Kinetico Main Base Seal - 2020C, Mini-KB, Aqua-Blu, BSS models + all commercial Part Number 8633

Kinetico Main Base Seal – 2020C

Ensure a Perfect Seal for Reliable Soft Water Performance

The Kinetico Main Base Seal – 2020C is an essential replacement O-ring that forms a watertight seal between the control valve head and the resin tank base on Kinetico twin-tank water softeners using the 2020C valve assembly.
This genuine-spec seal prevents internal leaks and ensures your Kinetico system continues to deliver perfectly softened water day after day.

Key Benefits

✅ Prevents Hard Water Bypass – Stops unsoftened water leaking into your softened supply.
✅ Eliminates Internal Leaks – Maintains correct separation between service and regeneration ports.
✅ Restores System Efficiency – Keeps your softener operating exactly as designed.
✅ Durable & Long-Lasting – Made from high-grade elastomer resistant to chlorine and wear.
✅ Simple Maintenance – A quick, cost-effective part to replace during a full service or rebuild.

When to Replace

Replace the base seal every 5–10 years or when you notice any of the following:

• Continuous water flow to drain

• Hard water at your taps

• Leaks between the valve head and tank

• Reduced system performance or regeneration failure

Installation Advice

• Lubricate the new seal with food-grade silicone grease before fitting (never petroleum jelly).

• Clean both sealing surfaces thoroughly before installation.

• Seat the O-ring evenly to avoid twisting or pinching.

Compatible Kinetico Models

This seal is suitable for Kinetico softeners fitted with the 2020C valve assembly, including:

• Kinetico 2020C (domestic twin tank)

• Kinetico 2025C

• Kinetico 2030C

• Kinetico Mach 2020C / Mach 2020HE

• Kinetico 2060C / 2060s

• Kinetico Compact 2020 / 2020B

• Kinetico 2175C / 2178C

• Kinetico Plus Softener (early models using 2020 valve)