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ther,ostatic pipe union

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Timco
Timco Member Posts: 3,040
in THE MAIN WALL
Laars mod units use them. They have small holes for some flow, and open when the pri loop reaches the desired temp. Just a thermostat in them like a car would have. With it closed, it recirculates through a bypass...when open the pri loop gets the flow.

Tim
Just a guy running some pipes.

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  • Robert Martin
    Robert Martin Member Posts: 1
    thermostatic pipe union

    Work done on old cold conversion gravity to forced hot water found a 2" general thermostatic union on supply before flow checks. this is rated at 100 degrees F. Any information would be appreciated. My 1938 Audel's don't even show it.
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