The Dual Max VSD fills this gap, says Jabsco, by marrying two pumps together - the Sensor Max VSD and the PARMax 4 - to produce an output flow of up to 34 litres per minute.

The Sensor Max VSD is used as the controlling pump. It has a variable speed drive controlled by an electronic microprocessor sensor, enabling, they say, output to be matched to demand.

The pump responds to changing demand so flow varies between the two pumps, ensuring the right flow to multiple outlets, such as showers, galley taps or deck washers, as they are switched on or off.

They say the unit also eliminates irregular flows, pipe hammer and temperature fluctuations without the need for an accumulator tank.

The same unit can be installed on a 12 or 24 volt DC system - the pump automatically adjusts to its supply voltage and will operate at all levels between 10 and 29 volts.

It is also very energy efficient, having a draw of less than an amp when in low demand mode and at normal usage levels, it is virtually silent running.

Jabsco T: 01992 450145 Fax: 01992 467132 E: jabsco.marine@fluids.ittind.se W: jabsco.com