Mailing List Message #63437
From: Finn Lassen <>
Subject: Re: [FlyRotary] Re: Fuel filter
Date: Fri, 16 Jun 2017 10:26:17 -0400
To: Rotary motors in aircraft <>
Hi Ed,

I'm not uncomfortable with hose barbs as such. All fuel lines forward of firewall are Aeoquip "hose barbs".
Considering inside area of 3/8" hose (0.11 sq in) and 80 psi (more than twice my normal operating pressure) and how hard it is to press on the hose onto the fittings, a 9 pound pressure trying to press off the hose seems minor.

I'm more concerned with the quality of the filter (can) itself. With all the high pressure car EFIs out there it should be possible to find a filter with hose barbs -- but maybe not the quality of the Aeroquip ones.


On 6/16/2017 8:55 AM, Ed Anderson wrote:
Hi Finn,

Since you appear to be uncomfortable with barb fittings, here are the ones I used for over 10 years that have a screwed on fitting, never had any problems.  Replaced them ever 2 years, cut them open and could never detect any trash in fuel system.  I started with an AC GF-481 which became hard to find and then switched to a more readily accessable NAPA filter the GF652 NAPA FIL-3481.  They do require the Saginaw fitting and an "O" ring.

Fuel Filters:          OEM Auto Fuel Injector Fuel Filters (Two in Parallel)
Type:             AC GF - 481 Pkg: 25056052 OEM:25055129 (or equivalent)
                     Replaced by GF652, NAPA FIL -3481
Fittings:         3/8 Saginaw to AN6 Adapter, “O” ring required

Best Regards


-----Original Message----- From: Charlie England
Sent: Thursday, June 15, 2017 11:29 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel filter

On 6/15/2017 7:45 PM, Finn Lassen wrote:
Still haven't found a EFI filter with hose barbs I'm comfortable with.

Some specs says paper filter, some puts the limit at 45 psi.

Can anybody recommend a filter to insert between output of HFI pumps and fuel rails?


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Have you searched for an inline fuel injection filter with NPT threads?
You can use NPT to hose barb adapters. Summit has one that looks like
the NAPA all metal filter several builders have used. It doesn't list
filter media or max psi on the site, but it might be worth a look.


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