Waterpik Wp 100W Pressure Pump O Ring Replacement Repair Guide

Difficulty

Moderate

Steps

Time Required

                          30 minutes

Sections

Pressure Pump O-rings
10 steps

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Introduction

What you need

Step 1

              Pressure Pump O-rings

Make sure the Waterpik is unplugged and away from any electrical outlet.
To prevent electrical shock never begin repairs on device while it is plugged in.
Remove top tool tray and water tank.
Laying the unit over on its back remove the four #1 Phillips 6mm screws.

Make sure the Waterpik is unplugged and away from any electrical outlet.

To prevent electrical shock never begin repairs on device while it is plugged in.

Remove top tool tray and water tank.

Laying the unit over on its back remove the four #1 Phillips 6mm screws.

1024

Step 2

Remove the two #1 Phillips 4mm screws from the pressure hose housing.
Using a flattip screwdriver gently pry the pressure hose housing from the base of the unit.
Use gentle pressure when removing pressure hose housing. Excessive force could damage unit.

Remove the two #1 Phillips 4mm screws from the pressure hose housing.

Using a flattip screwdriver gently pry the pressure hose housing from the base of the unit.

Use gentle pressure when removing pressure hose housing. Excessive force could damage unit.

Step 3

Using an o-ring removal tool or a small flattip screwdriver carefully remove o-ring from pressure pump housing by gently prying the o-ring over the lip of the housing.

Using an o-ring removal tool or a small flattip screwdriver carefully remove o-ring from pressure pump housing by gently prying the o-ring over the lip of the housing.

Step 4

Insert a small flattip screwdriver into the seam at the base of the unit and gently pry the lower housing from the main body.
Using a small punch or head of the Phillips screwdriver push through rubber nipple on lower housing.
May require some force to push rubber nipple through.
Separate lower housing from main body.

Insert a small flattip screwdriver into the seam at the base of the unit and gently pry the lower housing from the main body.

Using a small punch or head of the Phillips screwdriver push through rubber nipple on lower housing.

May require some force to push rubber nipple through.

Separate lower housing from main body.

Step 5

Using a flattip screwdriver or flat pick inserted between the plastic bezel and pressure knob gently pry the knob from main body.
Work in a circular motion around the knob carefully applying pressure until the gauge comes off by hand.
Excessive force can result in damage to the knob or the main body.
The on/off rocker switch does not need to be removed as it does not interfere with the removal of the internal unit.
Place unit upright and remove main body from internal unit.

Using a flattip screwdriver or flat pick inserted between the plastic bezel and pressure knob gently pry the knob from main body.

Work in a circular motion around the knob carefully applying pressure until the gauge comes off by hand.

Excessive force can result in damage to the knob or the main body.

The on/off rocker switch does not need to be removed as it does not interfere with the removal of the internal unit.

Place unit upright and remove main body from internal unit.

Step 6

Remove the three #1 Phillips 4mm screws from the Pump inlet housing.
Remove the pump inlet housing from the inlet tube.

Remove the three #1 Phillips 4mm screws from the Pump inlet housing.

Remove the pump inlet housing from the inlet tube.

Step 7

Using an o-ring removal tool or small flattip screwdriver, gently pry the o-ring from the pump inlet housing.
Once you get the tool under the o-ring use a circular motion as you pry and the o-ring will slide off easily.
Using your hands roll the o-ring down the body of the inlet housing and remove.

Using an o-ring removal tool or small flattip screwdriver, gently pry the o-ring from the pump inlet housing.

Once you get the tool under the o-ring use a circular motion as you pry and the o-ring will slide off easily.

Using your hands roll the o-ring down the body of the inlet housing and remove.

Step 8

Remove the two #1 Phillips 3mm screws from the on/off switch.
Remove the switch from its housing.

Remove the two #1 Phillips 3mm screws from the on/off switch.

Remove the switch from its housing.

Step 9

Locate the o-ring at the base on the inlet tube.
Using an o-ring removal tool or a small flattip screwdriver gently remove the o-ring from the pump inlet housing.
Placing the removal tool under the o-ring and against the inlet tube wall you can pull the o-ring out easily.

Locate the o-ring at the base on the inlet tube.

Using an o-ring removal tool or a small flattip screwdriver gently remove the o-ring from the pump inlet housing.

Placing the removal tool under the o-ring and against the inlet tube wall you can pull the o-ring out easily.

Step 10

Using your fingers set the new O-ring over the pump inlet housing.
Use the removal tool to set the new o-ring at the base of the inlet tube.
It is not critical that the new o-ring is placed exactly at the base of the inlet tube. As long as the o-ring is flat when the inlet housing is reinstalled it will index the lower o-ring to its proper location.

Using your fingers set the new O-ring over the pump inlet housing.

Use the removal tool to set the new o-ring at the base of the inlet tube.

It is not critical that the new o-ring is placed exactly at the base of the inlet tube. As long as the o-ring is flat when the inlet housing is reinstalled it will index the lower o-ring to its proper location.

To reassemble your device, follow these instructions in reverse order.

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Author

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                    Jereme Nereaux

Member since: 09/26/2018

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Team

                       Eastern Washington University, Team S3-G5, Crane Fall 2018                        

                                                  Member of Eastern Washington University, Team S3-G5, Crane Fall 2018 



                    EWU-CRANE-F18S3G5                     


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                                            2 Guides authored

Elizabeth - Apr 30, 2019

How would I know that my waterflosser needs Pressure Pump O-ring Replacement?

Elizabeth - May 2, 2019

can we replace the handle of waterflosser? I tried to remove it but failed. some tips for this would be aprreciated.

Steven Holbourne - Mar 31, 2022

The handle/hose assembly comes off as per step 2. Replacements are available

panka - Sep 13, 2019

quel est le code couleur de la résistance, merci.

Bob Neal - Nov 10, 2022

Do you know if there is a replacement kit with the O-rings.

Robert

Introduction#

What you need#

Team#

Introduction

What you need

Team