Fuel ine thread tape

rleslie · 13-09-2005, 09:32

I think I read somewhere that teflon tape should not be used on fuel fittings. Does anyone know what tape/sealant should be used?

Thanks
Roger

Dman · 13-09-2005, 09:48

NOTHING

Talbot · 13-09-2005, 11:02

should not need anything, however if really pushed, the locn'seal from loctite is a useful product.

Richhh · 13-09-2005, 11:20

NOTHING should be used on fuel line threads.

Most boat builders use cheapy 'compression' fittings that are quite inferior to a standard flared union. Normal vibrations, etc. on a boat will cause the compression nut/ferrule inside a compression fitting to compress and deform the soft copper tube ... hence the leak and no matter how tight you run up the threads. Actually such compression fittings are for ONE TIGHTENING ONLY and should be replaced every time you loosen a fitting - the tube should be cut and a new compression ferrule installed.

Flared fittings (double flared is preferred) using stainless steel tube is the SAFE way to make such a connection. Flare tools are cheap - just takes some 'expertise' to use one.

FYI - copper is INCOMPATIBLE with fuel oil - it accelerates the 'ageing' process of the oil.

hope this helps.

13-09-2005, 09:32	#1
rleslie Registered User Join Date: Apr 2003 Location: Winters - Out Cruising / Summers in the NC mountains Boat: Brewer 42 Posts: 290	Fuel ine thread tape I think I read somewhere that teflon tape should not be used on fuel fittings. Does anyone know what tape/sealant should be used? Thanks Roger

13-09-2005, 11:02	#3
Talbot Registered User Join Date: Jun 2004 Location: Stavanger, Norway Boat: Last boat was a Catalac 9m Hi-Jude Posts: 2,905	should not need anything, however if really pushed, the locn'seal from loctite is a useful product. __________________ "Be wary of strong drink. It can make you shoot at tax collectors - and miss." Robert A Heinlein

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13-09-2005, 09:48	#2
Dman Registered User Join Date: Aug 2005 Posts: 41	NOTHING

13-09-2005, 11:20	#4
Richhh Registered User Join Date: May 2005 Location: Pennsylvania Boat: Tayana 37, M-20/I-20 Scow Posts: 250	NOTHING should be used on fuel line threads. Most boat builders use cheapy 'compression' fittings that are quite inferior to a standard flared union. Normal vibrations, etc. on a boat will cause the compression nut/ferrule inside a compression fitting to compress and deform the soft copper tube ... hence the leak and no matter how tight you run up the threads. Actually such compression fittings are for ONE TIGHTENING ONLY and should be replaced every time you loosen a fitting - the tube should be cut and a new compression ferrule installed. Flared fittings (double flared is preferred) using stainless steel tube is the SAFE way to make such a connection. Flare tools are cheap - just takes some 'expertise' to use one. FYI - copper is INCOMPATIBLE with fuel oil - it accelerates the 'ageing' process of the oil. hope this helps.