[avandonk]

Managed to get the water pump and CPU water block and other bits. Below are the pictures of it set up to test it. When these pictures were taken the water in the esky was at 25.8C and the fridge was at -4.2C.
There is no vibration due to the pump.

Earlier I had put a bag of ice in the esky and the water temperature dropped to about 3C. The Peltier fridge managed to get to -14C without a load. I have tested 50% antifreeze down to -25C and it stays liquid.

The freezer I got second hand can get down to -25C when it's thermostat is set to max. So I should get -30C in the Peltier fridge with ease even on a hot night.

The tubing is Tygon and it stays flexible down to -40C. I will cover the tubing with neoprene foam insulation. The water block will be insulated with expanding foam.

Tomorrow I will drill some holes in the side of the freezer to test with anti freeze.

Bert