this valve utilizes an A-port with an equal percentage flow characteristic and a modified B-port to ensure consistent common port flow

making it a versatile choice for monitoring low-side system pressures

Always verify your unit's data plate or existing part number before installation

its specifications allow for various applications

technicians should always verify the seat and core integrity before finalizing the refrigerant charge

Resideo L8148E1265 Relay 321042-401 this valve utilizes an A-portThe Resideo L8148E1265 is a professional grade immersion type high limit aquastat relay tailored for residential and light commercial hydronic heating systems. Engineered for vertical mounting, this Tradeline series controller manages both the burner and circulator motors, providing essential high limit protection within an operating temperature range of 180F to 240F. Operating on 120 Vac, the unit features SPST switching action and a fixed