This collection holds three constant pressure, variable speed pumps for tank water supply, each built for a different scale of household demand.
The Davey EvoDrive ED60-09 uses an intelligent VSD (variable speed drive) to deliver constant pressure, built in stainless steel for tank water supply. It’s a single-unit pump rather than a paired system, adjusting its own speed to match water demand as it changes through the day.
The Davey DynaDrive DD90-11 steps up in scale as an all-in-one variable speed constant pressure system, also in stainless steel, and is specified for medium to large homes. It’s listed as AS/NZS 4020 compliant, which relates to materials used in contact with drinking water.
The Waimana Kaha Ultra IV is a 1.5 hp variable-speed pressure pump, also built for constant pressure from tank supply. As the Waimana Water brand's entry in this collection, it sits alongside the two Davey systems as a further option for households wanting speed-adjusting pressure control rather than a fixed-speed jet pump.
Across all three, the shared principle is a pump that varies its own speed to hold water pressure steady, rather than switching on and off at fixed points. The right choice between them comes down to household size and demand, with the DynaDrive positioned for larger homes and the EvoDrive and Kaha Ultra IV suited to smaller to medium household setups.
FAQs
What does “variable speed” mean on these pumps?
Each pump adjusts its own running speed to match water demand, rather than switching on and off at a fixed speed like a standard jet pump.
What’s the difference between the Davey EvoDrive and DynaDrive?
The EvoDrive ED60-09 is a single-unit intelligent VSD pump for tank water supply. The DynaDrive DD90-11 is an all-in-one system specified for medium to large homes.
What does AS/NZS 4020 compliance mean for the DynaDrive?
It relates to the standard for materials that come into contact with drinking water, which the DynaDrive DD90-11 is listed as meeting.
Are all three pumps suitable for tank water supply?
Yes, the EvoDrive, DynaDrive and Waimana Kaha Ultra IV are all listed for tank water supply.
What horsepower is the Waimana Kaha Ultra IV?
It’s listed as a 1.5hp pump.
Are these pumps made from stainless steel?
The Davey EvoDrive and DynaDrive are both listed in stainless steel construction.
How do I decide between the DynaDrive and the smaller options?
Household size is the main factor here. The DynaDrive DD90-11 is specified for medium to large homes, while the EvoDrive ED60-09 and Waimana Kaha Ultra IV suit smaller to medium household demand.
