CROFTECH Marine and Motor

CROFTECH Marine and Motor states it is a Rainman Watermaker dealer and supplies and installs Australian-made Rainman systems along with spare parts and consumables.

Watermaker Products And Services

The relevant systems or brands are Rainman watermakers. The business advertises or is verified for Rainman supply; installation; spare parts; consumables; marine maintenance; customisation. Its principal location for this directory is Gold Coast / Coomera QLD, with practical coverage described as Gold Coast and South East Queensland.

What Sailors Should Know

A marine watermaker is a reverse-osmosis desalination plant, not simply a filter. It draws seawater through an intake and pre-filter system, raises the pressure sufficiently for the RO membrane to separate fresh product water from concentrated brine, then sends the usable water toward a test point or tank. Production depends on seawater temperature, salinity, membrane condition, feed pressure and system design, so advertised litres per hour should be treated as a rated figure rather than a guaranteed output in every anchorage.

For an installer or service specialist, diagnosis and installation quality matter as much as the watermaker brand. A seawater RO system combines intake plumbing, pre-filtration, a lift pump, a high-pressure pump, membrane vessels, product-water plumbing, brine discharge and electrical control. Poor intake placement, air leaks, undersized wiring, restricted filters or inaccessible components can make a good watermaker unreliable.

Sizing A Watermaker For A Cruising Boat

Output should be chosen from the crew's real daily water use rather than from boat length alone. Drinking and cooking may require relatively little water, while regular showers, washing machines, deck rinsing and liveaboard use can multiply consumption. A higher-output unit can shorten run time but may demand more AC or DC power. A low-energy DC system can suit a solar-heavy yacht but may need to run for many hours to fill the tanks. Owners should compare litres per hour, watts consumed, daily energy required and the capacity of the boat's battery, alternator, solar, inverter or generator system.

Installation space is equally important. Modular systems allow the membranes, filters and pumps to be separated around a machinery space, while framed systems can be easier to install and service when enough room exists. The intake should be located where it is unlikely to draw air or contaminated harbour water. The brine discharge needs a reliable route overboard. Filters, pressure gauges, flushing valves and membrane housings should remain reachable for routine maintenance rather than being buried behind permanent joinery.

Maintenance And Long-Term Use

Watermakers reward regular use and correct shutdown procedures. Seawater left stagnant inside a membrane system can create biological fouling, so freshwater flushing is important when the unit will sit unused. Longer lay-ups may require preservation or pickling using the manufacturer's specified process. Prefilters need routine replacement and should be checked more often in silty, plankton-rich or polluted water. Product-water quality should be monitored before water is diverted into the main tank, particularly after servicing or a long period of storage.

Owners planning remote cruising should ask which spares are sensible to carry. Typical items may include sediment filters, pump service parts, O-rings, belts or impellers, hoses and preservation chemicals, but the correct kit depends on the specific system. Membranes often last a long time when operated and maintained correctly, so replacing them simply because of age is not always necessary. Diagnosis should consider feed flow, pressure, temperature and water quality before assuming the membrane has failed.