25-inch internal diameter (ID)

OEM Compatibility: Specifically calibrated for Laars Pennant and Mighty Therm series ignition sequences

It should be replaced every time the pump is pulled for service or if signs of "weeping" appear around the volute housing

ensuring a high-energy spark for consistent combustion in demanding field environments

a "pressure switch stuck open" fault is often the cause

Spartan Valves EP3.5 Replacement Cartridge 320788-703 25-inch internal diameter (ID)Maintain peak hydronic performance with the Spartan Valves EP3. 5 Replacement Cartridge, a critical component for restoring the precision of your control valve body without the need for full valve replacement. As a veteran grade HVAC part, the EP3. 5 simplifies maintenance by allowing you to swap out the internal mechanism of Spartan V200 and V300 series zone valves. This Cv 3. 5 cartridge is engineered for 2 way and 3 way globe valves, featuring a