Customer is having a pressure fluctuation issue. At the moment when I was here the pressure 70 psi. The expansion tank is full of water with no where the the expansion air created by the water heater to go it is just dispersed through the system. Water heater pan is also full of water but the temp and pressure valve was bone dry. Left estimates to replace either the pressure tank or the entire heater. The flue pipe for the water heater isn’t graded well at the moment and has caused some melting over time on the top of the water heater.