Solar shower limiter

vic008

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18 Aug 2007
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CHCH. NZ
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Has anybody worked out how to limit your shower to say 5lt, and more importantly, have a warning that you only have .5 liter to go.?
 
We have a dedicated tank/container in the shower for shower water. The water is heated to ideal temperature and then is pumped to a normal shower rose. The system works great. The main advantage of the above system is the water can be heated in a multitude of ways. The temperature of the hot water is not critical, as it mixed in the tank/container until the water is the perfect shower temperature. We prefer 44°C (110 °F) in winter and 41°C (106°F ) in summer.

To heat the water in summer we generally use an electric kettle as there is plenty of excess solar electricity. In winter we tend to use the diesel Reflex heater. Other options are a kettle on the propane stove or direct solar heating via a dark container left on deck.

The system also functions to restrict shower water if you wish (although we tend to take long showers). If you add 5L of warm water to the tank/container you can only can use 5L before gurgle, gurgle and it runs out. The water level in the tank/container can be seen so it obvious how much is left.
 
Has anybody worked out how to limit your shower to say 5lt, and more importantly, have a warning that you only have .5 liter to go.?
5 ltrs for a boat shower is a lot of fresh water, how big are your tanks, number of crew and time offshore?
 

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