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Fill-Trol and Watts B911S-M3 Hot Water Boiler Fill on same system. Is that normal?

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loborr
loborr Member Posts: 2
in THE MAIN WALL
My gas hydronic boiler has a pressure reducing boiler fill valve and it also has an Amtrol Fill-Troll (combination expansion tank and automatic, pressure-reducing fill valve). Is this necessary or can I eliminate the fill-troll valve since I have a Watts boiler fill valve/pressure reducer? (of course I would keep the expansion tank)

The reason I am asking is that it appears that the actual valve for the fill-troll is either sticking shut or broken and it is not allowing water into the system. I would just replace the amtrol-fill troll valve but I can't find one because the one on my boiler is oriented to allow the amtrol fill-troll expansion tank to install horizontally. The only ones I have seen on the internet are for a vertical installation and that would not work with my current system due to piping and space. Thanks to anyone that can help with this question.

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  • Paul S_3
    Paul S_3 Member Posts: 1,261
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    Remove the whole fill trol assembly. ....install new expansion tank, you must check the new expansion tank with a tire pressure gauge it should be at 12 psi....if your system fill pressure requires more pressure you must pump it up with a bicycle pump..
    .
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
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  • loborr
    loborr Member Posts: 2
    edited March 2016
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    Thanks for the response Paul. Is there a reason I can't use the existing expansion tank without the fill troll valve?

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