Xylem-McDonnell & Miller 318826 Replacement O-Ring
Keep your McDonnell & Miller 69 Series low water cutoff operating at peak performance with the genuine Xylem-McDonnell & Miller 318826 Replacement O-Ring. Designed specifically for the Model 69-113, this OEM-quality sealing component ensures a proper, leak-free fit within the float chamber assembly — helping to maintain the integrity of your boiler’s low water protection system.
Product Overview
The McDonnell & Miller 69 Series is a trusted line of float-type low water cutoffs and pump controllers widely used in steam and hot water boiler systems. Over time, O-rings can wear, crack, or degrade due to heat cycling and water exposure. Replacing a worn O-ring with the correct factory-specified part is essential to prevent leaks, maintain proper float operation, and ensure continued safe boiler performance.
Key Features
- OEM replacement O-ring engineered specifically for the McDonnell & Miller 69 Series (Model 69-113)
- Provides a reliable, leak-free seal within the float chamber assembly
- Restores proper operation of the low water cutoff without full unit replacement
- Manufactured to Xylem-McDonnell & Miller quality standards
- Cost-effective maintenance solution for 69 Series low water cutoffs
- Easy to install as part of routine boiler maintenance or service
Compatibility
- Designed for use with: McDonnell & Miller 69 Series Low Water Cutoffs
- Compatible Model: 69-113
- Brand: Xylem-McDonnell & Miller
- Part Number: 318826
Application
Ideal for HVAC technicians and boiler service professionals performing preventive maintenance or repairs on steam and hot water boiler systems equipped with McDonnell & Miller 69 Series low water cutoffs. Always use the correct OEM-specified replacement parts to ensure safe and reliable boiler operation.








