Premium Pentair Optimum Positive Seal Diverter Valve's. Positive seal valve's assure maximum flow is maintained for a maximum heating performance.
Pentair Optimum Positive Seal Valves have excellent flow characteristics. They are also manufactured to strict quality standards & never require lubrication!
3-Port valves are used to divert water either to the solar array (turn solar on), or back to the pool (turning solar off).