Davey Dynajet XJ self-priming jet pump series
High-capacity water booster available in XJ50, XJ70 & XJ90 models
- Robust priming performance: surface-mounted pumps that draw water from tanks, shallow wells and bores with suction lift up to 8 m.
- Quiet operation: engineered for smooth performance with minimal vibration and noise.
- Automatic pressure system: integrated pressure switch and pressure tank deliver consistent water pressure with automatic start/stop.
- Energy-efficient motor with thermal overload protection: saves power and also helps prevent overheating and dry running.
- Versatile applications: ideal for tank water supply, rainwater harvesting, spearpoint (wellpoint) and shallow-well pumping. But also great for garden irrigation and mains water boosting.
The Davey Dynajet XJ self-priming jet pump series delivers reliable water pressure. As a result, it suits NZ homes on rainwater tanks, shallow wells, or mains. In addition, performance is strong across the range. For small households, choose XJ50. For medium homes with several outlets, step up to XJ70. Finally, for larger properties or higher use, go with XJ90.
Upgrade your water supply with Davey Dynajet – built tough for Kiwi homes.
Advanced domestic water booster pump technology for reliable water pressure
The Davey Dynajet XJ series uses a self-priming jet pump with an integrated pressure switch and tank for automatic operation. The pump starts and stops automatically when you open or close a tap, maintaining steady pressure. Self-priming capability lifts water from depths up to 8 m. Therefore, this pump is suitable for tank water, spearpoint (wellpoint), shallow-well applications, and bores.
Davey Dynajet self-priming pump: performance tailored for every need
Each model is sized for the right flow and pressure. XJ50 (0.75 kW) delivers up to 50 L/min for smaller households or baches (1–2 bathrooms). XJ70 (1.1 kW) steps up to 70 L/min and higher pressure for medium homes (2–3 bathrooms) and multiple outlets running simultaneously. XJ90 (1.5 kW) delivers up to 90 L/min with strong pressure for large homes, lifestyle blocks, small commercial setups, irrigation, or high-demand water use. Choosing the right model ensures mains-like water pressure matched to your property.
Surface-mounted water pump: built tough for New Zealand conditions
The Dynajet XJ series is built to last. A durable cast-iron pump body provides strength and longevity, while corrosion-resistant components handle New Zealand’s harsh climates. Engineered plastic impellers and carbon/ceramic mechanical seals deliver quiet, dependable performance year after year.
AS/NZS 4020 drinking water certification – why it matters
Davey Dynajet XJ water pressure systems are certified and tested to AS/NZS 4020 for products in contact with drinking water. They will not affect the taste, smell, or appearance of water, will not support the growth of harmful micro-organisms. Moreover this certification ensures the pump will not leach metals or mutagenic/cytotoxic compounds into your supply.
Flexible options: Davey Dynajet XJ with Torrium² & 40P tank
The Dynajet XJ can be customised to your setup. Add the Torrium² controller for constant, mains-like pressure, or pair the pump with the larger Davey 40P pressure tank to reduce cycling, improve efficiency, and extend motor life. Choose the standard XJ, the XJT (XJ + Torrium²), or XJ + 40P based on flow demand, number of outlets, and application.
Davey Dynajet XJ self-priming jet pump series: backed by Davey and Aqua Works expertise
With over 80 years of pump engineering experience, Davey is a trusted name in water supply across New Zealand and Australia. The Dynajet XJ series carries this heritage of quality, backed by reliable after-sales support and proven performance. Aqua Works provides local knowledge and hands-on expertise to help you choose, install, and maintain the right pump for your home or business.
Get the right water pressure system for your home today – call the experts at Aqua Works on 0800 278 288.
Additional information
| Weight | N/A |
|---|---|
| Flow rate | 50 L/ min, 70 L/min, 90 L/min |
FAQ
Common Davey Dynajet XJ series pump problems and solutions
Why has my Davey Dynajet XJ pump lost prime and stopped pumping water?
Air has likely entered the suction line (leaking foot valve, joints not airtight) or the source ran dry. Re-prime the pump (fill the casing), check/replace the foot valve, and ensure all suction fittings are airtight.
Why does my pump keep starting and stopping frequently (short-cycling)?
Often a waterlogged or faulty pressure tank, system leaks, or incorrect pressure-switch settings. Service the pressure tank, fix leaks, and set cut-in/cut-out correctly to prevent motor wear.
My pump keeps overheating and shutting down – what’s wrong?
The motor’s thermal overload is tripping. Common causes: running dry, poor ventilation, or excessive cycling. Restore water supply/prime, improve airflow around the motor, and verify the pump is correctly sized for demand.
Why is my Davey Dynajet XJ pump noisy or vibrating?
Excess noise/vibration can indicate cavitation (air on the suction side), worn bearings, or unstable mounting. Bolt the pump to a firm base and ensure the suction line is airtight and correctly sized.
Why is my Davey XJ pump giving low water pressure or weak flow?
Possible clogged impellers, blocked filters/pipework, undersized suction lines, or the pump is undersized for the property. Large homes typically need XJ70 or XJ90 rather than XJ50.
My pump is leaking water around the motor shaft – what causes this?
A worn mechanical seal (carbon/ceramic) between the motor and pump body. Replace the seal promptly to prevent motor damage.
