What other items are required for a diy solar heating system?
Pressure Relief Valve If the expansion vessel fails, this protects the system. If the system pressure reaches 3 bar, the valve will automatically vent excess pressure in the form of water/steam into the overflow pipe to the outside. The valve also has a manual operating knob – handy for flushing the system whilst commissioning. Filling Loop This fills the system with mains water. It consists of a mains water valve and double check valve connected via a length of flexible hose. To comply with Water Byelaws, the hose should be removed once the system is filled and vented. The check valve prevents contaminated water from the solar system re-entering the mains water supply. Pressure gauge This indicates the system pressure. The system should be filled until the gauge pressure matches that of the Expansion Vessel pre-charge pressure as stated on the vessel. All these are available in my diy solar heating kits here.
