fuel tank breather pipe

[chrishelen]

I need to install this on my fuel diesel tank, I have told the easiest was is to drill a hole and add a ' fuel tank coupler' but I can't see how you could fit this without getting your hand inside the tank to hold the nut....
Am I missing something?

 

[David2452]

I need to install this on my fuel diesel tank, I have told the easiest was is to drill a hole and add a ' fuel tank coupler' but I can't see how you could fit this without getting your hand inside the tank to hold the nut....
Am I missing something?

Yes, there must be fittings similar to Webasto / Eber dip tubes with lobes that fit inside the tank.

 

[chrishelen]

Yes, there are fittings similar to Webasto / Eber dip tubes with lobes that fit inside the tank.

Thanks for the reply, but still unsure of how they work.

 

[pvb]

Thanks for the reply, but still unsure of how they work.

You drill a 25mm hole in the top of the tank, then the fitting slides in at an angle, and tightens up to give a seal. Here's the diagram for the Eberspacher pickup pipe; obviously a vent fitting wouldn't have the downpipe.

 

[chrishelen]

Thanks, I guess the fittings are oval to go through the drilled hole, I need a 15 mil fitting.

 

[sailorman]

why not tee into the engine supply
Ah my tank is below the engine so guess a gravity system would not work the same

 

[chrishelen]

why not tee into the engine supply
Ah my tank is below the engine so guess a gravity system would not work the same[/QUOTE
My @#@#@ surveyor wants it from the tank, venting over the side of the boat. It was the only thing he picked me up on ( smug mode).

 

[sailorman]

why not tee into the engine supply
Ah my tank is below the engine so guess a gravity system would not work the same[/QUOTE
My @#@#@ surveyor wants it from the tank, venting over the side of the boat. It was the only thing he picked me up on ( smug mode).

that will learn me to read the OP to start with. i thought from #4 you were fitting aneta

 

[Lakesailor]

My @#@#@ surveyor wants it from the tank, venting over the side of the boat. It was the only thing he picked me up on ( smug mode).

Get another surveyor.

 

[chrishelen]

Get another surveyor.

How would that help? another surveyor will have his own interpretation of the rules, its a commercial boat so not a bad outcome really.

 

[pvb]

My @#@#@ surveyor wants it from the tank, venting over the side of the boat. It was the only thing he picked me up on ( smug mode).

Are you saying your tank didn't have a vent before?

 

[Lakesailor]

How would that help? another surveyor will have his own interpretation of the rules, its a commercial boat so not a bad outcome really.

I know of a certain operator that changed to a symapthetic surveyor, which saved them thousands of pounds. Obviously I can't mention names.

 

[William_H]

Surely the tank has a filler at the top of the tank. A tee or tap into this pipe at the top of the tank would surely be the same thing? Or is he that pedantic? good luck olewill

 

[vyv_cox]

Surely the tank has a filler at the top of the tank. A tee or tap into this pipe at the top of the tank would surely be the same thing? Or is he that pedantic? good luck olewill

My thought too. I investigated this a few years ago and found that itis possible to buy fillers with a Tee for a vent incorporated. No good in my case because the filler is higher than the vent on my boat but could well work for the OP and far easier than cutting a hole in the tank.

 

[chrishelen]

Surely the tank has a filler at the top of the tank. A tee or tap into this pipe at the top of the tank would surely be the same thing? Or is he that pedantic? good luck olewill

the tank has a vent hole in the filler cap which vents into the aft void...but your idea is a good one.. I don't want to drill holes in my tank if I can help it.

 

[chrishelen]

I know of a certain operator that changed to a symapthetic surveyor, which saved them thousands of pounds. Obviously I can't mention names.

are there such beasts?

 

[William_H]

the tank has a vent hole in the filler cap which vents into the aft void...but your idea is a good one.. I don't want to drill holes in my tank if I can help it.

Ah I see he wants the vent to go overboard. So you need to seal up the vent in the cap then tee off the filler pipe to an overboard vent. Which can double nicely as an overflow for when filling. I would hope this arrangement will meet with standards olewill

 

[rogerthebodger]

" My @#@#@ surveyor wants it from the tank, venting over the side of the boat. It was the only thing he picked me up on "

Anywhere that as anti pollution laws would outlaw that at if you overfill tour tank it could cause fuel to be discharged into the water.

Get a new surveyor or get him to agree to pay for any fines that could be imposed on you.

 

[parbuckle]

I always thought that the purpose of a vent was to let air into the tank to equalize pressure not to let fuel out I think there are various types of valve end fittings for this purpose. I have crewed on a vessel with inverted U vents exiting on deck in theory they looked good but in serious heavy weather they became occasionally submerged taking in large amounts of the briny
something the designer thought could never happen.