Glowworm & Saunier Duval & Protherm & Vaillant 3 Way Valve

Glow-worm, Saunier Duval, Protherm & Vaillant 3-Way Valve

The 3-Way Valve is a crucial component in Glow-worm, Saunier Duval, Protherm, and Vaillant boilers, responsible for diverting hot water between the central heating system and the domestic hot water supply. It ensures efficient heating control, allowing the system to switch between heating radiators and supplying hot water to taps and showers.

🔹 Key Features:

• Brand Compatibility: Suitable for Glow-worm, Saunier Duval, Protherm, and Vaillant boilers
• Function: Directs heated water either to radiators (central heating) or taps (hot water supply)
• Material: Durable brass or high-strength plastic construction for longevity
• Actuator Compatibility: Works with a motorized actuator to switch water direction automatically
• Application: Essential for combi and system boilers that require hot water flow control

🔹 Common Issues Indicating Replacement:

✔ No hot water or no central heating
✔ Lukewarm water from taps or inconsistent temperatures
✔ Boiler making clicking or buzzing sounds (faulty actuator motor)
✔ Radiators heating up when only hot water is needed
✔ Boiler error codes related to diverter valve failure

🔹 Installation Notes:

1. Turn off power and isolate the boiler before replacing the valve
2. Drain the heating system if necessary to prevent leaks
3. Remove the faulty 3-way valve and actuator (if applicable)
4. Install the new valve, ensuring all connections are secure
5. Refill the system, bleed radiators, and check for leaks
6. Test the boiler’s heating and hot water functions to ensure proper operation

⚠ Important: Installation should be performed by a Gas Safe registered engineer to ensure safety and compliance with regulations.

The Glow-worm, Saunier Duval, Protherm, and Vaillant 3-Way Valve is a critical component for maintaining efficient heating and hot water supply.