the 1171901 serves as a direct OEM HVAC replacement part

Aside from physical damage during a motor change-out

the polyester media is designed to be cleaned with mild soap and water or low-pressure air

the 93-HDLS utilizes a robust mechanical float-operated mechanism to provide reliable boiler pump control and essential low-water protection

Caleffi ZVR104 Relay 319852-301 the 1171901 serves as aThe Caleffi ZVR104 is a professional grade 4 zone valve relay designed for precise control of hydronic heating systems. Serving as a direct HPZC104 replacement, this multi zone controller manages up to four zone valves and features priority zoning functionality, allowing a single zone to be designated for domestic hot water (DHW) production. Engineered with a multi pin selectable priority option, the ZVR104 ensures that space heating loads are