... tools and connections available in the van. All materials and equipment was ordered and delivered before we commenced any work. 7) I install the system to industry standards; I replace the gate valve on the cold feed because it wasn't holding up. 8) I installed the 450mm diameter by 900mm indirect pre-lagged cylinder, (which conforms to part L of the building regulations). I also installed an immersion heater as a back-up with the main heat source being primary circulation from the boiler. 9) I also replaced the drain-off washer to avoid any future problems. 10) I installed the bath and basin in the extension, I used tap connecters with fibre washers to make the seal between the appliance and pipe work. 11) I used Ballaflex valves before the outlets on all applicable appliances which were shut-off to stop unauthorised persons using the appliance. Also stickers stating 'Do Not Use' were place on appliances. 12) I took ...

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