- Joined
- Dec 14, 2018
- Messages
- 52
- Reaction score
- 18
- What state or country do you live in
- Illinois
Im wondering if anyone has installed a check valve on any of their returns? I am thinking of putting one on my ATO return just in case to break the syphon.Thought an are there valve that don't use rubber flanges since I assume that wouldn't be reef safe !!




