Truma Boiler Safety Drain Valve

The Truma Boiler Safety Drain Valve (Genuine part no. 70141‑02 / 70142‑05) is an essential safeguard for caravan and motorhome owners using the Truma Ultrastore or Combi water boiler systems. This combined safety and drain valve efficiently removes excess boiler pressure and allows full drainage to prevent freeze damage during winter storage.

Easy Push-Fit or John Guest Connection
Equipped with a 10 mm or 12 mm John Guest push-fit connection, the valve ensures a secure, watertight fit without the need for clamps or tools—just push in the semi-rigid hose until it locks

Pressure Relief & Drainage
It serves a dual purpose: automatically relieving pressure above ~2.8 bar, and enabling manual draining via a simple yellow ball lever. Pulling the lever drains water safely from the system, protecting the boiler and pipework during cold weather .

Durable Construction
Made from rugged, thermostable plastic with sturdy internal brass components, this valve resists heat, pressure, and vibrations. Built to OEM standards, it withstands temperature ranges from −30 °C to +80 °C and pressures up to 4.5 bar without issue .

Simple Installation & Versatility
Replacement is straightforward—turn off the system, depressurize, disconnect the hose, and swap in the new valve. It fits both Ultrastore and Combi boilers, and can be adapted for other flexible piping systems 

🔑 Final Thoughts

The Truma Boiler Safety Drain Valve is a critical safety and maintenance component for Truma boiler systems. Its ease of use, reliable safety function, and solid build quality make it a smart, cost-effective solution for preventing freeze damage and ensuring system longevity—perfect for any seasonal or permanent leisure vehicle setup.

Keywords: Truma safety drain valve, Ultrastore boiler valve, Combi boiler drain, caravan freeze protection valve, John Guest drain valve, Truma boiler maintenance.