What is the difference between the H43AB-4 and the H43AB-4C

This model features external pressure equalization via a 1/4-inch flare connection

Standard 120V Electrical Profile: Simplifies installation for technicians by matching standard line voltage requirements for heating systems

eliminating the need to reuse old or potentially faulty electrical components

ASCO 8210G4V Solenoid Valve Els PW 29614 What is the difference betweenThe ASCO 8210G4V Solenoid Valve is a high performance 1 inch NPT solenoid valve engineered for demanding HVACR and industrial applications. This 2 way normally closed valve features a robust brass body and high grade Viton seals (FKM), providing superior chemical resistance and thermal stability compared to standard NBR. Designed as a pilot operated solenoid valve, it delivers a high 13 Cv flow coefficient, ensuring efficient fluid handling with