Sink supply lines

[Geinig]

I am running new water lines for three sinks. One powder room vanity sink, a garage boot washing sink and running a future line for a possible sink in an upstairs bonus room. So all will not be used at the same time other than very rarely if at all. Can I supply all 3 with one 1/2” pex A line? The space is tight where I am running the lines and a 1/2 line would be easiest but I also want to make sure I am not making a mistake that will cause problems down the road.

 

[Slomoola]

At least he is asking about PEX A. Flows way better than PEX B.

If it was a shower, wife's kitchen faucet or washing machine, different story LOL. I think 1/2" should be fine. Use Boshart sweeping stainless 90's if you have to use 90's. Will keep the flow up. Most lines AT the sink are micro small anyway.

 

[Sponsor]

 

[gillrich]

Supplying all three sinks with one 1/2" PEX A line is possible, but ensure it can handle the combined flow rate without compromising water pressure. Consider peak demand scenarios and consult local building codes. If in doubt, consult a plumber for recommendations. Reading master spas reviews here might be a good idea, they should be able to help you.

 

[Eman85]

I am running new water lines for three sinks. One powder room vanity sink, a garage boot washing sink and running a future line for a possible sink in an upstairs bonus room. So all will not be used at the same time other than very rarely if at all. Can I supply all 3 with one 1/2” pex A line? The space is tight where I am running the lines and a 1/2 line would be easiest but I also want to make sure I am not making a mistake that will cause problems down the road.

I'm not a plumber. You say rarely any of the sinks will run at the same time. The sinks themselves have 3/8" supply lines through a small stop valve so I don't see how you'd have any problems with running 1/2" to feed them.