This Brass Unloader Mounting Block gives you flexibility and stability when installing an unloader on your pressure washer. Mount the block directly on your pressure washer frame, truck, or trailer, and attach the unloader to the block. The block will act like a shim. You'll minimize vibration to the pump and unloader and extend the lives of both. The two female ports allow you to connect your unloader on one side and a whipline on the other. Choose from 3/8" and 1/2" FPT ports. Mounting hardware is included. You can use a Brass Unloader Mounting Block with any of the Pressure Actuated Unloader Valves that we offer here at DougRuckerStore.com. Remember to choose your unloader based on the PSI and flow rate of your pressure washer, and be careful not to leave your pressure washer in bypass mode for extended periods to avoid damaging your pump. Are you starting a pressure washing business? Check out my Online Pressure Washing School that will help you drastically cut your learning curve. You can also get some great pressure washing tips and tricks at my YouTube Channel. As always, if you have any questions I can help you with, please use our CONTACT FORM.