ShapeShifter
Buffalo, NY
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Bumpyroad wrote:have a faucet or two open when you crank it on.
I've seen this comment many times on the forum, but my owner manual does not say it. Why is this an issue? What's the difference between 40 PSI of air pressure building up for a short time, and 40 or more PSI of water pressure that's pretty much there 24/7? Are some people not using a regulator on the air line?
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Bumpyroad
Virginia
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ShapeShifter wrote:Bumpyroad wrote:have a faucet or two open when you crank it on.
I've seen this comment many times on the forum, but my owner manual does not say it. Why is this an issue? What's the difference between 40 PSI of air pressure building up for a short time, and 40 or more PSI of water pressure that's pretty much there 24/7? Are some people not using a regulator on the air line?
I would "guess" that the main reason is just in case the pressure on the air compressor is misadjusted and jumps way up really fast. other than that, i can't see why myself. on mine you don't really know how high it will run until it starts to rise and you can tweak it around.
but I don't see how it would hurt to start out that way, then close as you see fit.
bumpy
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427435
Rochester, Mn
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Keep in mind that the 40-45 psi that the manual says the lines are good for is static pressure. If you hook up an air compressor at 45 psi and don't have a faucet open, you'll have 45 psi in the water line. However, as soon as you open a faucet and air starts flowing, the pressure in the line will be a lot less.
The first time I blew out my lines, I set the air compressor regulator at 45 psi and got quite a bit of water out. I got to thinking about the pressure drops and the relatively weak air flow out of the faucets (once opened) and reset the regulator to 100 psi. Before I hooked the 100 psi up to the system, however, I MADE SURE ONE FAUCET WAS OPEN. A whole bunch more water came out and I had a much better air flow. The water that came out would have been more than enough to break something come a Minnesota January!!!
Anyway, that's the pressure I've been using since, but I make very sure a second faucet is opened before closing the first faucet.
Works for me anyway.
Mark
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Two Jayhawks
lenexa ks
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ShapeShifter wrote:Bumpyroad wrote:have a faucet or two open when you crank it on.
I've seen this comment many times on the forum, but my owner manual does not say it. Why is this an issue? What's the difference between 40 PSI of air pressure building up for a short time, and 40 or more PSI of water pressure that's pretty much there 24/7? Are some people not using a regulator on the air line?
Only regulator I utilize is the one built in to my 10 gal Craftsman compressor and I suppose I trust it. That said I wouldn't choose to have a situation with all faucets closed while hooked to compressor.
If I need to let the compressor catch up I will disconnect air line rather than close all faucets.
* This post was
edited 11/03/09 09:17am by Two Jayhawks *
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PapPappy
Wilmington, NC
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As mentioned....if the valves are open, it's not really all that critical....but if you forget to open a valve, you are at least safe with 40 psi.
You will do better with more volume than pressure.....so if you have an air tank, it will help...
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RJL
Manahawkin, New Jersey
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Hmmm, has me thinking now. I started mine last weekend at 25 psi and didnt have much flow. Bumped up to 40 psi and and quite a bit more water came out. Maybe when I get another free weekend I'll bump up to 70 or so, of course with an outlet open and see if there's anymore water in the lines. After reading this I bet there is. Interesting.
Thanks again
Bob
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Deen
Vancouver, WA
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There's an article in the latest MH magazine, it says that "blowing" the lines out with compressed air is NOT a recommended practice as it can leave enough water in the lines to freeze and burst them.
Deen - Vancouver, WA
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Deen
Vancouver, WA
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RJL wrote: After reading this I bet there is. Interesting.
Thanks again
Bob And then you've got to wonder how much more is left even at 70 psi!
Due to the number of postings here every spring by owners that blew out the lines and now have broken pipes I'll stick with antifreeze!
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Daveinet
il
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I use around 40 PSI. One thing I have found is that you need to open and close the system several times to let the water puddle in the low spots. Only water that puddles will really get blown out. Start with the highest point first and work your way down to your low point valve.
BTW: I hate antifreeze. It seems to take several tanks of water to ever get rid of it.
Dave
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Sully2
Cincinnati
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Deen wrote:There's an article in the latest MH magazine, it says that "blowing" the lines out with compressed air is NOT a recommended practice as it can leave enough water in the lines to freeze and burst them.
Now THERE'S some real expert advice!! I, myself have caught them in so many mistakes I dont even read the tech column anymore
2000 Country Coach Allure; Cummins ISC 330 HP; 71/2 - 8 MPG regardless
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