High pressure solar water heater: 1.Easy to install and operate; 2. No ... which can then be used to supplement hot water heating, space heating.Product Applications1) Domestic, industrial and commercial heating use ... 2) Suitable for open or closed Loop (glycol-water) 3) Space heating4) Caravan Parks, Hotels, Schools, Public Showers/Kitchens , ... red copper 22mm connector High pressure solar water heater