Universal Mechanical 2 Hour Timer. Mechanically controls charging in timed Mode. Single Pole Single Throw (SPST) Switch rated 15 amperes. Termination is designed to accept Quick Disconnect terminals. Replaces older mechanical timer. (This timer no longer has manual hold mode)

253-436-666 Viper Manifold Check Valve for VR-4550/6000/7000/9000. Fits some older Mastercool and Snap-On Units as well. For Models VR-4500/VR-4550/VR-6000/VR-7000. Check Valve No. 2 and Check Valve No. 3 are located between the oil separator and the storage tank. Reverse leakage in these Check Valves can cause refrigerant to “flood” the oil separator, resulting in poor compressor performance.