The Moro USA 3” Pressure/Vacuum Relief Tree Deluxe Kit has a lot to offer. This kit is essential for regulating system vacuum and pressure. With a Vacuum/Pressure Gauge installed in the device, you will easily be able to adjust for your specific application in the field and get the job done effectively. This deluxe kit also includes a diesel flush kit complete with a remote reservoir, a hose, and a metering valve.