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Old 02-17-2014, 02:30 PM   #11
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Re: RV plumbing freeze test

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Originally Posted by roach711
Quote:
Originally Posted by ol trunt
Roach, from now on you will be known as "Dr. Science". Its good to see an analytical approach to our bus stuff. Don't leave the lab--keep up the good work! Jack
The scientific approach is fine - it answered the question at hand - but there's nothing like having long personal experience with the stuff. I remember long ago reading that from an engineering standpoint, a bumblebee shouldn't be able to fly. Fortunately, bumblebees don't care what engineers think.

On the other hand, I don't automatically assume someone who's "in the trenches" has it right either. Last year we had a boiler tech out to certify the safety controls on our hot water boilers and as I was standing there he turned the boiler high limit down from 230 degrees down to 210. When I asked him why he set it so low he said that water boils at 212 degrees and that boiling would damage the boiler. I had to explain to him the effect of pressure on the boiling point of water. Needless to say, when we did need repairs I called someone else.
HAHAHAHA!!!! That is awesome. I've personally heated water up to 260* in a pressurized, closed loop heating system. It was a little scary when a hose blew, though Especially when I was standing right there. In a t-shirt. -_-
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Old 02-22-2014, 02:19 AM   #12
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Re: RV plumbing freeze test

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Originally Posted by roach711
. . . I had to explain to him the effect of pressure on the boiling point of water. Needless to say, when we did need repairs I called someone else.
Would it blow his mind to learn that propane boils at roughly -44F (-42C), and pressure keeps it liquid on a hot summer day?
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Old 02-22-2014, 09:55 PM   #13
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Re: RV plumbing freeze test

Quote:
Originally Posted by Redbear
Quote:
Originally Posted by roach711
. . . I had to explain to him the effect of pressure on the boiling point of water. Needless to say, when we did need repairs I called someone else.
Would it blow his mind to learn that propane boils at roughly -44F (-42C), and pressure keeps it liquid on a hot summer day?
Never mind him, that blows MY mind.
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