The existing cold water tank is a metal one sited in the airing cupboard directly above the HW cylinder - it's in a flat. The tank size is about 50 x 60 x 90 cm (wxdxh) - it's the ideal size for the airing cupboard.
I would like to replace it but it's quite difficult to find a new tank of dimensions that would fit in the space. The flat is all electric with no gas supply so hot water is heated by immersion heater. I have read in these forums instances where the thermostat on the immersion fails and the water in the cold tank gets very hot from water in the HW cylinder expanding into the cold tank. As the new tanks are plastic would they fail if something like that happens? Are there no safety cut offs in immersion heater thermostats?
If I could completely do away with the cold tank, that would be great but I'm not sure if that is possible without the option of using a gas combi boiler. The cold tank supplies the HW cylinder and the cold taps and WC cistern in the bathroom next door. There is also an electric shower installed which works great as it is.
I would like to replace it but it's quite difficult to find a new tank of dimensions that would fit in the space. The flat is all electric with no gas supply so hot water is heated by immersion heater. I have read in these forums instances where the thermostat on the immersion fails and the water in the cold tank gets very hot from water in the HW cylinder expanding into the cold tank. As the new tanks are plastic would they fail if something like that happens? Are there no safety cut offs in immersion heater thermostats?
If I could completely do away with the cold tank, that would be great but I'm not sure if that is possible without the option of using a gas combi boiler. The cold tank supplies the HW cylinder and the cold taps and WC cistern in the bathroom next door. There is also an electric shower installed which works great as it is.