How to Fit Teflon Hose Fittings

All our customers get the option to have hose ends fitted for free but for those of you who want to know How to Fit them there is this article. We will show you how to fit hose end fittings with our graphic step by step guide. The images and content are taken from our free eBook.

Hose ends are available in various materials, Aluminium, ENS steel and Stainless Steel. What you read here can be applied to them all.

On this page we cover the following:

  • The Tools you will need to do the job
  • A step by step guide

Tools to do the job

Nothing specialist required. This is the list:

  • A bench mounted vice
  • Good quality (polished face) imperial sized spanners. These should not mark the anodised finish
  • A small amount of light oil
  • A method of cutting the Teflon Hose, typically most people (at home) would use a fine tooth saw such as junior hacksaw
  • Small screwdriver or pick
  • Masking tape
  • Pliers and snips
  • Stanley knife
  • Gloves and glasses for protection/safety
  • Cloth to wipe off excess oil
  • Vice Jaws

A Step by Step Guide

Lets go though this step by step. It’s as much about attention to detail and being tidy as anything else. Follow these steps to fit your Teflon hose ends.


Step 1 

Identify where the cut needs to be and mark it by wrapping some masking tape around the hose and using a pencil to show the exact position. The masking tape also stops the stainless steel braid from flaring during and after the cut.

Hold the Teflon hose securely and without crushing it. This is a suitable job for the vice jaws. It is important to cut the hose square. Do not force the blade, just apply some light to medium pressure and let blade do the cutting – do not force it. Once the Teflon hose is cut clean away all dust and particles. Check the cut end is free from any debris or stray stainless steel braids (trim with snips)


Step 2 

Lets fit the Teflon hose end socket nut over the end of the Teflon hose. Check that the Teflon hose isn’t out of shape after being cut. You can use pliers to gently squeeze the hose into shape. Then trial fit the Teflon hose end in the end of the hose. Once OK place the hose end to one side for the moment. Be sure the socket nut is the right way around before we go any further. Remove the masking tape.


 Step 3 

We need to coax the stainless steel braid away from the Teflon tube to allow the olive to fit. Use a small screwdriver or pick to do this. Take care  not to damage the Teflon tube when doing this.


 Step 4 

We need to be sure no stainless steel braid get trapped under the olive – that’s the most important part of this step. Push the olive under the stainless steel braid. Push the olive home using a flat surface (a small piece of wood), do not hit it or tap it – it does need that sort of effort. Inspect inside the end of the olive to be sure hose butts up tight against the inside shoulder of the olive.


 Step 5 

Apply plenty of light oil to the threads on the socket nut the hose end. Insert the hose end into the hose by holding the hose and pushing the hose end nipple into the tube. This will require a firm twisting and pushing action, you should not need any excessive force. Check it is in as far as it will go.


Step 6 

This is where the vice Jaws really help out. Secure the socket nut in the vice jaws and start the hose threads into the socket nut. Take care to keep the assembly in line as you do this. You will find you can get a few turns before you need to use a spanner.


Step 7

Using the correct imperial spanner, tighten the hose end into the socket nut. Apply drops of oil to the thread as you tighten up the fitting. Continue to tighten the Teflon hose end into the socket until you have a gap of approximately 1.00mm. Align the flats for a professional finish.


Important

Do not re-use the Olive in a hose end. It can only be used once. Replacements are available if required.