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Old 10-27-2014, 04:33 PM   #11
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very simple plan. At the shop we blow, and antifreeze.
Use your existing water hose regulator, screw it in to the city water connection. Screw the blow out plug to the regulator. NOW- open every faucet, every low point drain, and leave the plug out of your water heater- (do NOT) bypass the water heater. Now have one person apply the air to the blow out plug, while some else goes inside and monitors the water from the faucets, and flushes the toilet.

Now you can remove air flow. Remove plug/regulator from city hookup. Leave faucets/water heater/low points open. You are good to go.
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Old 10-27-2014, 08:34 PM   #12
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The little 12 V compressors work just fine. You don't want much psi anyway. Just connect to the fresh water fill.
You need more volume than pressure and the little 12 volt ones are sadly lacking in volume capability but can develop some really high pressures if you leave the faucets shut too long.
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Old 10-28-2014, 09:49 AM   #13
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I followed the directions and everything turned out ok, Good thing because it is 32 degrees at this time. Dodged a bullet this time!
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Old 10-28-2014, 09:59 AM   #14
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I set my compressor regulator down to about 25-30psi, open all the taps in the TT and let it run air through the pipes for hours while I go do other things.
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Old 10-28-2014, 10:19 AM   #15
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I may have missed it in the replies..., but when using the air pressure method don't forget to "run the water pump dry", applying air pressure through the city water connection will not clear the water pump.

Bob
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Old 10-28-2014, 06:55 PM   #16
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I may have missed it in the replies..., but when using the air pressure method don't forget to "run the water pump dry", applying air pressure through the city water connection will not clear the water pump.

Bob
...and if you follow up with anti freeze, you'll have a nice bit of the pink stuff in your pump.
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Old 11-01-2014, 09:06 AM   #17
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Just did mine yesterday. Took longer to gravity drain than blow the lines down. Blowing them out took about 10 minutes to do every water outlet and hot water heater. I also blew out the hot water heater. I set the psi to 30#. Quite honestly I wasn't aware of this until I watched a youtube vid from camping world, but after cawling around under the sink and bed I saw just what is used for the water lines and too much is NOT a good thing on these lines. Then I just used the pump to suck in about a gallon of the pink stuff opening one water valve at a time until pink flowed out, Did not put it in the hot water heater. Pour a little bit into each P trap drain and into the toilet. I also put some into gray and black tank to mix with any residual water left to keep from freezing. All in all it took me about 30 minutes to do everything and that including making up the air fitting and exploring the plumbing to make sure I knew the exact layout.
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