Sealco 110700, Spring Brake Control ValveCondition:* New Surplus Stock, In OEM Packaging. Open Box. As Pictured Additional Notes:* The service reservoir priority provides supply air to simultaneously fill the reservoir and release the spring brakes after the internal pressure protection valve opens at approximately 80 psi.* Designed for use with a single reservoir on a typical single or tandem axle trailer* May also be used with two 1,400 cubic inch (nominal) reservoirs on tandem axle trailers* Supply Port: 3/8″ NPT* Control Port: 3/8″ NPT* Reservoir Port: 1/2″ NPT* Delivery Port: 3/8″ NPTSealco 110700