Join Date: May 2007
Location: Glen Cove, NY
Thanked 103 Times in 95 Posts
Rep Power: 9
Re: anti siphon valve universal m25
Jim, you're right in that it is an AIR check valve. Most people reading your post, me included, most likely thought you meant a check valve in the WATER line, which we agree does not and should not exist.
Sounds like we agree Stu. Just a question of terminology.