I plumbed my chiller in the garage to my sump using flexible 1" tubing. it is pushed by a Mag 9.5. Since then, I plumbed three valves into the chiller line to do water changes.
Now I want to tap into the chiller line to push in top-off water. I was planning on using a powerhead controlled by a
float valve in the sump.
Check valves are normally open, they only close when there’s a power outage. In this case, the valve needs to stay closed to prevent backflow to the top-off powerhead, but opens when the powerhead comes on to add water to the flow.
Would a regular ½" check valve do the trick or do I need to spring for a pump that doesn’t allow backflow?
The photo shows the water change setup except I used different valves & flexible pipe instead of PVC. I want to tap into the nozzle on the upper left.