We recommend the Oasis 12v 3700GPH pump. During development, we iterated dozens of our nozzle designs with different Venturi jet and pump impeller configurations. After 100’s of hours of real-world testing (in the field) with different pumps & voltages at different head (height) and with different material composition, we’ve found the Oasis Marine 3700 GPH 12v Bilge Pump to offer the best balance of performance, durability and value. They have proven very reliable after years of use. This is the same pump we recommend to use with the GoldiBox Backpack Dredge and is the pump we use. We include a free adapter that is designed to fit this pump and the recommended 1.25″ hose.

Amazon Link: Oasis Marine 3700 GPH 12v Bilge Pump

The GoldiBox Dredge Nozzle requires two hoses.

The first is the pressure hose which goes from the pump to the nozzle. The pressure hose should be 1.25″ in diameter. We recommend a length of 6 feet for the pressure hose.

The second hose is the suction hose. This is the discharge hose going from the nozzle (to the GoldiBox Backpack Dredge). The suction hose should be 2″ in diameter. We recommend a length of 6-9 feet for the suction hose.

TIP: Smooth interior walled hoses work best as they provide the least internal friction. If smooth walled hoses are not an option, make sure to clean the discharge hose out over a gold pan as the internal ridges act as riffles and can hold gold.

We recommend the following hoses from Keene. They’re what we use.

1.25″ Pressure Hose (Nozzle Input) – https://www.keene.store/mm5/merchant.mvc?Screen=PROD&Product_Code=SH125

2″ Discharge Hose (Nozzle Output) – https://www.keene.store/mm5/merchant.mvc?Screen=PROD&Product_Code=SH2

Yes, but we don’t recommend it. The stock GoldiBox Dredge nozzle was designed to be used with an electric pump. A gas powered pump is much stronger than an electric pump. We have tested our nozzles extensively with many different electric pumps operating at different voltages and we stand behind their durability. A gas engine is a different beast. Over time, a gas engine will even wear out a metal nozzle (high speed abrasives) so we don’t recommend using one. While we have used our nozzles with a gas engine, we have not done any long term durability testing with one.