specifically designed for systems requiring a 120V current to reach ignition temperature

Engineered for Trane and American Standard heat pumps

featuring updated internal components while maintaining physical compatibility

Designed with a standard 1/4" barb connection

serving as the 1:1 direct replacement for Barber Colman K-503 and Invensys K-503 models

ASCO 310-523 Rebuild Kit Refrigerant specifically designed for systems requiringThe ASCO 310 523 Rebuild Kit is a professional grade solution designed to restore the peak operational efficiency of your ASCO solenoid valves. Engineered specifically for internal valve maintenance, this comprehensive solenoid valve repair kit contains all the critical wear componentsincluding high quality diaphragm assemblies, resilient O rings, and precision engineered springsrequired to stop leaks and rectify sluggish valve performance. By