Description
2 Pack – 11183 O-Ring for Fleck, 10258 O-Ring for RainSoft / FDA EPDM Material
Quantity: 2 O-rings
Replacement O-ring Part Numbers:
- Part # 11183 for Fleck
- Part # 10258 for RainSoft
Key Features:
- FDA/NSF approved EPDM material O-rings meet food and drinking water contact standards
- Direct fit after-market replacement
- Made in the USA
User must install according to manufacturer specifications.
All parts are brand new and satisfaction is guaranteed.
System Use & Environment:
- Commonly positioned at valve body interfaces, bypass adaptors, and injector assemblies
- Ensures uniform sealing under fluctuating temperature and pressure conditions typical in residential softeners
- Designed for compatibility with potable water and chlorine-treated systems
Engineering Notes:
- EPDM compound exhibits superior resilience against heat-aging and chemical exposure
- Optimized durometer rating balances flexibility with mechanical stability for repeat service cycles
- Manufactured to precise dimensional tolerances that meet OEM-grade performance
Maintenance Guidance:
- Inspect O-ring grooves and mating surfaces for scale or corrosion before reassembly
- Replace during routine valve servicing to prevent minor leaks from escalating into system inefficiencies
- Store spare O-rings in a cool, dry environment to preserve elasticity over time
Each component is crafted in the USA using materials approved for contact with potable water, ensuring compliance with FDA and NSF standards. Intended for dependable performance in long-term Fleck and RainSoft system maintenance.





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