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  1. 03-08-2006, 08:20 PM #1
    hvac wiz 79's Avatar
    hvac wiz 79
    hvac wiz 79 is offline Professional Member*
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    Today had a call for a goodman furnace. I wanted to check gas pressure during heat demand but did not see any tap for doing so. I did see 2 tiny itty bitty allen screws before & after valve but wasnt sure if this was anything. Is this where i would get a reading ? why so small if so &anyone know the thread size so i can buy proper fitting to check
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  2. 03-09-2006, 10:58 PM #2
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    sadlier
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    It must have been with the Gemini valve. If so then there are nipples with what look like set screws in them. To check the gas pressure you loosen the screw about 2 turns and then push the manometer tube over the nipple. Using 1/4" surgical tubing works ok.
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  3. 03-10-2006, 07:23 PM #3
    hvac wiz 79's Avatar
    hvac wiz 79
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    thank u .. i will see if it is the same as u refer to
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