Setting up your bigboi WashR DUO is quick and easy — just follow the steps below to ensure your unit is ready to deliver maximum performance.

Step 1: Add Oil to the Triplex Pump

Refer to the article: How to Check Your Oil Level Before Use
Make sure the breather plug is installed and the oil is at the correct level before starting the unit.

Step 2: Connect Spray Wand to Spray Gun

• Pull back the slip ring on the quick-connect socket of the pressure gun.

• Insert the quick-connect plug from the lance into the socket.

• Release the slip ring and twist slightly until you hear a CLICK.

• Pull both parts in opposite directions to confirm a secure connection.

Step 3: Attach High-Pressure Hose to Spray Gun

• Connect the quick-connect socket end of the pressure hose to the pressure gun.

• Pull on the hose to ensure it is firmly attached.

Step 4: Connect Hose and Water Supply to Pump

• Attach the other end of the high-pressure hose to the outlet on the pump. Pull down the collar, insert the connector, and release the collar. Tug to confirm it’s locked in.

• Before connecting the garden hose, inspect and clean the inlet screen.

• Run water through your garden hose for 30 seconds to flush out debris.

• Connect the garden hose (no longer than 15m and at least 12mm internal diameter) to the pump inlet by hand-tightening.

• Turn on the water supply and squeeze the spray gun trigger to purge air from the system.

⚠️ Important: Only use cold, clean mains water. Do not use standing water or draw from a tank unless properly filtered.

Step 5: Connect the Electrical Supply

• Ensure the switch is in the “OFF” position.

• Plug the power cord directly into a grounded outlet.

• Avoid using extension cords unless absolutely necessary. And if you do ONLY use Extra Heavy Duty Cables. 

Step 6: If Using an Extension Cord

• Must be IPX5-rated and extra heavy duty.

• Use the shortest possible length — longer cords require thicker gauges.

• Undersized or excessive cords may cause voltage drops, reduce motor speed, and potentially damage the unit.

Need help?

If you experience issues during setup, check our troubleshooting guide or contact our support team for fast assistance.