Reef Central Online Community - View Single Post - Suggestions on how to SLOW down back siphon from return

mechanix23 · 03/08/2015, 01:51 PM

From your description, it sounds like you're getting air trapped in the impeller. The only choice for prevent that is your number 1 option. The other option is to use an external pump due to lack of sump room and install a backwards check valve at the top of your return. This option will have no-head loss. When you shut the return pump off, the check valve will break the siphon by letting air in. I think I saw this on Melev's Reef. It's on YouTube.

03/08/2015, 01:51 PM	#2
mechanix23 Registered Member Join Date: May 2012 Location: Collinsville, OK Posts: 29	From your description, it sounds like you're getting air trapped in the impeller. The only choice for prevent that is your number 1 option. The other option is to use an external pump due to lack of sump room and install a backwards check valve at the top of your return. This option will have no-head loss. When you shut the return pump off, the check valve will break the siphon by letting air in. I think I saw this on Melev's Reef. It's on YouTube.