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The 1/2" fill valve is also available separately from the rest of the kit
Some are parts of the valve assembly: Valve Handle
Arbor with Swing (400lb weight limit)
200 Bio-Balls treats 400 gallons with normal bio-load
Responds quickly and efficiently to rapid changes in ammonia levels
White PVC Spring Check Valves, Female Threaded Ends (FPT) Size:1" FPT The 1/2" fill valve isCheck valves are essential when using a waterfall filter in conjunction with a pond skimmer. The check valve will prevent water in the filter from back flowing into the skimmer when the pump is switched off and keep water in bogs when the pump is turned off and other purposes. Check valves are also essential when an external pump is being used. The check valve prevents the water from draining back into the pond or reservoir, keeping the external pump
