Can be fitted vertically or horizontally. Accurate flow control. Thermostatic control to +/- 2 to 3 and deg even if the water pressure fluctuates. Full thermal protection to prevent scalding in the event of hot or cold water shut off.In the event of hot or cold water failure the valve will shut down as per the relevant standard. The patented cartridge is highly resistant to calcium build up - even in hard water areas. Ultra’s valves are suitable for use with all systems: gravity fed pumped unvented high pressure or fully modulated combi-boilers. Excellent flow rates - even at low pressure. The cartridge is fully reversible meaning if hot and cold supplies are the wrong way round it doesn’t need re-plumbing. Simply remove the cartridge turn 180 degrees and replace. Manufactured from solid brass. During installation extra care must be taken to avoid damaging the fittings.