First time I have winterized our trailer. I drained and isolated the water heater, opened low point drain, blew out the lines, and added antifreeze. I was surprised that it took almost two full gallons. Most folks say they use a gallon or less, did I do something wrong?
Nope, you're good.
I could probably do my little 165 Sport with 1 gal, but if you make sure you have a good pink color flowing everywhere it's easy to go 2 gallons. Fill the traps and pour any left over into the black tank.
You should be just fine. I did mine really quickly last night. I too blow out the water lines and then used one gallon. I had pink stuff coming out of each facet so I should be good. I could have done it with less, but I left the outside shower facet open (opps). I will probably grab another gallon just to run down the drains to ensure they are protected. I like to blow out the lines afterwards as it can get very cold (-30oF) where I store HTT, and I like to know I have no issues with potential expansion issues.
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