Xylem 325400 Heavy Duty Gasket No Mounting Holes

Product Description

The XYLEM 325400 is a heavy duty gasket designed for use with McDonnell Miller float-type low water cutoff and water feeder controls. This gasket provides a reliable seal at the connection point between the control body and the boiler or piping assembly, preventing leaks in pressurized hydronic heating systems. It is manufactured without mounting holes, corresponding to the 150-14-HD specification. Licensed plumbers, steam fitters, and HVAC technicians working on hot water and steam boiler systems are the typical installers of this component.

This gasket is used in residential and light commercial hydronic heating and steam boiler applications where McDonnell Miller 150 series low water cutoff controls are installed. It is a replacement sealing component suited for service work when the original gasket is damaged, compressed beyond reuse, or replaced as part of a routine control rebuild or boiler maintenance procedure.

Key Features

• Heavy duty construction for reliable sealing in boiler service environments
• No mounting holes configuration per 150-14-HD specification
• Designed for use with McDonnell Miller 150 series control assemblies
• Replacement-grade fitment for service and maintenance applications

Compatibility

Designed as an OEM-style replacement gasket for McDonnell Miller 150 series float-type low water cutoff and water feeder controls used in hydronic heating and steam boiler systems.

Installation Notes

Installation should be performed by a licensed plumber, steam fitter, or qualified HVAC technician. Before replacing this gasket, shut down the boiler, relieve system pressure, and allow all components to cool completely. Inspect mating surfaces for corrosion or damage before seating the new gasket. Follow applicable local plumbing and mechanical codes when servicing boiler controls.

Technical Specifications

• Series: 150-14-HD
• Mounting Holes: None
• Type: Heavy Duty Gasket

Standard Information

• Brand: XYLEM
• Manufacturer Part Number: 325400