ST-291 UNLOADER WITH SWITCH 5070 PSI

SKU: 6648

ST-291 UNLOADER WITH SWITCH 5070 PSI is an unloader valve rated up to 5070 PSI. On trigger release it routes pump flow to bypass rather than dead-heading — that's what protects the pump and gives trigger control. Includes a pressure switch for burner and auto-start/shutdown control. Match the unloader to your pump — the GPM range has to cover pump flow and the PSI rating has to meet or beat system max.