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The General Pump PULSAR4KHPMS trapped pressure unloader is perfect for use at up to 4500 PSI. It includes a blue spring, knob, and 16A resistive / 6A inductive load microswitch. Use this unloader to control the flow of water into the bypass port in your pressure washing or pumping setup.
WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm (For more information go to www.p65warnings.ca.gov).