I would put 3 washers on the bottom of the pan for the fluid.
All parts bought were tested at 150 psi by the manufacturer. The hose is 200 psi tested. and I understand your concern as it was my concern also.
Check the bottom of the down tube?
I thought about that method, but due to the very close configuration of the compressor and the tank, It was impossible. Since Jan 1, 2017, and I have been really using the compressor, Filter 1 is about 1/2 way with pink crystals.It is working out GREAT!!!
The hose is 250psi tested. sorry