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Fisher & Paykel Product Help

Installation instructions

Before you begin

Please read these installation instructions completely and carefully.

  • The following installation instructions are intended as a general guide.
  • Please ensure that the waste disposal unit is installed according to local building codes for your area.
  • Installation is recommended to be done by a qualified plumber or installer.
  • Product failure due to improper installation is not covered under the Warranty.


Removing an existing waste disposer, if installed

  1. Disconnect electrical power supply to existing disposer.

  2. Remove old disposer or sink flange assembly.

  3. Inspect drain line. If it is heavily coated with hardened grease and accumulations, clear out the build-up using a plumber’s rod or auger.

  4. Remove old sealing materials and gaskets from sink opening, both top and bottom.

What you will need

  • Phillips screwdriver
  • Flat blade screwdriver
  • Steel Punch or wooden dowel Petroleum jelly or liquid soap
  • Plumber’s Putty

Top and bottom of sink and sink flange surfaces must be free of any materials to prevent leaks.

Unpacking your waste disposer

  1. Remove the waste disposer from the packaging.

  2. Identify and check that all components are included in the carton before beginning the installation (fig. 1).

  3. Take care not to misplace any of the components.


  1. Stopper

  2. Sink flange

  3. Rubber gasket

  4. Flange ring

  5. Protector ring

  6. Mount ring

  7. Screw clamp

  8. Hopper with splash guard

  9. Dishwasher discharge inlet

  10. Drain housing

  11. Reset button

  12. Built in air-switch

  13. Lower shell

  14. End Bell (Electrical Connections)

  15. Power cord

Fig 1. 3-801t Mount System

  1. Outlet gasket

  2. Discharge waste elbow

  3. Waste elbow flange nut

Fig 1.2. Elbow.png
Fig 1.2. Elbow

Installing the waste disposer

  1. Loosen the clamp screw to allow the mounting system to be removed from the unit (fig.2).

Fig. 2system from the waste disposer.png
Fig. 2 Removing the mounting system from the waste disposer
  1. Turn the mounting assembly over and remove the flange ring from the track on the sink flange. Undo the three screws holding it together. This will allow the sink flange, mount ring, and protector ring to separate (fig 3).
    Use the flat blade screwdriver as a lever if required.

Fig. 3mounting systemDisassembling the.png
Fig. 3 Disassembling the mounting system
  1. Apply a small amount of plumbers putty to the lip of the sink flange and position the sink flange into the sink drain hole ensuring that the rubber gasket on the underside of the sink flange is firmly in place (fig.4).
Fig. 4sink drain hole.png
Fig. 4 Fitting the flange into the sink drain hole
  1. Approaching from under the sink, slide the protector ring and mount ring onto the underside of the sink flange. Fit the flange ring into the track on the sink flange, then tighten the 3 mounting screws evenly and securely (fig.5).


Ensure that the mounting assembly connection is fixed securely and tightly.

No dishwasher connection required
If a dishwasher is not being connected to the waste disposer, please proceed to step 7.

Connecting to a dishwasher
If you are connecting to a dishwasher, please continue with steps 5 & 6.



Fig. 5to the underside of t.png
Fig. 5 Fixing the mounting system to the underside of the sink

  1. Using a blunt instrument (steel punch or wooden dowel), knock out the entire plug at the end of the dishwasher drain inlet (as shown in fig.6). Do not use a screwdriver or sharp instrument. When the knockout plug falls into disposer, you may remove it or simply grind it up when the disposer is used. This will not damage the disposer in any way, but may take some time to grind, over the course of several uses.

  2. Connect the dishwasher drain hose to the dishwasher inlet pipe on the waste disposer (fig. 6). Use a clamp to ensure a tight seal. A stepped rubber adaptor (not supplied with the product) may be required if the diameter of the drain hose is larger than the diameter of the waste disposer’s inlet connection.

Fig. 6dishwasher.png
Fig. 6 Connecting to a dishwasher (if required)
  1. Connect the discharge elbow to the lower outlet on the waste disposer (fig. 7).
  2. Prior to connecting the waste disposer to the mounting assembly, press firmly down on the rubber splash guard to check that is firmly fitted onto the neck of the hopper.

  3. Lubricate the top lip and angled surface of the rubber splash guard with liquid soap or petroleum jelly (fig. 8 ).


Please do not remove clamp and splash guard from hopper. Both parts are factory installed and installation ready.


Fig. 7 Connecting the discharge elbow.png
Fig. 7 Connecting the discharge elbow

Fig. 8splash guard.png
Fig. 8 Lubricate the rubber splash guard

  1. Align the discharge elbow up with the waste pipe (refer to fig.11) so that the waste disposer is correctly positioned, prior to engaging with the mounting assembly.
  2. Guide the waste disposer up to the sink flange (fig. 9). Engage the groove of the splash guard around the ridge at the bottom of the sink flange. A slight rocking motion may be required to help ensure a proper fit.

Engage the waste disposer.png
Fig. 9 Engage the waste disposer
  1. While still supporting the body of the waste disposer, tighten the screw clamp around the rubber splash guard (fig.10). The waste disposer will now hang by itself.
  2. Connect the discharge elbow up with the waste pipe (fig.11) and tighten the slip nut on the drain pipe.


If you need to rotate the waste disposer to connect with the waste pipe, it is important to make sure the sink flange does not turn. Movement of the sink flange will break the seal created when installed. If this occurs, disengage the waste disposer from the discharge elbow and mounting assembly Return to step 10 to realign the waste disposer before repeating steps 11-13.


Ensure that the reset button is readily accessible after installation of the waste disposer.

Tightening the clamp.png
Fig. 10 Tightening the clamp

Connecting the drain.png
Fig. 11 Connecting the drain outlet

Installing the air-switch (optional)

  1. Select a location on the bench top for the air switch to be positioned (recommended position is near the sink). Mark and cut a hole, 33mm in diameter, in the bench top.
  2. Remove the nut from the thread of the air switch (fig.12).
  3. Feed one end of the PVC tubing up through the cutout, from the underside of the bench top, and attach to the underside of the push button.
  4. Insert the push button into the bench top cut out (fig.12). Feed the PVC tube through the nut. Screw the nut onto the thread tightly (fig.13), securing the push button tightly onto the bench top.

Do not use a wrench to tighten the nut.

  1. Connect the other end of the PVC tubing to the air switch outlet, located on the underside of the waste disposer (fig.14).

Fitting the air switch.png
Fig. 12  Fitting the air switch

Securing to the bench top.png
Fig. 13 Securing to the bench top

switch outletConnecting tube to air.png
Fig. 14 Connecting tube to air switch outlet 

Controlling the waste disposer by a wall mounted switch

The waste disposer can be controlled by means of a wall mounted switch rather than the bench mounted air switch supplied with the product.

To use an existing wall mounted switch:

  1. Connect one end of the PVC tubing to the underside of the air switch button.
  2. Connect the other end of the PVC tubing to the air switch outlet on the underside of the waste disposer (as shown in fig.14).
  3. Press the button on the air switch to activate the waste disposer.
  4. Whilst the waste disposer is running, disconnect the PVC tubing from the air switch outlet on the underside of the waste disposer.
  5. Turn the waste disposer off using the wall mounted switch. The waste disposer can now be turned on and off using the wall mounted switch. 
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