OK, a shot in the dark here... Sounds like there is air in the system. Let the hot run for awhile to see if the "squeal" stops.
Or maybe you have a trapped critter in there that is complaining when you turn on the hot water? <LOL> Not serious!
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Skip & Susan Orrell
Hurst, Texas
2013 34 RLSA w/ most of the options
2013 Chevy 3500HD, D/A, DRW, 4X4
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