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Installing a low fuel level sensor

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hdoud(at)satx.rr.com
Guest

Posted: Tue Sep 19, 2006 10:33 am Post subject: Installing a low fuel level sensor

Hi Listers..

  

 I have a Kitfox model, with a poly header  tank.   I want to put a low level float valve in the top of the  tank.   Aircraft Spruce # 6905-400.  I have an aluminum threaded  collar, that the small float valve will screw into.  

  

 Before drilling a hole in the tank, I want to make  certain that I can glue the aluminum collar onto the poly tank.   It  was suggested, by a lister, to use a 2 part polysulfide adhesive.    I'm aware that hardly anything will stick to polypropylene, and have been  thinking about ....Hysol?.....Epoxy?......Polyurethane glue?....Hot glue  gun sticks?.......Whatever the adhesive, it would have to stick to poly and  be gasoline safe..... Is there anyone out there who has had and solved my  problem?

  

 Appreciate any feed-back available.

  

 Herb

  

  

  

   [quote][b]

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Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Tue Sep 19, 2006 11:01 am Post subject: Installing a low fuel level sensor

At 11:33 AM 9/19/2006, you wrote:

 	  Quote: 	
		  Is there anyone out there who has had and solved my problem?


	


I can only say that my 2-part polysulfide installation was successful. No 

leaks! YEA! Unfortunately, the polysulfide doesn't cure hard, like epoxy, 

so if you use it you will have to be careful to restrain the aluminum 

collar when you install the sensor. (I think this will be the case for any 

installation into polyethylene.)

Guy Buchanan

K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.

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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too.

FLIER(at)sbcglobal.net
Guest

Posted: Tue Sep 19, 2006 11:12 am Post subject: Installing a low fuel level sensor

You'll likely never get it to seal Herb.  



Virtually nothing will stick to those tanks.  Your 

best bet would be to bite the bullet and go with an 

aluminum tank.



Regards,



Ted



--- Original Message ---

From: "HMDOUD" <hdoud(at)satx.rr.com>

To: <kitfox-list(at)matronics.com>

Subject: Installing a low fuel level 

sensor



 	  Quote: 	
		  Hi Listers..



I have a Kitfox model, with a poly header tank.   I 

want to put a low =
	


 	  Quote: 	
		  level float valve in the top of the tank.   Aircraft 

Spruce # 6905-400.  =
	


 	  Quote: 	
		  I have an aluminum threaded collar, that the small 

float valve will =
	


 	  Quote: 	
		  screw into.  



Before drilling a hole in the tank, I want to make 

certain that I can =
	


 	  Quote: 	
		  glue the aluminum collar onto the poly tank.   It 

was suggested, by a =
	


 	  Quote: 	
		  lister, to use a 2 part polysulfide adhesive.   I'm 

aware that hardly =
	


 	  Quote: 	
		  anything will stick to polypropylene, and have been 

thinking about =
	


 	  Quote: 	
		  ....Hysol?.....Epoxy?......Polyurethane glue?....Hot 

glue gun =
	


 	  Quote: 	
		  sticks?.......Whatever the adhesive, it would have 

to stick to poly and =
	


 	  Quote: 	
		  be gasoline safe..... Is there anyone out there who 

has had and solved =
	


 	  Quote: 	
		  my problem?



Appreciate any feed-back available.



Herb

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john(at)leptron.com
Guest

Posted: Tue Sep 19, 2006 11:47 am Post subject: Installing a low fuel level sensor

Do like the factory did and drill and tap, install using sealers/



John Oakley



--

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Lynn Matteson

Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

Posted: Tue Sep 19, 2006 1:27 pm Post subject: Installing a low fuel level sensor

I used Permatex Aviation Form-A-Gasket Sealant Liquid 3H for all my 

header tank sealing. Wipe on both areas, let set for awhile, and 

assemble. So far, so good.



Lynn

On Tuesday, September 19, 2006, at 02:33  PM, HMDOUD wrote:



 	  Quote: 	
		   Hi Listers..

  

 I have a Kitfox model, with a poly header tank.   I want to put a low 

 level float valve in the top of the tank.   Aircraft Spruce # 

 6905-400.  I have an aluminum threaded collar, that the small float 

 valve will screw into. 

  

 Before drilling a hole in the tank, I want to make certain that I can 

 glue the aluminum collar onto the poly tank.   It was suggested, by a 

 lister, to use a 2 part polysulfide adhesive.   I'm aware that hardly 

 anything will stick to polypropylene, and have been thinking 

 about ....Hysol?.....Epoxy?......Polyurethane glue?....Hot glue gun 

 sticks?.......Whatever the adhesive, it would have to stick to poly 

 and be gasoline safe..... Is there anyone out there who has had and 

 solved my problem?

  

 Appreciate any feed-back available.

  

 Herb

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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM

msm_9949(at)yahoo.com
Guest

Posted: Tue Sep 19, 2006 1:32 pm Post subject: Installing a low fuel level sensor

Yep, that's what I did: drilled the poly tank and carefully screwed a brass fitting into the hole. It self-tapped. I used a fuel proof thread sealer and, contrary to Ted's experience (knock wood), eventually it quit leaking. I did have to tighten the fitting a few times, as much as I dared while trying not to strip the "threads". Also, I drain my tanks after each flight, which may be contributing to my good fortune so far. 

   

  Good luck Herb. Sometimes it seems like there's as much art to this as science.

   

  



John Oakley <john(at)leptron.com> wrote:

  [quote]--> Kitfox-List message posted by: "John Oakley" 



Do like the factory did and drill and tap, install using sealers/



John Oakley



--

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vcmi(at)lewiston.com
Guest

Posted: Tue Sep 19, 2006 5:06 pm Post subject: Installing a low fuel level sensor

Being in construction, I have discovered that many  plastics can be glued successfully with ABS pipe cement or PVC pipe cement that  is used in the plumbing industry.  It is not sold in the glue aisle of the  hardware store along with all the epoxys that are supposed to work, I suspect  because it is used in applications not expected to be used by the ordinary  homeowner.  Try a spot first and see if it cuts into the plastic, then you  will know if it will work.  Jerry

 [quote]   ---

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shilocom(at)mcmsys.com
Guest

Posted: Wed Sep 20, 2006 2:50 am Post subject: Installing a low fuel level sensor

I would make a mechanical connection with  blind rivets first, using the clue as a sealant, NOT for bonding.  Bob U.  

 [quote]   ---

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