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Discharge Nipple AN4022-1

Part# AN4022-1
MFR Model# AN4022-1


AN Fittings. Discharge Nipple AN4022-1.
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Just what the doctor ordered to replace the primer nozzle on my C-150

Cowans A Verified Purchase


May 5, 2022

Things were great and just in time.

November 17, 2017

I used this as part of a primer line installation on a 0-320 Lycoming. It worked well, the challenge was attaching the cone to the copper tubing, a machine shop had to braze it. The nozzle ports needed a 1/8 npt tap run down the cylinder to allow enough thread engagement for the nozzle. They did come well packaged. The copper tubing is challenging to flare since it is so small, re-doing a flare was needed to make a leak free connection.

David S
December 31, 2020

Please see review for the Ferrell nut. That review is for this product.

Charles M
February 11, 2021


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: Is the AN4022-1 discharge nipple, brass, aluminum or steel?

AN4022-1 would be brass.

Q: What are the thread sizes on both ends of this discharge nipple AN4022-1?

1/8 NPT on the cylinder end and 5/16-32 on the primer line end.

Q: Whats the difference between AN4022-1 and AN780-2 ?

They are the same sizes, but the an4022-1 has the restrictor as shown in the photo on the web.

Q: What do you use to solder the cone on the copper line?

Most use a 60/40 straight solder.

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