Diesel pipe

I have used that branch too, on a few occasions, one time they really got me out of the merd when I needed some extra length hydraulic pipes with swaged fittings for an autopilot job in the Haven. Really helpful and knowledgeable people.
 
Eaton Aeroquip FC234 or Parker's 221FR hose is my preference.... its metal sheathed with a coating to prevent chafing,( oil and fuel resistant on the outside), works with both oil and fuel lines... you can get various fittings attached with different thread sizes as well. As an example...
http://www.hoses.co.uk/images/2013catalogue/p199.pdf
http://ph.parker.com/us/en/fire-resistant-marine-fuel-hose-221fr

Don't just use any rubber hose, some of it is just not up to the job.

Agree
 
I hope so, as my boat does. I also have a rubber priming bulb in the fuel line as fitted on some diesel cars. Makes bleeding and filter changes much easier.

If you have any kind of leak in the return line, then you may have a serious problem. Without a shut off valve in both feed and return lines a tank could empty to the bilges with no means of stopping it. I fitted a low pressure non-return valve in the return line as a precaution after a pinhole appeared in a copper pipe. That section was cut out and replaced by fuel grade hose. I might replace the lot with cunifer in future, but that's a pretty big job. Provided you use fuel grade hose and are careful to route it clear of any sharp edges or restrictions, I see no major problem.
 
If you have any kind of leak in the return line, then you may have a serious problem.
Why? The return line is normally (in my limited experience) fed into the top of the tank and without a dip tube, so it cannot siphon back. Obviously if the engine is running and there is a leak, then you could fill the bilge with diesel, but that can be stopped by turning off the engine.
 
Why? The return line is normally (in my limited experience) fed into the top of the tank and without a dip tube, so it cannot siphon back. Obviously if the engine is running and there is a leak, then you could fill the bilge with diesel, but that can be stopped by turning off the engine.

On our boat both the return and suction lines enter the tank at the same (low) level...hence the problem arose. There wasn't a lot in the tank, but the clean up was not pleasant at all!
 
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