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Old 10-19-2015, 10:58 AM   #1
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Blow-out Winterizing

For the first time, I'm going to try the blow-out method of winterizing this year. I bought a 3-gallon oilless compressor at Harbor Freight and a female input air adoptor that I'll use both on the water heater and city water inlet valves. (I do, still, have to pick up a ball tire inflator with a clip so it's not a 2-man job.)

This is the plan:

-Drain water heater, fresh water tank, and the two hot/cold drains. Reseal everything except water heater.
-Connect compressor (set to 40 PSI) to water heater drain and blow out outside shower, kitchen and bathroom faucets, inside shower, and toilet.
-Disconnect and seal water heater (turn valves so it's in bypass mode) and connect to fresh water input and blow out everything, again.
-Turn on water pump and run a faucet until it's dry.
-Redrain water heater, fresh water tank, and two low point drains.
-Pour pink antifreeze into all drains.
-After parking in the RV lot, redrain it all and pour a few inches of red stuff into the toilet. (I usually leave the drain inside the water heater but it's lose and I'll losen/tighten it when I visit in the winter to prevent rust taking over....I'll probably put in a new one in the spring as it's getting worn.)

Did I miss anything? (I also put covers on my tires and AC and have covers that go over my big awning and the slide out awning.)
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Old 10-19-2015, 11:13 AM   #2
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Dont Blow out your system thru the W/H drain port,you are going to move a LOT of Crud into the lines! Youroo!!
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Old 10-19-2015, 11:13 AM   #3
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A word of Caution....
Just be sure there is NO Pressure applied "before" you remove the Hot Water Tank Anode or drain plug. >it will shoot out-a-there like a rocket< if there is any pressure.
Relive any pressure by opening a hot water faucet valve first to be safe.


hope this helps
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Old 10-19-2015, 11:20 AM   #4
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Originally Posted by youroo View Post
Dont Blow out your system thru the W/H drain port,you are going to move a LOT of Crud into the lines! Youroo!!
Oh I didn't think of that....so just blowing via the fresh water input is sufficient?

I'm worried about water getting left in the water heater cutoff pipes so will open/close each one with the water heater drain open to ensure they are dry.
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Old 10-19-2015, 11:22 AM   #5
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Quote:
Originally Posted by Islander View Post
A word of Caution....
Just be sure there is NO Pressure applied "before" you remove the Hot Water Tank Anode or drain plug. >it will shoot out-a-there like a rocket< if there is any pressure.
Relive any pressure by opening a hot water faucet valve first to be safe.


hope this helps

Good point...I've drained the water heater while it was, still, pressurized and got baptized more than once!
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Old 10-19-2015, 11:31 AM   #6
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Quote:
Originally Posted by ColoradoRick View Post
Oh I didn't think of that....so just blowing via the fresh water input is sufficient?

I'm worried about water getting left in the water heater cutoff pipes so will open/close each one with the water heater drain open to ensure they are dry.
I didnt say that blowing thru the City water input was sufficient,I do know that going thru the proper procedure of draining THEN pumping RV Antifreeze in the system will protect a RV from freezing,I doubt that just blowing the system has a 100% Guarantee! Run a Search at the Top,days of reading! Youroo!!
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Old 10-19-2015, 01:57 PM   #7
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Yes, I will suck the red stuff in as the last step before heading out to park her. It got -20 below here last winter.
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Old 10-19-2015, 02:33 PM   #8
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Rick,

As youroo said, don't blow back through the water heater drain. That's asking for trouble. Connecting your air pressure to the city inlet is all you need.

As for your concern about the WH inlet/outlet lines... I always blow a small amount of air through the lines BEFORE I bypass (but after removing the tank drain) to take care of any small residual amount of water that could possibly be in the short lines to the tank. It's probably not likely much would be in there (and some plumbing configurations allow for gravity to empty them) but if it gives peace of mind, it really only takes a second of time before turning the bypass valves.
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Old 10-19-2015, 09:08 PM   #9
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Thanks, I got her done today as we have 30's at night rapidly approaching.

I did make a mod, though. Last year, the red stuff just wouldn't suck through the outlet on the trailer and it was doing it, again. So I got my pipe cutter and cut the hose near the water pump then attached about 2 feet of clear hose to that and it worked like a champ...used just less than 2 gallons.

When driving out of the RV lot, I noticed about half of them had their stabilizers down...do y'all put yours down and why? (One even had his x-chalks on it, strange)
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Old 10-19-2015, 10:54 PM   #10
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Quote:
Originally Posted by Islander View Post
A word of Caution....
Just be sure there is NO Pressure applied "before" you remove the Hot Water Tank Anode or drain plug. >it will shoot out-a-there like a rocket< if there is any pressure.
Relive any pressure by opening a hot water faucet valve first to be safe.


hope this helps

I made that mistake ONCE. Luckily no injuries but it left me soaking wet and covered in white crud.
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