System Integrity: Using an authentic Raypak 007400F maintains the original performance profile of your heater

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

Whether you are retrofitting an older boiler or installing a new manifold

having a reliable isolation point is non-negotiable for safety

Versatile Application: Optimized for cooling-only

Resideo L8148E1265 Relay 321042-401 System Integrity: Using an authenticThe 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