On Wednesday, August 16, 2017 at 6:06:01 PM UTC-4, Ed Pawlowski wrote:
On 8/16/2017 5:15 PM, wrote:
On Wednesday, August 16, 2017 at 4:50:57 PM UTC-4, wrote:
I want a supply line to source from one of two water mains. I was looking at 'y' valves but the ones found all suggest they are 'marine' type (which does or doesn't make a difference). Is there a common Y valve used in home plumbing?

or two regular valves...
if this is potable water,
you should also probably require one or two backflow prevention valves so one source cannot back-feed to the other.

mark


Even if the end use is not potable water, as long as connected to town
water it would be needed.

Plus not enough info. Is it potable water or other? What size?
If it;s the latter and 2" or so in size, there are 3 way pool valves.
And if it's connecting even a potable well system to some other
system, eg irrigation, a backflow preventer would be typically required.