Are two hose clips really needed on diesel fuel pipe?

[chuzzlewit]

The hose tail is barely long enough to support them. Has anyone ever had an adequately tightened hose clip loosen itself?

 

[macd]

I know of no requirement to double clip fuel hoses. It's generally only something that might sink the boat that's double clipped (or something else you really, really don't want to leak, like holding tank plumbing).
Incidentally, I prefer this type of clip to ordinary hose clips. They offer a more reliable seal:
http://www.google.co.uk/imgres?imgu...YVP6XBYWX7Aah_oGYCQ&tbm=isch&ved=0CCEQMygAMAA

 

[pvb]

Never had a problem with single clips on fuel hose. However, like macd, I don't like ordinary jubilee clips.

 

[jdc]

The BSS check list allows clips, and doesn't insist that they be doubled up. Indeed I've never heard of any usual practice of doubling up clips on fuel lines, and if there are any used on the engine itself they won't be doubled up. Note also that the function of clips is NOT to make a seal - that way lies frustration - but simply to retain the hose on the spigot. The BSS specifically requires that the clips, if used, not be too tight.

BUT, imho, clips, whether Jubilee or a superior type, are the fuel-line equivalent of choc-block for electrical connections: ie scream amateur and bodge. Given how many [diesel] engine problems are due to minute and hard-to-trace air leaks into the fuel system, it's worth the small extra trouble and expense of doing a proper job with swaged fuel pipe ends. Lots of suppliers will make them up for you, and if you only want a short length ASAP sell made up lengths complete with swages.

 

[prv]

BUT, imho, clips, whether Jubilee or a superior type, are the fuel-line equivalent of choc-block for electrical connections: ie scream amateur and bodge.

Best tell Volvo that then - several painted-over jubilee clips on my D1-30 . And really cheap flimsy ones too, in ordinary steel.

Where I've had cause to disturb them, I've replaced them with sturdier stainless clips.

Swaged hoses certainly look neater, but it would be a major additional hassle to have to get each individual length assembled off the boat (by a supplier who's always closed when I'm working on it). With plain hose and clips, I can work along a run securing the hose, then when I get to the end cut it off exactly to length in situ.

Pete

 

[jdc]

Best tell Volvo that then - several painted-over jubilee clips on my D1-30 . And really cheap flimsy ones too, in ordinary steel...

It's the same on my Kubota, although not actual Jubilee types but a peculiar type not designed to be re-usable and which looks rather better at achieving round compression.

But you must admit that problems caused by minute and difficult to trace air leaks do come up quite frequently on here, hence my quest to reduce the number of potential causes - of which badly-made hose terminations are likely to be a significant proportion.

 

[VicS]

For hose connections that do not have to be periodically undone/ refitted consider ear hose clips as an alternative to crimped or swaged end fittings.

Available with double ears, or single ears for confined spaces.

 

[Corribee Boy]

Do the Ear Clips need a specific type of tool to tighten them?

I've always thought that the good thing about the superior form of jubilee clip is you can remake them quickly and easily if need be, using a random length of spare pipe that you carry for just such an eventuality, whereas swaged would be a challenge in most circumstances.

 

[VicS]

Do the Ear Clips need a specific type of tool to tighten them?

They do, but carpenters' pincers will do it I think.

IIRC the special tool will also open them up for removal

But + 1 for the mini hose clips suggested by macd. Much better for small diameters than worm drive clips

 

[chuzzlewit]

Thanks or the replies: I've ordered 20 of macd's.

 

[KellysEye]

The only thing we had two hose clips on were the through hulls.