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Old 01-12-2024, 04:49 PM   #1
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fuel diverter

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ID:	144998There is a supply line directly from the starboard side tank (to the gen. racor, see the photos attached). if I want to add two more supply lines to two diesel heaters, is there some fittings that can do this? or is a fuel manifold the way to go?
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Old 01-12-2024, 04:55 PM   #2
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Photos???
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Old 01-12-2024, 05:01 PM   #3
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Photos???
there is some latency in cache. photos will show up if you refresh the page

why is there a what looks like a flare nut on top of the hose barb?
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Old 01-12-2024, 05:16 PM   #4
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Ok, so clearly that's not OEM. Running over a wire, Teflon tape in a fuel system, and who knows what else, would give me pause.

The more devices you add to a fuel system, the more problems you will have diagnosing system related fuel failures. If you want to utilize the Racor, a generator,
and several diesel heat, I would go into a manifold that has shutoff valves for each line. That would be much easier to isolate fuel problems in the future.

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Old 01-12-2024, 07:08 PM   #5
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Do you use pipe dope only to seal fuel pipes?
I remember yellow Teflon tape is for fuel pipes. Do you use it?


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Originally Posted by O C Diver View Post
Ok, so clearly that's not OEM. Running over a wire, Teflon tape in a fuel system, and who knows what else, would give me pause.

The more devices you add to a fuel system, the more problems you will have diagnosing system related fuel failures. If you want to utilize the Racor, a generator,
and several diesel heat, I would go into a manifold that has shutoff valves for each line. That would be much easier to isolate fuel problems in the future.

Ted
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Old 01-12-2024, 07:20 PM   #6
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The yellow tape is for natural gas and propane. For liquid fuels dope is a better choice as it's less likely to shed debris into the fuel system.
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Old 01-12-2024, 07:32 PM   #7
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Originally Posted by paulga View Post
Do you use pipe dope only to seal fuel pipes?
I remember yellow Teflon tape is for fuel pipes. Do you use it?
No, I only use diesel fuel rated paste sealant for the reasons stated by Rslifkin.

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Old 01-12-2024, 07:59 PM   #8
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Do you mean to connect the manifold after the gen racor? Could that make the diesel heaters run too lean if both are working in parallel?



Quote:
Originally Posted by O C Diver View Post
Ok, so clearly that's not OEM. Running over a wire, Teflon tape in a fuel system, and who knows what else, would give me pause.

The more devices you add to a fuel system, the more problems you will have diagnosing system related fuel failures. If you want to utilize the Racor, a generator,
and several diesel heat, I would go into a manifold that has shutoff valves for each line. That would be much easier to isolate fuel problems in the future.

Ted
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Old 01-12-2024, 08:32 PM   #9
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Pretty sure that's a Racor 500. It has a maximum flow rate of 60 GPH. Not sure what size generator you have, but my 9 KW Onan burns maximum a gallon an hour and returns maybe 10 gallons per hour to the fuel tank. I think you will be fine. What size fuel hose from the tank to the Racor? Do your heaters return fuel to the tank? Hard to imagine your heaters burning more than 1 GPH (138,000 BTUs in a gallon of diesel).

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Old 01-12-2024, 08:55 PM   #10
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Rectorseal 5 has more than one product
I have 25790

Quote:
Originally Posted by rslifkin View Post
The yellow tape is for natural gas and propane. For liquid fuels dope is a better choice as it's less likely to shed debris into the fuel system.
Is this one rated for fuel pipes?
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Old 01-12-2024, 09:01 PM   #11
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Then it should work fine.
Westerbeke 6kw, but I don't need the gen and diesel heater to run together.



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Pretty sure that's a Racor 500. It has a maximum flow rate of 60 GPH. Not sure what size generator you have, but my 9 KW Onan burns maximum a gallon an hour and returns maybe 10 gallons per hour to the fuel tank. I think you will be fine. What size fuel hose from the tank to the Racor? Do your heaters return fuel to the tank? Hard to imagine your heaters burning more than 1 GPH (138,000 BTUs in a gallon of diesel).

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Old 01-12-2024, 09:10 PM   #12
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Does the manifold install with control valves and a priming pump?
Is there assembled product available?

Quote:
Originally Posted by O C Diver View Post
Ok, so clearly that's not OEM. Running over a wire, Teflon tape in a fuel system, and who knows what else, would give me pause.

The more devices you add to a fuel system, the more problems you will have diagnosing system related fuel failures. If you want to utilize the Racor, a generator,
and several diesel heat, I would go into a manifold that has shutoff valves for each line. That would be much easier to isolate fuel problems in the future.

Ted
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Old 01-12-2024, 10:46 PM   #13
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Originally Posted by paulga View Post
Does the manifold install with control valves and a priming pump?
Is there assembled product available?
A search for "diesel fuel manifold " retuned this:

https://shop.keenanfilters.com/produ...water-manifold

They offer 2 and 4 valve models also. The outlets are 1/2" pipe thread, but bushings are in expensive.

There are other manufacturers that are quite a bit more expensive.

Regarding your heaters, you probably need to identify your make and model. If it doesn't have its own fuel pump and is gravity fed, that will require a more complicated setup.

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Old 01-12-2024, 11:15 PM   #14
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what couplings and hose should connect from the racor outlet to the manifold inlet? and how does the original racor outlet rubber hose hook onto one of the three ports?

I'm planning to install a Chinese diesel heater that is said to be a copy of Espar d4. d4 has a fuel pump that can extract fuel from a source within 6' distance and send the fuel up to 20' away. so it's not gravity feed.


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Originally Posted by O C Diver View Post
A search for "diesel fuel manifold " retuned this:

https://shop.keenanfilters.com/produ...water-manifold

They offer 2 and 4 valve models also. The outlets are 1/2" pipe thread, but bushings are in expensive.

There are other manufacturers that are quite a bit more expensive.

Regarding your heaters, you probably need to identify your make and model. If it doesn't have its own fuel pump and is gravity fed, that will require a more complicated setup.

Ted
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Old 01-13-2024, 07:18 AM   #15
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what couplings and hose should connect from the racor outlet to the manifold inlet? and how does the original racor outlet rubber hose hook onto one of the three ports?

I'm planning to install a Chinese diesel heater that is said to be a copy of Espar d4. d4 has a fuel pump that can extract fuel from a source within 6' distance and send the fuel up to 20' away. so it's not gravity feed.
The Racor outlet has an adapter to hose barb that should be sufficient depending on where the manifold is placed. The manifold inlet is either 3/8" or 1/2" pipe thread. So an adapter from that to the same size hose barb as the Racor outlet will be required. You will also need adapters from the manifold outlet valves to hose barb. You should buy Coastguard approved diesel fuel hose to run between the various connections. If you're not familiar with plumbing diesel fuel lines, it would be advisable to seek qualified help on proper techniques (such as no Teflon tape).

If each heater and the generator have their own fuel pump, flow shouldn't be an issue. One final thought, if running fuel line through bulkheads (such as your generator), hose by it self could easily be a braided by the bulkhead material. Metal pipe through the bulkhead is a better choice.

Ted
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Old 01-13-2024, 10:38 AM   #16
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does a manifold also need a bleeding pump to prime?

Quote:
Originally Posted by O C Diver View Post
The Racor outlet has an adapter to hose barb that should be sufficient depending on where the manifold is placed. The manifold inlet is either 3/8" or 1/2" pipe thread. So an adapter from that to the same size hose barb as the Racor outlet will be required. You will also need adapters from the manifold outlet valves to hose barb. You should buy Coastguard approved diesel fuel hose to run between the various connections. If you're not familiar with plumbing diesel fuel lines, it would be advisable to seek qualified help on proper techniques (such as no Teflon tape).

If each heater and the generator have their own fuel pump, flow shouldn't be an issue. One final thought, if running fuel line through bulkheads (such as your generator), hose by it self could easily be a braided by the bulkhead material. Metal pipe through the bulkhead is a better choice.

Ted
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Old 01-13-2024, 10:47 AM   #17
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does a manifold also need a bleeding pump to prime?
No, the generator will do it.

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Old 01-13-2024, 11:00 AM   #18
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I would have to drain the Gen. racor (or drain ~1/2) for changing the hose connections
this racor does not have a bleeding pump
last month when I changed this racor filter, I had to fill it up using a disposable cola cup
do you mean I could have run the genny to prime the (empty) racor? with the manifold installed, the genny fuel pump can prime the manifold as well?


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No, the generator will do it.

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Old 01-13-2024, 11:59 AM   #19
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I would have to drain the Gen. racor (or drain ~1/2) for changing the hose connections
this racor does not have a bleeding pump
last month when I changed this racor filter, I had to fill it up using a disposable cola cup
do you mean I could have run the genny to prime the (empty) racor? with the manifold installed, the genny fuel pump can prime the manifold as well?
Not familiar with your specific generator, but all manufacturers have a provision for pulling fuel through the fuel lines to prime the lift pump and injector pump. My Onan has an electric lift pump that can be run without cranking the engine. My John Deere main engine has a lever on the side of the lift pump that allows you to pump the lift pump without cranking the engine. I would consult your owner's manual for changing the fuel filter on the engine or bleeding the system.

If you don't have the owner's manual, many are available online as a PDF or from the manufacturer.

Ted
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Old 01-13-2024, 01:44 PM   #20
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I found the priming section from westerbeke 6.0bcd manual. is pressing the preheat button 20 seconds, maybe several 20s needed, how you prime without starting the engine?

"peaheat" is not "cranking", so it does not run the sea water pump at the same time, right?

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Quote:
Originally Posted by O C Diver View Post
Not familiar with your specific generator, but all manufacturers have a provision for pulling fuel through the fuel lines to prime the lift pump and injector pump. My Onan has an electric lift pump that can be run without cranking the engine. My John Deere main engine has a lever on the side of the lift pump that allows you to pump the lift pump without cranking the engine. I would consult your owner's manual for changing the fuel filter on the engine or bleeding the system.

If you don't have the owner's manual, many are available online as a PDF or from the manufacturer.

Ted
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