Gold Rat Metal Detectors is located 6/50 Freda Street Upper Mount Gravatt. This is the only store to stock Metal Detectors. Gold Rat Engineering is located 4/16 Redcliffe Gardens Drive Clontarf This is where you will see the largest range of your highbankers, sluices and accessories

*we also offer an alternative pump not listed online please email for details

Gold Rat Engineering stock proline mining equipment.

Proline offers one of the most comprehensive line of pumps in the small dredge industry. These are high performance centrifugal pumps designed specifically for operating dredges.

The HP400 is a 3” x 2” pump with a large five vane aggressive bite impeller. The impeller diameter, or ”trim”, is 5.25” (133mm).

It was designed for 200+ cc engines with a 5/8”-18 externally threaded crankshaft. It’s capable of producing up to 380 GPM in a free-flow condition, with no load (back-pressure) placed upon it. Typically, the pump’s working pressure in a gold dredging/highbanking environment will be in the 35 to 45 PSI range, but it can sustain 55+ PSI without any difficulty or seal issues. It is used primarily for gold dredges but has uses in many other applications such as aquaculture and removing weeds from lakes and ponds.