I am hoping Vic chimes in on my question but I'm sure others out there might also have my answer. To winterize my LectraSan, the manual says to pump it out. My unit is in a compartment with very little head room so getting something into the top of the unit to pump out is challenging. Could I just fill the unit with concentrated salt solution by flushing it through the toilet? I have a separate salt feed tank that does this every time you flush so why not dump the same solution in the toilet to winterize the unit. Is there any harm in leaving a concentrated salt solution in the LectraSan over the winter?