Sprayer Depot Blog

The pressure switch is by far the most overworked part of your pump. It is constantly running which makes its life expectancy shorter compared to other parts. If you notice that the pressure has decreased, the switch leaks or if your pump won't run or won't shut off then you might need to replace the pressure switch. Replacing the switch is an easy and inexpensive DIY project that will save your equipment unnecessary downtime.

What You'll Need:

Pressure Switch Assembly Kit

Drill/Screwdriver

Installation Process: 

1. Unplug the red power supply wires and inspect them for possible burnt-out*

2. Unscrew the 3 screws to remove the pressure switch

3. Remove the old diaphragm and replace with new one making sure it is flush**

4. Screw the pressure switch back in place

5. Reconnect the power source wires and you are done!

*Kit includes replacement wires 

** An optional Teflon seat is included

Shurflo Pressure Switch Repair - 8000 Series         
This repair uses the Shurflo Switch Assembly #9437506

Follow these 5 easy steps to repair a Shurflo Pressure Switch on a 8000 series pump:

1. Remove the two power source wires- inspect them to see if one has burned out. ( If so, the kit comes with a replacement wire )
2. Remove the three screws: there's one long and two short screws
3. Remove the pressure switch
4. Take out the diaphragm insert. There will be three pieces.  Reinsert the spring holder and the spring. Next, insert the new seat from the repair kit ~ Make sure it sits flush.  You can also insert the teflon seat, which is optional
5. Replace the trigger switch and tighten all three screws.  Finally, hook the power souce back up