The shower valves are thermostatic so the water stays a consistent temperature even if the water pressure fluctuates. Quality assured by a 10-year warranty. As with all thermostatic shower mixer taps, it is essential that the water is not left to freeze whilst inside the tap. Frozen water expands and can damage the pipework and/or the internal thermostatic valve. Because this thermostatic mixer tap is intended for use in holiday homes and caravans, it has been designed so that it can be easily disconnected. The shower mixer tap is supplied with full instructions on how to ensure it is drained down correctly during the winter period Nes Home Mini Vertical Thermostatic Shower Mixer Valve Suitable for Static Caravan in Metallic Silver