Evolution Aqua 1.5" Single Union Ball Valve United Aquatics Independent laboratory testing confirms that

Independent laboratory testing confirms that the Ultima II filter is superior to three leading bead filter brands in setup

recirculation

Will not inhibit bodily function when used regularly

Model Stream Size Liner Reservoir Spillway Vault Pump Pipe Wt JAF1 7' 10' x 20' 5' x 5' x 2' EWS18 JAFM TH150 2" x 25' 147lb JAF2 11' 10' x 25' 5' x 6' x 2' EWS34 JAFM TH400 2" x 25' 172lb JAF3* 18' 15' x 40' 8' x 10' x 3' EWS50 JAFV TM9500 3" x 33' 430lb JAF4* 30' 20' x 50' 10' x 12' x 3' EWE16 (x4)

long-term durability and easy installation

Evolution Aqua 1.5" Single Union Ball Valve United Aquatics Independent laboratory testing confirms thatBall valves are helpful when trying to regulate pump flow or temporarily restrict flow to work on a pump or filter. They allow you to stop back flow completely while disengaging your pump, or to throttle your flow rate down, or direct water through specific lines. Always restrict the flow at the line discharge and never directly at the pump or on the intake side.