Have watts 210 gas shut off valve on water heater need to have watts 3L preasher reducer valve installed can it go on the cold side or dose it have to be on the hot live in so. Cal. Orange county ca.

Hi Raiderick

As far as I know, it can go either way! I've seen diagrams showing the Watts 3L in both the hot and the cold water supply pipes, so you may be best to call a local plumbing inspector and see what he thinks on this.

Otherwise, with any luck, Milo (from your area) will pop in soon and share his experience on this!

Glad to discuss more if you want...

Mark