Technicians should verify the seal integrity during any blower assembly maintenance to prevent CO leakage or erratic burner performance

Precision Performance: Maintains consistent room temperature with a tight 1-degree digital accuracy

metal-to-metal seal capable of handling pressures up to 5

including variable speed PV9 2-stage downflow and horizontal models

McDonnell & Miller 339700 Basket Assembly Els PW 17895 Technicians should verify the sealThe McDonnell & Miller 339700 (Model SA21 38R) is a critical strainer basket assembly engineered for high performance integration with Series 21 Make Up Water Feeders. As a veteran grade replacement part, this assembly is vital for maintaining the filtration integrity of boiler systems, effectively trapping sediment and pipe scale before they can foul delicate valve seats or internal float mechanisms. This industrial strength HVAC strainer is also