Kinetico DO Cap Seal Part Number 8628

Kinetico DO Cap Seal – Part No. 8628

Maintain a Leak-Free, Efficient Kinetico System

The Kinetico DO Cap Seal (Part No. 8628) is a vital replacement O-ring designed to ensure a watertight seal beneath the Discharge Outlet (DO) cap on many Kinetico water softeners.
This precision-made seal prevents internal and external leaks, helping your softener maintain optimum performance and reliability.

Key Benefits

✅ Prevents Water Leaks – Seals the DO cap securely to stop drips or weeping from the control head.
✅ Maintains System Pressure – Ensures consistent flow during service and regeneration cycles.
✅ Improves Efficiency – Prevents air ingress and bypass, keeping your softener working as designed.
✅ Durable Construction – Manufactured from high-grade elastomer for long-term chlorine resistance.
✅ Simple Replacement – Easy to fit during regular servicing or rebuild of the valve head.

When to Replace

Replace the DO Cap Seal whenever:

• You notice water seeping from around the DO cap

• The softener fails to build pressure or leaks to drain

• You are servicing or rebuilding your Kinetico valve (recommended every 5–10 years)

Installation Advice

• Clean the DO cap and mating surface before fitting the new seal.

• Apply a thin layer of food-grade silicone grease (do not use petroleum jelly).

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

Compatible Kinetico Models

The Kinetico DO Cap Seal (8628) is used in a wide range of twin-tank systems fitted with the 2020C-series and Mach control valves, including:

• Kinetico 2020C / 2025C / 2030C

• Kinetico Mach 2020C / Mach 2020HE

• Kinetico 2060C / 2060s

• Kinetico 2175C / 2178C

• Kinetico Compact 2020 / 2020B

• Early Kinetico Plus softeners

💡 Not compatible with newer Kinetico Premier Compact, AquaBlu, K5, or K2 systems.