Choosing correct missing service valve caps


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Old 05-27-11, 03:04 PM
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Choosing correct missing service valve caps

The outdoor unit is approximately 2 years old part number FS4BD-018KA from Nordyne. Uses R410A. The two service valve caps for the unit are missing and I'm attempting to locate some replacements. I'm unable to contact the installer.

I measured the valve thread pitch which is 20 and the outside diameter of the threads is 7/16"

The caps I've seen listed for sale online are described as R22/R410 1/4" and R410 5/16" which are designated for a central air / mini split units, however, the 1/4" + 5/16" doesn't appear to align with the measurments I've provided above.

Any assistance with helping me unravel this puzzle would be greatly appreciated.

Don
 
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Old 05-27-11, 03:29 PM
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1/4" caps are the standard, 5/16" caps are mostly used on mini split systems.

Are you talking about the small caps that cover the schrader valves or the ones that actually cover the hex key valve.
 
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Old 05-27-11, 05:45 PM
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Much appreciate the response. Yes, shrader valves. Here's a picture of the missing caps. The shrader valve outside threads in the picture are 7/16" in diameter. Wondering if these aren't standard? Or perhaps the inside diameter of the shrader valve is 1/4" at that's the concept I'm missing here?

 

Last edited by DGNDGN; 05-27-11 at 06:35 PM.
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Old 05-28-11, 12:39 AM
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those are 1/4" ,,,, get the 1/4" caps
 
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Old 05-28-11, 01:00 PM
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Excellent. 1/4" caps it is. Very much appreciate the assistance.

Don
 
 

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