Xylem 302500 Sylphon Base Gasket Low Water Cut Off

Product Description

The XYLEM 302500 is a replacement sylphon base gasket designed for use with E-28 and 63 Series low water cut off controls. This gasket seals the base of the sylphon assembly, maintaining pressure integrity and preventing leaks at the mounting interface. It is a direct service part used by licensed boiler technicians and HVAC mechanics performing maintenance or repair on hydronic heating system controls. Proper sealing at the low water cut off base is critical to safe boiler operation, as these controls protect against dry-fire conditions.

This gasket is specified for E-28 and 63 Series low water cut off assemblies, making it relevant to residential and light commercial hydronic boiler installations where McDonnell Miller-style controls are in service. It is also cataloged under model number CO-11. Technicians replacing a worn or damaged sylphon base gasket during a low water cut off rebuild or inspection will find this part a direct fit for the applicable series.

Key Features

• OEM-style replacement gasket for the sylphon base mounting interface
• Compatible with E-28 and 63 Series low water cut off controls
• Maintains pressure seal integrity at the sylphon assembly base
• Supports safe boiler operation by preventing leaks at the control mounting point
• Cataloged as model CO-11 for cross-reference and service identification

Compatibility

Designed for use with E-28 and 63 Series low water cut off controls (model number CO-11).

Installation Notes

Installation should be performed by a qualified HVAC technician or boiler mechanic. Shut down and depressurize the boiler system completely before removing any low water cut off components. Inspect the mating surfaces for corrosion or damage before seating the new gasket, and do not overtighten fasteners, as this can distort the sealing surface. All work on boiler controls should conform to applicable local codes and manufacturer service documentation.

Technical Specifications

• Application: Sylphon Base Gasket for Low Water Cut Off
• Compatible Series: E-28 and 63 Series
• Model Reference: CO-11

Standard Information

• Brand: XYLEM
• Manufacturer Part Number: 302500