Description
This O’ring for 2.5″ heads is primarily used as the base seal between the control head and the FRP Vessel. This critical component ensures a leak-proof connection, preventing water bypass during service and regeneration cycles.
Maintain the integrity of your water treatment system with this premium replacement base O-ring. Specifically engineered for 2.5-inch control heads, this seal provides the essential hermetic interface between the valve head and the fiberglass-reinforced plastic (FRP) vessel. It is a direct replacement part designed to stop leaks at the tank’s neck and ensure peak efficiency during backwash, brine draw, and fast rinse cycles.
Features:
- Perfect Compatibility: Precision-molded for the 2.5″-8NPSM base connections found on popular Runxin models.
- Industrial-Grade Material: Manufactured from high-density Nitrile Rubber (NBR), offering superior resistance to water, pressure, and common water treatment chemicals.
- Leak-Proof Performance: Creates a robust, airtight seal that handles working pressures from 0.15 to 0.6 MPa.
- Durable & Resilient: Designed to withstand temperature ranges of 5°C to 50°C and resist compression set for long-lasting service life.
- Easy Installation: Flexible design allows for quick retro-fitting during routine maintenance or new system setups.
Specifications:
- Application: Base seal for 2.5-inch water softener and filter control heads.
- Material: Black Nitrile Rubber (NBR).
- Compatible Brands: Compatible with many standard 2.5″ threaded tank heads.
- Operating Temperature: 5°C – 50°C (41°F – 122°F).
Applications:
- Water softeners.
- Multimedia filtration systems.
- Activated carbon filters.
- Iron and manganese removal systems.
- FRP pressure vessels.
- Commercial and industrial water treatment equipment.
Installation:
Remove the old O-ring and thoroughly clean the sealing surfaces. Apply a thin layer of food-grade silicone lubricant to the new O-ring before installation. Position the O-ring evenly in the groove, ensuring it is not twisted or pinched, then securely tighten the control head onto the FRP vessel. Inspect for leaks after installation.
Why Choose the O-Ring for 2.5″ Control Heads?
- Ensures a dependable, leak-free seal.
- Manufactured from durable, chemical-resistant NBR rubber.
- Extends the life and efficiency of your water treatment system.
- Quick and easy to replace during routine maintenance.
- Compatible with most standard 2.5″ FRP tank control heads.
- Cost-effective solution for preventing leaks and maintaining system performance.









