Jet Pumps

There are a few factors to consider when choosing a water pump for rainwater harvesting:

• The type of pump (submersible or jet pump)
• Required flow rate
• Required head
• Required pressure. Pressure for water can be calculated using P(kPa)=9.81xhead(m)

Contact your local plumber to size up correctly for each individual application.

Jet pumps, also known as "pressure pumps" are water pumps that contains and drives an impeller/centrifugal pump. The impeller moves water, through the Jet Pump and increases the pressure of the water, to assist in areas where high suction lift is required (e.g. double storey homes)

For water tanks including rainwater harvesting systems, Bromic Waterboy™ jet pumps can be installed below or above the tank.

Installing a water pump below the tank aids the water flow and hence has minimal installation requirements. If a Bromic Waterboy™ jet pump is installed above the tank, it should have a foot valve (not supplied by Bromic) installed at the bottom of the pipe in the rainwater tank. This is to prevent water from flowing back down to the tank.

Bromic Waterboy™ jet pumps can be used for various applications.

This includes:

• Residential wells
• Aquariums
• Garden irrigation
• Domestic and commercial properties
• Water tanks
• Draining sump or well
• Lifting or elevating liquids
• Aeration or agitation
• Boosting suction pressure to a centrifugal pump

Shouldn’t use this pump if its in a place where water freezes. Water will expand when it freezes inside the pump and will cause the pump to crack. The water should be fully drained from the pump and pipes during these periods. 

No, they are not required to have watermark approval. They have AS4020 approval for drinking water.

Unscrew the metal bolt at the back near the bottom of the metal part of the pump to drain water out. Can also tip the pump without breaking connections to drain more.

Check on the flow vs head chart. If you decrease the flow the pressure will increase. More pressure can also be achieved with less bends and height in the piping. Pressure=head*9.81*specific density

There are instructions in the instruction manual which include pictures of where the metal bolt at the top of the metal part of the pump next to the outlet hose, unscrew and fill up with water with a jug.

Either there is no controller connected or it is not plugged in correctly. Read instruction manual to see how to connect the controller.

It will work when it is primed with water and the power is plugged in.

We have a 3kW pressure controller (7575372) which controls the pump supply for the rainwater. We have a hydro switch (7575029) which can be added to this controller to allow the mains water to be connected so water can be supplied even if there is no tank water. 

Contact a plumber to calculate the required flow rate and pressure for the installation (which depends on, the length, height, and diameter of pipes and how many taps it will serve) and from there we can advise which pump will suit. 

The jet pumps do produce some noise when in operation, although if the noise sounds odd or uneven, there may be a problem. The impeller could be damaged (due to the pump running dry, or something stuck), or bubbles could be present (cavitation) which causes noise and also damage. Prime and purge pump with water so there are no bubbles present.