It's for diverting solar heated water to the coil downstairs once I've filled my upstairs cylinder to 60 degrees.
(Even now my 20 tube panel is heating the incoming mains water from 8 C to 40C and by June we will be getting 2.5 times the solar radiation we are getting now, so I'm going to have spare heat and will use the main house cylinder as the dump)
Have found this but it's pricey: http://www.baytree.co.uk/products/20P_3way.html
(Even now my 20 tube panel is heating the incoming mains water from 8 C to 40C and by June we will be getting 2.5 times the solar radiation we are getting now, so I'm going to have spare heat and will use the main house cylinder as the dump)
Have found this but it's pricey: http://www.baytree.co.uk/products/20P_3way.html