’s your thoughts on possible installing a booster. Any information on this kind of system would be greatly appreciated ! I have not installed these before and want to make sure I have some good knowledge before I take it on.

 

[Terry]

If you using flushometer valves for the toilets, there will be a local code for counting backwards on those. It's going to be much bigger than a 1" line for eight toilets and eight sinks.

145 fixture units just for the eight toilets.

https://up.codes/s/sizing-for-flushometer-valves

 

[Sponsor]

 

[WorthFlorida]

The flush valves for the toilets will have a minimum pressure requirement. A Zurn 1.6 gal flushometer requires 25 PSI minimum.

(see page 3)
https://s1.img-b.com/build.com/medi...8/zurn-z6000-ws1-yb-yc-installation-guide.pdf

 

[Reach4]

I think if those flushometers were fed from a precharged pressure tank, as would be used with a well, and that pressure tank were fed via a check valve, it should be able to be deliver a lot of gpm for several flushes.

I expect that is not standard, and a pressure tank, while they normally last a long time, can fail. Also they take space. I am not a pro.