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Step by step guide

Pressure Gun PG4 (PG1): Replace Internal Pipe & Brass valve

Learn how to easily replace an Internal Pipe on your PG4/PG1 pressure gun with this step-by-step guide. All you need are a Phillips screwdriver and a new Internal Pipe 95-100-759  Kit: 95-100-562 / 95-100-555. Safety first! To prevent any accidents, ensure that your pressure gun is disconnected from your  pressure washer.

1. Overview of components

a)Internal pipe 95-100-759  Kit: 95-100-562  95-100-555


b)O-ring 5*1.5 NBR90 95-100-351  Kit: 95-100-562 / 95-100-759 / 95-100-760


c)Brass valve 95-100-557  Kit: 95-100-563


d)Hose release knob 95-100-556  Kit: 95-100-562


e)Hose lock clip 95-100-554  Kit: 95-100-562


f)Safety lock 95-100-551


g)Zero force locking tab 95-100-549


h)Rubber buffer 95-100-552


i)Gun cover left 95-100-543


j)Gun cover right 95-100-553

2. Remove top cover (right cover)

Lay the pressure gun with screw heads facing upwards.


a)Unscrew 8 screws (Phillips screwdriver).


b)Lift away the Right cover.

3. Pull out the Internal Pipe

When replacing only the internal pipe you can do as follow:


a)Place your right tomb on the Brass Valve and hold it downwards.


b)Gently, bend the pipe upwards and pull it out of the valve.


c)The hose release knob (green 'push button') can remain in the left cover.

4. Pull out the Internal Pipe + Brass Valve

When replacing both the internal pipe and the Brass Valve you must pull out the entire assembly:

5. Disassembly the Valve system

a)Aluminium injector 95-100-558  Kit: 95-100-563


b)Trigger valve spring 95-100-545

6. Move the Hose lock clip to the new pipe

Check the O-ring for visual damage.

7. Insert a new Internal Pipe

a)Place your right tomb on the Brass Valve and hold it downwards.


b)Gently, stick the pipe end (O-ring part) into the Brass Valve and lift the valve upwards.


c)Push the pipe into the Brass Valve and press it down into its belonging groves.


d)Adjust the Hose release knob so it fits onto the pipe and the Hose lock clip .

8. Insert the new Internal Pipe + Brass Valve

When inserting both the pipe and the valve you can do as follow:

a)Assemble the Valve system


b)Place the components together into the left cover. Ensure that each shaft is placed in its respective groove.


c)Adjust the Hose release knob so it fits onto the pipe and the Hose lock clip .

9. Focus areas during assembly

When putting on the right cover you must consider that some components have shafts that should fit into hollows in the covers.

10. Assembly tip

Use your finger to gently press downward on the green trigger. This helps keep the components in place when placing the right cover on top of the left cover.

11. Install the Right Cover

a)Press the Right Cover onto the Left Cover. Consider the focus areas.


b)Fasten the right cover with 8 Phillips screws.