Keep your machine running safely and smoothly with the AR21669 Unloader Valve from Annovi Reverberi (AR). Designed with an internal by-pass system, this bolt-on unloader ensures optimal performance and protection for your pump while allowing you to say goodbye to the hassle of bulky by-bass hoses and fittings. When adjusted to your ideal pressure settings, it enters into by-pass mode to release excess pressure in the pump head preventing over-pressurization and providing crucial protection for your system.

The AR21669 Unloader Valve is a perfect fit for Annovi Reverberi (AR) RR, XM, and RK Pump Series, offering a quick and easy bolt-on installation with the included flow through (banjo) bolts. Its 1/2" MPT inlet and 3/8” MPT outlet provide versatility for various hoses and accessories and with a maximum flow rate of 5 gpm and a maximum pressure of 4000 psi, it’s perfect for a variety of pumps within the RR, XM, and RK series.

Need help installing and setting your new AR21669 Unloader Valve? See the videos below from another of our Italian manufacturers, Veloci (MTM Hydro) or see the documents tab for general instructions on setting an unloader valve.