Jim Posted March 19, 2010 Share Posted March 19, 2010 Hi all, We have a difficult situation with our marine hot water system which I'd like to resolve, but, before ploughing ahead, I need to work out whether what I'm thinking of doing will work okay. To give a bit of background, our Falcon 22 has three water tanks in total, two cold and one hot (basic, very basic calorifier) The system is not pressurised and the taps operate an ITT pump using micro switches which pushes water out of the taps by pressurising the mid cold water tank. Our current setup is one cold water tank in the bow (the highest tank on the boat) which then feeds into the lower middle cold tank which is situated right next to our hot tank. To cut the story short, our current calorifier is worse than useless and has no immersion heater option either. We are also very limited on space if we want to fit a replacement unit in the same space and all "off the shelf" modern units are either way too big to fit or so small capacity, there simply wouldnt be sufficient hot water to merit doing it. Here's what I'm hoping will work..... There is sufficient room to fit a new calorifier in the engine bay but it would mean that the new unit would be higher than the middle cold tank and existing calorifier. Our ITT pump is however, very powerful and produces over 38PSI when operated. My question is this. Would the new tank fill with water okay and also would the heat exchange system with the engine be alright as it would be higher than the existing unit? I think it is possible to fit non return valves to the new tank but what worries me is operating an immersion heater when the tank isn't full Any advice, thoughts suggestions would be most welcome! We can't operate a pressurised system btw as we would need to start from scratch and it would cost a bomb. Quote Link to comment Share on other sites More sharing options...
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