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The Norfolk Broads Forum / Broads Boat Owners Q & A / Diesel heaters
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Posted By Discussion Topic: Diesel heaters

Similar Threads That Might Help :
Diesel Heaters - But Which Type ????| Advice on fitting a diesel heater| Advice on fitting a diesel heater| Advice on fitting a diesel heater| Wanted - Webasto/Eberspacher diesel heater|

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Pulse
Dec-10-2020 @ 10:15 AM                           Permalink
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Adi i used these on mine
https://www.ebay.co.uk/itm/10-x-Jubilee-Hose-Clips-Mini-Hose-Clamp-Fuel-Line-Diesel-Petrol-Pipe-Clip-Clamps/114373355325?hash=item1aa12ee73d:g:SacAAOSwCh5fQ57O



i believe 8mm to 10mm i used

This message was edited by Pulse on Dec-10-20 @ 10:16 AM

annville
Dec-10-2020 @ 11:13 AM                           Permalink
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Hi Ray You shouldn't use jubilee clips on fuel hose you should use clamps these tighten/squeezes equally all around fuel hose, it should have a interference fit to the pipe, have you tried A S A P for the correct hose if no joy there is a hose supplier on water front in Yarmouth forgot name but faces dock down far end try googling.  John

annville
Dec-10-2020 @ 4:02 PM                           Permalink
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Just noticed i said Ray should have said Adrian in above reply, Sorry. John

ADI
Dec-10-2020 @ 10:27 PM                           Permalink
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Thanks for the reply's regarding the hose clips, taken on board, the search goes on for the 4mm ID hose.

Regards

Adrian  Michelle

Beck  Braydon and Mere.

Paladine
Dec-10-2020 @ 11:02 PM                           Permalink
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ADI, I have no expertise in this matter, but looking at this web site https://www.bowerspartsonline.co.uk/brands/eberspacher/fuel-system-parts I notice the Eberspacher Heater ISO7840 Marine Copper Fuel Pipe is 4mm OD and the  Eberspacher Heater Fuel Hose 3.5mm ID, so I'm wondering if you actually need 3.5mm ID tubing to provide an interference fit, as suggested annville, if, of course, you're connecting to 4mm copper tubing.

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billmaxted
Dec-11-2020 @ 9:34 AM                           Permalink
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Adrian, merry Christmas, many french classic cars use 4mm fuel lines.  You might find that specialist parts suppliers for them might be a source

Bill...(The Ancient Mardler)

annville
Dec-11-2020 @ 11:20 AM                           Permalink
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Hi Adrian As Paladin is saying if you are connecting to 4mm copper pipe 3.5mm hose would be suitable PROVIDING! you don't have to force the hose on, a genteel wiggle as you push the hose on is all that is required,  fuel hose doesn't have much give as it is reinforced and has no natural rubber in it,  when pushed on to the pipe a genteel tug with fingers shouldn't move the hose, on vehicles the hose these days is self gripping and doesn't need a clip as pipes have a ridge, boat pipes often don't so clamp is required to stop hose sliding of and for safty,   fuel tightness is by the interference fit but not so tight as to split the hose over time. John

L'sBelles
Dec-11-2020 @ 5:27 PM                           Permalink
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Surely the "fit" and "securing mechanism" is dependent upon where the hose is used.
If the hose is a feed from the tank to the suction side of whatever pump you are using then the fuel in the hose will be at low pressure and a decent fitting pipe and jubilee clip or similar will do the job. It could be a different story on the discharge side of the pump because there shall need to be sufficient pressure to atomise the fuel when it is injected into the burner.
Have you actually measured your spiggot at 4mm (5/32")? If it really is 4mm and most of the usual suppliers only offer 5mm you could contact the heater manufacturer for a supply of hose to a suitable standard.

palmtree
Dec-11-2020 @ 9:48 PM                           Permalink
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I think the pump is low pressure output and just drips the diesel onto a hot wire mesh atomizer in the heater it vaporizes and then burns. Therefore the fuel line clips found by Pulse are fine and are also the type of clamps supplied by the makers of the heaters.

Ian



annville
Dec-12-2020 @ 11:34 AM                           Permalink
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Hi Ian yes fuel supply to diesel heaters of Eberspacher, Webasto type etc are low pressure,as is the supply from fuel tanks to pumps,   high pressure FUEL supply must be by pipes with a nut and olive connection, these aren't any more leak proof than rubber hose with clamp BUT are safer as not able to come undone under pressure and flood engine room with fuel. John

palmtree
Dec-13-2020 @ 10:03 AM                           Permalink
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John/Annville, in my limited experience of Diesel heaters (the subject of this topic) i have never seen a high pressure fuel supply to them. Can you explain the type of marine heater that uses one?

Thanks

Ian

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