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Part# 05-11467
MFR Model# V3-4-P-C
DescriptionPositionPart Number
SPRL V3-4P-C Duplex fuel valve with conforming selectorOff - Left Tank - Right Tank - Both Tanks05-11467


The V3 valve is a development of V1 with a simple return system tapped 1/8” NPT for standard AN-4 or other pipe fittings.

It has been used as a return for trapped air or low volume fuel from carburettors, it is not suitable for most current fuel injection systems. There may be some cross feed on the return as it is a very simple drum valve for low pressures and volumes.

The main valve uses the range of special SPRL pipe fittings, see the accessories tab for details.

Available as –3P (3 Port) with LEFT-RIGHT-OFF or –4P (4 Port) with LEFT-RIGHT-BOTH-OFF positions.

Note: The main valve comes with 3 AN-6 male adaptors, see "Accessories" tab for other available fittings. Must use Newton fittings. Standard AN Fittings do not fit except on the return system.

  • Rotax now specify -6 as the minimum pipe size for all their engines, supply and return.
FAR 23
  • The SPRL Valves, as designed, have a very nice 'feel' and are logical in use, many pilots prefer our standard with a lift and turn between selections. However there is a requirement in FAR 23 whereby the fuel valve must be turned from OFF to an ON selection simply by turning it, i.e. it should not have to be lifted up, pushed down etc, and it should also not be possible to turn it from an ON position to OFF without a detent. See V1/V3/V4V9 and V10 valves with a 'conforming' selector and –C in the part number.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. www.P65Warnings.ca.gov


  • Weight 250 grams 7 ounces
  • Size 2.4 inch diameter x 2.6 inch deep under the flange
  • FAR 23 conforming available upon request

In The Box

  • Supplied with 3 x –6 fittings, other fittings available– as shown nearby. The return is tapped 1/8 inch NPT.
  • Accessories
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looks good

Robin S Verified Purchase


November 24, 2022

hi, l designed V3 a long time ago, and, at the time it was a low cost solution to the duplex valve market, better than the alternative. We will look at the Spruce text again later but 1/8 npt lines are outdated and give the clue that return is limited. Rotax demand -6 both ways for all their engines and generally fuel pumps run at pressures that defeat the simple drum valve on V3. Our current V9 and V10 are appropriate for most engines and return systems with the unique V10 offering overpressure protection on closedown. RV

Robin V
August 4, 2020

The return ports on this valve are tiny. As fuel injected engines can return a majority of fuel sent, I am not sure these ports can handle the volume. The listing should be clear about this.

Edward W
July 27, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Are the [NPT 1/4 FEMALE FITTINGS SPRL Part No. 05-04454] compatible with Newton fuel valves V3?

Yes, all the fittings listed as accessories will fit both valves.

Q: Note: The main valve comes with 3 AN-6 male adaptors, see Accessories tab for other available fittings. Must use Newton fittings. Standard AN Fittings do not fit except on the return system. And then this: The return is tapped 1/8 inch NPT. There seems to be conflicting information here - which is it, 1/8 NPT on the return or AN fittings? Ive bought 3 sets of 1/4 NPT to AN and havent gotten one that fits yet for the return line.

Yes the V3 comes with 3 x AN6 fittings for the supply side. The return is tapped 1/8npt so you can use standard AN fittings, you don't need special Newton branded fittings.

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