Atlantic Tirton Check Valves mount to the pump in the Skimmer to maintain water in biological filter and keep beneficial bacteria hydrated. Atlantic's Triton TR215CV Check Valve is the first and only specifically designed for water feature use. Included adapters accommodate multiple pump, skimmer, vault and plumbing options. Single unions above and below the check valve speed removal of the valve and pump for servicing, maintenance and winterizing. Full flow swign valve with inlet and outlet unions and a replaceable gasket. Includes discharge fittings and 2" PVC pipe and tapered insert fitting for metric and ASTM standard tubing. Reversible discharge pipe works with all 1.5" and 2" discharge TidalWave pumps and Atlantic equipment. Molded "perfect-cut" dimensions to identify proper lengths for Atlantic product and cut-to-fit 0.875" increments on the reerse side. Discharge extension for use with taller Atlantic equipment. Maximum assembled height for 23" from the pump discharge to the center of the outlet pipe can be extended to any length using 2" Sch40 pipe and fittings. The TR215CV has a valve dimension of 5.625"L x 3.5"W x 10"H with a 1.5" or 2" MIPT inlet and 1.5" or 2" socket outlet. It has a 3-year warranty.