Description
The 15mm x 1/2″ 4 Bar Unvented T & P Relief Valve is an essential safety component for unvented hot water systems, designed to prevent excessive pressure and temperature build-up.
Operating at 4 bar, this valve automatically releases excess pressure and heat, protecting your cylinder and connected components from damage. It helps maintain safe and efficient system performance in both domestic and commercial applications.
Built for durability and reliability, this valve is suitable as a direct replacement for a wide range of unvented cylinders, offering easy installation and long-term performance.
Why This Valve Matters
- Protects against dangerous pressure and temperature build-up
- Ensures safe operation of unvented cylinders
- Meets UK compliance standards (WRAS approved)
- Prevents costly damage and system failure
Frequently Asked Questions
1. What is the function of a T & P relief valve?
It releases excess pressure and temperature from your unvented hot water system to maintain safe operation and prevent damage.
2. What does 4 bar mean?
4 bar is the pressure level at which the valve activates to discharge excess pressure and protect the system.
3. Is this valve suitable for all unvented cylinders?
It fits many systems, including Megaflo, Kingspan, Joule, and Everflo, but always check your cylinder’s required pressure rating before purchase.
4. Can I use a 4 bar valve instead of a 6 or 7 bar valve?
No, you must use the correct pressure rating specified for your system to ensure safety and proper performance.
5. What are the signs of a faulty valve?
Common issues include continuous dripping, leaking, pressure discharge, or overheating in the system.
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