Watermaker parts in Dubai include reverse-osmosis membranes, pre-filters, high-pressure pump service kits, valves, pressure gauges and preservation chemicals for Schenker, Sea Recovery, Spectra, HRO and Idromar systems. Gulf water is unusually saline and warm, which shortens membrane life and makes correct pickling before layup essential.
Shorter than the manufacturer's temperate-water figures. High salinity and warm water make the membrane work harder, and poor pre-filtration or missed pickling shortens life further. Many UAE yachts see three to five years with disciplined maintenance, far less without.
Whenever pressure drop rises or output falls, and as a routine at least every 20–40 running hours in coastal water. Pre-filters are the cheapest component in the system and the single best protection for the membrane.
Yes, for any layup longer than about a week. Preservation chemical prevents biological growth in the membrane. An unpickled membrane sitting through a UAE summer is usually a write-off.
You should not. Harbour and marina water contains fuel, oil and high organic load that fouls membranes rapidly. Run it in clean water offshore, and flush with fresh water when returning to the berth.
Common causes in order: clogged pre-filters, air in the feed line, a failing boost pump, low feed pressure, and finally a fouled or aged membrane. Check the cheap items first — membranes are frequently replaced when the real fault was upstream.
Filters, chemicals and common membranes are usually available locally. Pump service kits and control boards for less common brands are often ordered in, so keeping a spare set of pre-filters and a membrane aboard is normal practice for cruising yachts.