Before you start
Gather the appropriate supplies and review the specific equipment manual.
- Watermaker manual
- Operating pressure log
- Filter replacement records
Step-by-step instructions
Record true production
Measure product-water volume over a fixed time using the maker-approved test method.
Compare pressures and temperatures
Note seawater temperature, feed pressure, operating pressure and salinity indicators against normal data.
Check feed restrictions
With the system shut down per the manual, examine filter status, intake conditions and supply pump clues.
Review membrane care
Incorrect preservation, fouling or chemical exposure can affect production and require specialist service.
Get the fault isolated
Have a trained operator evaluate pump, regulator, membrane and flow instrumentation before making high-pressure adjustments.
Safety note
Watermaker high-pressure lines can cause serious injury. Never loosen a pressurized fitting or push operating pressure beyond the maker limit.
Key takeaway
Production rate is affected by conditions; pressure alone cannot identify the failed part.
Keep this job on your maintenance schedule
Save the topic as a maintenance task, choose a due date or engine-hour target, and record future service. Free and stored on your device.
Add to my maintenance plannerThis guide is for general education. Follow your equipment manufacturer’s instructions, current navigation guidance and applicable marine safety standards. When uncertain, use a qualified marine professional.