DIY: Make a Custom 775 Motor Power Vacuum Cleaner with High Pressure PVC Pipes and Fittings

Credit to ChannelCreative on Youtube

Building your own vacuum cleaner can be surprisingly effective when using high-pressure PVC fittings and a powerful DC motor like the 775. Below is a step-by-step guide using 247Garden's SCH80 PVC fittings, commonly used for high-pressure systems but perfect for this compact vacuum project.

Parts & Materials Needed

From 247Garden:

• 1x SCH80 2" Coupling (Main body housing)
• 1x SCH80 2" Cap (Base cap for airflow and stability)
• 1x SCH80 2" to 3/4" Reducing Coupling (Top reducer for nozzle)
• 2x SCH80 3/4" 45-Degree Elbows (Nozzle tip and handle angle)
• 1x SCH80 3/4" 90-Degree Elbow (Handle bend)
• 1x SCH80 3/4" to 1/2" Reducing Coupling (Final nozzle tip reducer)

Electronics:

• 1x 775 DC Motor (12V–24V) – brushed or brushless
• 1x Fan/Impeller (matched to 775 motor shaft)
• 1x Power switch (On/Off)
• 1x Filter Bag or HEPA Filter
• Wiring, heat shrink, and soldering tools
• 12V DC Adapter for Motor

Assembly Instructions

1. Build the Vacuum Body (Center Housing)

• Use the 2" SCH80 Coupling as the central chamber of the vacuum.
• Attach the 2" SCH80 Cap at the bottom.
  • Important: Drill air intake/exhaust holes evenly around the cap to allow airflow out of the motor chamber.
• Inside this coupling is where the motor, fan, and filter will be installed.

2. Create the Suction Nozzle

• At the top of the 2" coupling, connect the 2" to 3/4" SCH80 Reducing Coupling.
• Into that, insert a 3/4" 45-degree elbow, followed by the 3/4" to 1/2" reducing coupling to create a narrowed suction tip.
• This angled design concentrates airflow for stronger suction and easier reach into corners.

3. Assemble the Handle

• Use the second 3/4" 45-degree elbow and a 3/4" 90-degree elbow to make a comfortable L-shaped handle.
• Optional: Insert a short section of 3/4" SCH80 pipe between fittings to extend the handle.
• Secure the handle to the body using pipe glue or screws if needed.

4. Install the Motor and Fan

• Mount the 775 motor inside the 2" coupling, positioned vertically. Ensure:
  • The fan blades face the suction tip.
  • The motor is cushioned or clamped inside with vibration dampeners or a 3D-printed sleeve.
• Behind the fan, insert a filter bag or HEPA filter between the motor and base cap to catch dust before it reaches the motor.

5. Wiring the Power System

• Wire the on/off switch to the motor and power supply.
• You can mount the switch onto the handle or side of the vacuum body.
• DC adapter or equivalent battery.
• Tuck and secure wiring with heat shrink and zip ties.

6. Test and Optimize

• Power it on and test for suction.
• If airflow is weak:
  • Check for air leaks.
  • Ensure the fan is spinning in the correct direction.
  • Make sure the filter isn’t clogged.
• For better results, refine the suction nozzle with a tighter seal or extended tapering.

Safety Tips

• Always wear safety glasses when cutting or drilling PVC.
• Ensure the motor doesn’t overheat; add ventilation or use a heat sink if necessary.
• Never use for vacuuming liquids unless sealed and filtered appropriately.

Summary of Key Fittings Used

Optional Upgrades

• Add a dust chamber or removable canister.
• Use a brush attachment for cleaning upholstery.
• Mount the unit to a backpack frame for portability.

Want to get the exact fittings for this project? Check out 247Garden.com for Schedule 80 high-pressure PVC parts perfect for custom builds like this.

Let me know if you want a printable parts list or a wiring diagram!