Recent content by Naples34114

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    Pentair Mastertemp 400HD - Manifold Design & Operation

    UPDATE: After studying a couple video repairs for either the regulator or bypass it seems to be the following. Any confirmation or comments from others appreciated. As the COLD water from the pool return enters the chamber it flows directly to the top three of six heat exchanger tubes via a...
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    Pentair Mastertemp 400HD - Manifold Design & Operation

    Good Morning, I am interested in the water flow in the manifold. How does the water flow at startup (cool) to make its way into the heat exchanger and then as the initial water heats and pressure builds to 120 f the thermostat and bypass begin to operate in unison at steady state. It seems as...
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    Pentair Mastertemp 400HD - Manifold Design & Operation

    Hi Folks, As a new poster but a user for many years I enjoy the site and all the great info. Recently I had my Temperature Regulator fail in my relatively new Mastertemp 400HD due to bad water balance and resulting corrosion. For reference I had an HLS fault that started the process with the...