Installing pipe stat for pump

Hi Folks,

Have a few issues here an after the expensive plumber I had the other day I am not keen to get him or anyone else back for now as I cannot afford it.
All help much appreciated.

1 does the pipe thermostat go on the inflow to the stove boiler or the outflow. (top or bottom pipe)
The pump is already installed on the bottom pipe.
2 If it goes on the bottom pipe, does it need to be between the pump and stove or the other side of the pump.
3 What temperture should it be set between?

Does anyone know where I can buy a pipe stat in Galway an how much they cost?

Assuming the stove was installed correctly and is connected to the cylinder via gravity then the pipe stat should be strapped(provided)to the flow pipe(or outflow as you called it,top pipe).It should be set at 55 degrees. You can readily get one of these in any plumbing merchants and should cost you no more than €15.00