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Automatic Bypass Valve for Laars Mini therm

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HJ_306
HJ_306 Member Posts: 1
Hi all, I have a very old Laars mini-therm JVS-125 powering the baseboard heating in my home. Recently the bypass valve has been leaking. I couldn't find the part number, wondering if someone can help me identify it, and what are the compatible parts to replace it. Thanks!

The backside

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  • hot_rod
    hot_rod Member Posts: 22,256
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    A low mass boiler and low mass distribution? What is the purpose of the valve?  Those systems should rev up quickly
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream