I do both. Drain water heater, holding tanks, and open low point drains. Then cap the low point drains fire up the compressor and blow out the lines and then pump the pink stuff through the lines and add some to the drains. Don't forget to flush the toilet until it runs bright pink. Two gallons of the pink stuff is all that is needed.
I have needed repairs to my trailer twice. Once from a blow out and once due to driver (my) error. Both times I took the trailer in for an estimate and told the dealer (two different dealers) that they should order the parts and call me when all the parts are in and they have the time to install. In both instances the parts were installed in less than 24 hours and they both did a good job.
If you leave your unit with the dealer they have no reason to keep up a schedule on your repair. They will handle other customers who insist on a timely repair or install.
Short history: Hydroboost brake booster was leaking power steering fluid so I took the truck in to have the booster replaced. Now after the truck has been driven about five to six miles the brake pedal feels like it is catching when I first apply the brakes. I have to push harder and harder to get beyond the catch to apply the brakes and when the brakes start working they will shake the truck as the brakes are stopping the truck in an aggressive manner.
The shop has installed a second new booster and the truck is still having this problem.
Anyone have an opinion as to what is causing this problem?