ZK1 Flow Sensitive Unloader 10.8 GPM 3600 PSI 1/2" BSP Male Outlet pressure washer plumbing Should you require a coupler

Should you require a coupler

install a new pump easily

Oil bath lubrication combined with premium quality

Do not use this to install your unloader into your pressure washer or unloader block

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ZK1 Flow Sensitive Unloader 10.8 GPM 3600 PSI 1/2" BSP Male Outlet pressure washer plumbing Should you require a couplerZK1 Flow Sensitive unloader 10. 8 gpm 3600 psi 1 2" BSP M out. The General Pumps newest flow sensitive or flow actuated unloader, the ZK1, is rated for a maximum volume of 10. 8 GPM and a discharge pressure of 3600 psi. This unloader also offers a compact design and can be rebuilt from the top without disturbing surrounding plumbing. The ZK1 is a soft start unloader offering gradual pressure increases, assuring safety for the operator and the pump.