Xylem-McDonnell & Miller 312200 Valve Bracket Gasket, 5-Pack (Model 21-27)

Description

The Xylem-McDonnell & Miller 312200 Valve Bracket Gasket is a genuine OEM replacement part designed to maintain a secure, leak-free seal between the valve bracket and the body of McDonnell & Miller 21, 25A, and 27 Series low-water cutoffs and pump controllers. Sold in a convenient package of five gaskets, this part is ideal for service technicians and contractors who perform routine maintenance or emergency repairs on hydronic boiler systems.

Key Features

• Genuine Xylem-McDonnell & Miller OEM replacement gasket
• Designed specifically for the 21, 25A, and 27 Series valve bracket assemblies (Model 21-27)
• Package of 5 gaskets — ideal for stocking service vehicles and parts rooms
• Ensures a proper, leak-free seal at the valve bracket connection
• Helps restore full system integrity and reliable low-water cutoff performance
• Easy drop-in replacement with no modifications required

Compatible Models

• McDonnell & Miller Series 21
• McDonnell & Miller Series 25A
• McDonnell & Miller Series 27

Application

This gasket is a critical maintenance component for steam and hot water boiler systems equipped with McDonnell & Miller float-type low-water cutoffs. Regular inspection and replacement of valve bracket gaskets helps prevent water leaks, ensures proper float operation, and extends the service life of the control assembly. Keeping a supply of these gaskets on hand minimizes downtime during scheduled maintenance or unexpected service calls.