... ) 6-1 '/ 21, the control valve comprehensive performance(1) BLUEWATER control valves economical efficiencyOne product promotion ... type3, BLUEWATER control valves function option introduction1) bypass valve (Bypassvalve) bypass valve role: to control water softener inflow ... control valves (6600, 6800, 7800, 8600, 8,800) are optional as hot water system (temperature ≤65 °C, 150 ° F). Part time model valve ...