Swing Check Valves are mechanical valves that permit water to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow forces the valve closed.
These install near your skimmer or filter, so if the pump is turned off, it will not back-siphon and dry up.
Also used to help with priming an external pump. Used on the intake to keep water in the pipe.
Filters that have not had water circulating through them for the winter should be cleaned well before turning the pump back on this spring. Cleaning will remove toxins that can develop from waste breaking down in the filter in the absence of oxygen. Once your filter is up and running, seed it with beneficial bacteria.
