Speedflow 399 Series Hose End Restrictor – Installation Guide | ANFittings.co.nz
Easy Assembly Instructions for AN Hose End Restrictors (-3 and -4)
At ANFittings.co.nz, we stock the high-quality Speedflow 399 Series Hose End Restrictors, designed for precise flow control in performance hose fittings. Below is a simple step-by-step guide to help you correctly install a hose end restrictor for your AN hose system.
Step 1: Select the Correct Restrictor Size
Before beginning, disconnect the hose end from the adapter.
Choose the appropriate restrictor size for your application:
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-3 AN Hose Fitting – Use Part #399-03
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-4 AN Hose Fitting – Use Part #399-04
These restrictors are ideal for oil feed lines, fuel systems, or any application requiring controlled flow rates.
Step 2: Insert the Hose Restrictor
Gently insert the restrictor into the hose end fitting until it seats firmly.
Make sure the restrictor is:
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Properly aligned
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Fully seated in the fitting
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Secure enough that it doesn’t fall out during handling or assembly
This ensures optimal performance and prevents leaks or flow disruption.
Step 3: Reconnect the Hose End
Once the restrictor is securely in place:
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Reconnect the hose end to the adapter or male fitting
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Tighten the connection as you would in a standard AN fitting assembly
Note: These restrictors are compatible with all Speedflow AN male and female hose fittings.
Ready for Use!
Your AN hose is now equipped with a 1mm internal restrictor, providing reliable flow control for your application.
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