Evolution Aqua Dual Union Check Valves Size:2" SLIP The black polyurethane waterfall foam

The black polyurethane waterfall foam is ideal for filling joints and gaps between rocks and boulders

as well as increasing pond clarity

Silica in Bentonite clay binds to and removes harmful toxins

natural repelling power without harming people

Create a dramatic nighttime water feature with this easy-to-use kit

Evolution Aqua Dual Union Check Valves Size:2" SLIP The black polyurethane waterfall foamEvolution Aqua check 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