When hot and cold lines cross... which one on top?

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Old 01-14-14, 06:41 PM
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When hot and cold lines cross... which one on top?

What to do when you have to costs a hot and cold line? Which one goes on top? Does it even matter? The pros do this so much, there must be some general rule of thumb. Or maybe superstition?
 
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Old 01-15-14, 06:31 AM
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There is no rule that I am aware of. Usually the routing of the lines will make one work better on top but when in doubt I put the hot line on top because heat rises. There's no real logic or much of a reason but it's my tie breaker for which goes on top.
 
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Old 01-15-14, 08:35 PM
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I would add that when two pipes cross make certain that they cannot rub on each other.
 
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