Wabco Air Spring Solenoid Valve Block is a direct replacement for the vehicle’s failing valve block. Solenoid valve block is made of the highest quality materials, such as long-lasting O-rings and electrical components, and is designed to meet or exceed the original equipment. An air spring solenoid valve block is responsible for distributing air from the compressor to your air strings or air springs. Over time, the O-Ringer valve block can dry out debris and leak, causing the compressor to overload or allow moisture to degrade the electrical solenoid components, causing additional problems.