O&N bladder drain valve leaking

[tigers2007]

After perusing some threads here it’s my understanding that my bladder uses the F391-18 (1/8” NPT). Is it possible to replace the O-Ring in the valve itself? If so, what is the part number?

 

 

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[Marauder]

After perusing some threads here it’s my understanding that my bladder uses the F391-18 (1/8” NPT). Is it possible to replace the O-Ring in the valve itself? If so, what is the part number?
 
 
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I am not sure it is worth the trouble. I just replaced mine.



BTW - I don’t recall that part number.


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[tigers2007]

Looks like its a SAF-AIR SA18. McFarlane Aviation wants $23.93/ea and it appears they sell a "seal kit" (SA18K) for $2.90. This blows as I've been trying to fly my GD plane for the last couple weeks and today has been the only VFR day that it has been possible. When I was sampling the fuel the damn thing started pissing fuel like there was no drain. I played with it so it just slowly drops. I'm about to make the 30-min trek back to the hangar with three more 5-gallon jugs and I bought a brass 1/8 NPT plug too. Spruce has the parts but they want one arm and one leg for shipping.

Edit: I ended up just ordering everything from the Spruce as I needed a couple cases of oil and some ez fuel lube anyways...

[tigers2007]

Well it looks like these Saf-Air SA18’s are totally rebuildable.



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