tank sump o-ring

[drmax]

Hey ya fellas, a couple questions. I got a weeper on my right tank sump drain. I know the part num. is CAV-110. Can anyone give me the part number of just the o-ring or orings? It's leaking internal, and not from the threads. Also, what size of bolt threads into the tank, while I clean the old part, to plug the tank?

Is it worth to replace the entire assy, or just the o-ring? I'm creating an order from Spruce and want to get in on the way. Thx folks, DM

[Sam Buchanan]

Originally Posted by drmax

Hey ya fellas, a couple questions. I got a weeper on my right tank sump drain. I know the part num. is CAV-110. Can anyone give me the part number of just the o-ring or orings? It's leaking internal, and not from the threads. Also, what size of bolt threads into the tank, while I clean the old part, to plug the tank?

Is it worth to replace the entire assy, or just the o-ring? I'm creating an order from Spruce and want to get in on the way. Thx folks, DM

You need a 1/8" NPT pipe plug (these are not bolt threads) and the plug is part of my flight kit in case an o-ring starts leaking while on a trip (it will happen). CAV-110 is the o-ring part #, $0.35 each from Vans or exchange a soft drink for an o-ring from a local A&P.

[pazmanyflyer]

Originally Posted by drmax

I know the part num. is CAV-110. Can anyone give me the part number of just the o-ring or orings? Thx folks, DM

Order MS29513-006 from Spruce or others. Looks like ACS has a new web format so click accessories tab to get to o-rings.
http://www.aircraftspruce.com/catalo...ges/safair.php

SAF-AIR product info found here
http://www.mcfarlane-aviation.com/pd...%20Catalog.pdf

[bkilby]

Fuel Tank Quick Drain o-rings: MS29513-006.... This part I have saved from another post on VAF: (Viton o-rings from McMaster-Carr P/N 9464K11, size 008)

[Walt]

Unless it's really old it probably just has some debris in it which causes them to leak.

[Mike S]

Get another drain, and a few spare O rings.

Carry them with you in the plane.

When you have a leaker, just switch out the drain complete with a new O ring in it.

Leave the fuel filler cap on, and there will be a minimum of mess with fuel leakage as you switch units.

Dont forget a bit of Gas Tite/Fuel Lube on the threads.

[erich weaver]

Originally Posted by Walt

Unless it's really old it probably just has some debris in it which causes them to leak.

Concurr! My slow drip disappeared once I flushed it a couple times by collecting a couple nice healthy fuel samples. Keep a couple o-rings handy in your x-cntry tool kit though.

erich

[GeneL]

FYI Saf-Air fuel drain valves are also available in STAINLESS STEEL, and eliminate the rust on the outside and on the inside (which will cause leaks). Just ask for CAV-110SS. Gene

[drmax]

Originally Posted by Sam Buchanan

You need a 1/8" NPT pipe plug (these are not bolt threads) and the plug is part of my flight kit in case an o-ring starts leaking while on a trip (it will happen). CAV-110 is the o-ring part #, $0.35 each from Vans or exchange a soft drink for an o-ring from a local A&P.

I'm lost....if it isn't a threaded plug, how does it stay in the tank?

CAV-110 is the part number for the assembly, not the oring. I'm looking for the oring part number and I'm thinking it is this...
MS29513-006. I'll grab some of these rings with a new drain, and some lube. Thx

[drmax]

Originally Posted by Mike S

Get another drain, and a few spare O rings.

Carry them with you in the plane.

When you have a leaker, just switch out the drain complete with a new O ring in it.

Leave the fuel filler cap on, and there will be a minimum of mess with fuel leakage as you switch units.

Dont forget a bit of Gas Tite/Fuel Lube on the threads.

Ok, this is what I'll do. Where do you buy the GasTite product? A quick google search revealed notta. Thx Mike