hi thanks for the quick reply,45 years
might need to get the full valve,then. i cant decide wether i can get away with just the divertor valve or if ineed the dhw flow valve also.
http://www.akgas.co.uk/Alpha-Diverter-Valve.html?gclid=CJrZr4eTrqcCFcod4Qod5Ey5CA