Simple shower and basin pump - overpresure question

[EdRedBird]

So we had our first large trip Bfast -Stranrear-Newcastle- Netherlands Belgium France Back through the UK via Ireland and the one thing we missed was... a shower

I am using bottled water for drinking and cooking and any waste goes either via the portapotty

I am not looking to put in a complicated dring and gray water system, but a tap for sink and shower would be handy
I am not looking at solarshower or foldable bags either . I have my heater fuel in an over wheel tamk and doing the same at the other end for water.

The way I am thinking is
12v pump ...to 2 way valve to shower or sink tap

I am not planning to have the 12v pump on all the time only when needed but there will be a delay in switching on the pump and making it to the shower , opening any valve.....

IS there a solution i can put before the valve , prefereably in the tank itself, that will open if i do not have tap or shower open , but closes if I do.

It would also enable me to heat the tank temperature to comforatble by adding a kettle or 2 boiling water and "mix"

Next trip will be a swedish nudist camp and I do want to make an impression so cold showers...not an option

 

[GeoffnDee]

Have a look on e-bay at a Caravan/Motorhome Whale PS7207 Water Pressure Sensing Switch which should do what you want.

 

[EdRedBird]

Have a look on e-bay at a Caravan/Motorhome Whale PS7207 Water Pressure Sensing Switch which should do what you want.

Thanks that is very helpful
BUT...
Without diagram..
powerswitch to pump - If switched on pump is running
The Pump goes to a split exit ...
1 inside the tank to circulate/mix water
2 Outlet to shower/tap

If 2 is opened 1 closes automatically to make sure there is no pressure loss
If 2 is closed 1 opens due to pressure as not to burn our pump until i power off

 

[nabsim]

Don’t know about all pumps but my Surefow has built in pressure switch, when turned on mine pressurises the system then turn off until it senses pressure drop. In what you have described it would come on briefly to pressurise to taps then turn off until you open a tap

 

[mitzimad]

Use a drop in pump put a switch to isolate it close to the shower or use a shower mixer with a micro switch same as most caravans

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[EdRedBird]

Use a drop in pump put a switch to isolate it close to the shower or use a shower mixer with a micro switch same as most caravans

The droppbox is empty but love the crockery solution in the first link .
Going to 0rder 2 wheelarch tanks

Wheel Arch Tanks - Online Tank Store - Camper Van and Motorhome

Wheel Arch Tanks UK Manufactured. Utilise Space Over The Wheel Arch For Water Storage. 24, 57 & 100 Litres Available. Universal Kit To Fit Many Vans.

www.onlinetankstore.co.uk

As I will be loosing some space i might regain some by replacing my heater fuel tank/