Doubledown
Active member
I am re-plumbing my 120 this weekend and wanted to use a check valve on the return line to keep back siphoning to a minimum during shut down. I currently use a combination ball valve/flapper check valve on my 180s, but it only comes in 1.5" and 2" sizes (my return line will be 1") because I run 2 return lines all the way down the back to keep the area behind the rocks clear.
The 2 returns in the 120 will be at the top and already have siphon break holes drilled into them, I was looking for redundancy. Would the check valve on a 120 be needed? The sump is a CPR CY194 (looks to be around 20 gallon or so) with about a 8 gallon reserve space for back-fill during a shut down.
Should I skip the check valve all together and just put a ball valve on for pump cleaning?
Thanks
The 2 returns in the 120 will be at the top and already have siphon break holes drilled into them, I was looking for redundancy. Would the check valve on a 120 be needed? The sump is a CPR CY194 (looks to be around 20 gallon or so) with about a 8 gallon reserve space for back-fill during a shut down.
Should I skip the check valve all together and just put a ball valve on for pump cleaning?
Thanks
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