Pot
Lee, can see how the tube was in the bottom part of the pot but what about the main part, was it completely filled or did you insert a liner inside the main pot as well?? enquiring minds need to know!!!
Also is there a ratio formula to the size of air space in the pot?? to the size of the bellows in the pressure switch, or put another way, if the pot size is reduced will you have enough play in the pressure stat??
Cheers, Mike