Originally Posted by lovefishys
For some reason it didn't get all over the carpet it went wet behind the tank and down the wall. It looked like a waterfall from the basement. We were going to put a check valve on it but they are all made of metal which will rust an hurt the aquarium and fish over time. The only other solution we could come up with is a butterfly valve which would need to manually be turned in that case.
No they are not all metal, look on Bulk reef supply, you will find PVC
check valves. Also a properly setup sump will allow enough room left in the sump for water to drain down from the return line without overflowing the sump. Once the water level drops below the return in the display then back siphon will break and the draining will stop without flooding your sump. If you have to much water in your sump it will flood.
You should have a max. and min. Water level lines for the sump. Minimum will designate the lowest the water can drop before your return pump runs dry and maximum will designate maximum level the sump can be so that is does not overflow in the event of powerloss.
29g Mixed Reef, 150w 14k Phoenix MH w/ Moonlights, Reef Octopus BH1000 HOB Skimmer, Ecotech Vortech MP10es, ReefKeeper Lite (Plus), PH Probe, Temp Probe, ATO, Carbon/GFO Reactor.