D D DIYnotBot 20 Aug 2014 This image is referenced in the forum thread 'Am I heating our water right (inc. solar)?'
D D DIYnotBot 23 Sep 2014 This image is referenced in the forum thread 'Replacing central heating controls...'
D D DIYnotBot 10 Jan 2015 This image is referenced in the forum thread 'Safety Thermostat on Cylinder - only for Solar?'