Just installed a Redwater device - it diverts the cold water in your hot water pipes till the hot water gets to the device then fully opens the valve to deliver the hot water to your tap or shower - it depends where you locate the device in the plumbing! It is expensive, but saves you having to collect the cold water in the shower etc when free camping! I plumbed it close to the T for the wash basin and shower, and to return the water back to the tank so none is wasted. I am not associated with the Redwater business, but just think it is a great idea for us to reduce our water consumption while free camping.
http://www.redwater.net.au/index.php/distributors.html
http://www.redwater.net.au/index.php/distributors.html
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