Watermaker Maintenance Guide
Daily use, periodic service and seasonal prep — Seacraft SCW series
A watermaker purifies seawater by reverse osmosis; without regular care, membrane output drops, salt builds up and mid-season failures become more likely. Our FAQ states that watermakers need periodic maintenance: filter cleaning and replacement, flush cycles, pump oil and winterisation when required.
This guide is compiled from product pages, the spare parts catalogue and location service information on this site. For flush and lay-up steps see Membrane Flush & Winterization; for part intervals see Spare Parts Replacement Schedule.
Seacraft Periodic Care (FAQ)
- Winterisation if unused more than 4 weeks
- HP pump oil every 250 operating hours
- Pre-season preparation checks
Maintenance Schedule — When to Do What
The table below is a general framework based on usage intensity. Operating hours, water quality and filter condition are confirmed during a survey or service visit.
| Interval | Task | Notes |
|---|---|---|
| After each production run | Freshwater flush (reverse flush) | Automatic or manual; reduces salt build-up in the membrane path |
| Regular use / weekly | Pre-filter check, short flush | Dirty filters load the membrane prematurely |
| 50–200 hours or 3–6 months | 5–20 µm pre-filter replacement | Spare parts table |
| 6–12 months | Carbon filter replacement | Spare parts table |
| 250 operating hours | High-pressure pump oil change | Tracked on digital display — FAQ |
| Annual | Filter service + membrane check | Recommended on-site at marina locations |
| Idle more than 4 weeks | Winterisation (preservative / lay-up chemical) | Prevents bacterial growth inside membranes — FAQ |
| Season opening | Pre-season preparation checks | Pre-season checklist |
| Season closing | Flush, drain, winterise | End-of-season checklist |
| 3–7 years (usage dependent) | Membrane replacement | TORAY / FILMTEC — FAQ, spare parts guide |
Membrane life depends on flush discipline, pre-filter condition, salinity and running hours. For early performance loss see our seawater temperature & salinity guide.
Component-by-Component Care
Pre-filters
Sediment and dolomite filters trap particles before the membrane. Clogging raises pressure and reduces flow.
Listed in our spare parts catalogue. Replacement interval varies with use.
Membrane & flush
Seacraft units use TORAY and FILMTEC membranes. Freshwater flushing after production prevents salt accumulation.
SCW-30 has automatic reverse flush; many 230V models offer schedulable auto flush. Details: flush guide.
High-pressure pump
The heart of the system. Pump oil must be changed every 250 hours of use.
Visible leakage, failure to reach working pressure or unusual vibration requires inspection — high-pressure pump page.
Brine discharge line
Concentrated brine must discharge freely. Blockages raise pressure and cut output.
SCW-50 PRO includes automatic brine rejection. Brine faults can shorten membrane life — spare parts guide.
Monitoring & alarms
SCW series units offer digital displays with pressure, flow, water quality and hour tracking. Low-pressure protection shuts down if pressure is not reached within 30 seconds; high pressure above 65 bar triggers protection.
Investigate the cause before restarting after an alarm.
Winterisation
If the unit will be unused for more than 4 weeks, winterisation prevents bacterial growth inside the membranes.
Lay-up chemical is listed in the spare parts catalogue. Steps: end-of-season checklist.
In-Season Usage Tips
Flush discipline
Skipping post-production flush stresses the membrane. The same applies to 12V systems running on solar at anchor — 12V + solar panel guide. If auto flush is enabled, tune the duration to your production profile; if disabled, plan manual flushing after each run.
Run time and membrane load
Long continuous daily runs load both power and membrane. Plan a sensible operating window from your daily litre requirement — capacity guide.
Water quality monitoring
SCW-50 PRO tracks water quality on the touch panel; SCW-30 has a product-water test outlet on the remote panel. On performance loss, check pre-filters and flush first, then assess the membrane.
Modular systems
On SCW-50 PRO Modular and larger units, periodic maintenance can be carried out without shutting down the entire system — as noted on shipyard and commercial vessel location pages for operational continuity.
On-Site Service & Annual Maintenance Package
Seacraft offers on-site surveys and service at marinas along the Turkish coast. Location FAQs for Marmaris, Didim, Foça and others recommend annual filter service and membrane checks — all carried out on your yacht.
Spare parts supply
Local manufacturing means spare parts are usually available within the same week — watermaker spare parts catalogue. Pump oil, filters, lay-up chemical and motor components are stocked.
Service scope depends on model, operating hours and current filter condition — confirmed during a survey or service visit. Use the appointment form to book.
When to Call for Service
| Symptom | Likely cause | First step |
|---|---|---|
| Noticeable flow drop | Dirty pre-filter, tired membrane | Filter check; replace if needed |
| Low-pressure alarm | Air leak on intake, blocked filter, low feed pressure | Check filter and intake line |
| High-pressure alarm (above 65 bar) | Blocked brine line, valve issue | Inspect brine and pressure lines |
| Pump oil leak / vibration | Seal wear or pump damage | Service — HP pump inspection |
| Brine rejection fault | Missed flush, rejection valve | Common mistakes guide |
Frequently Asked Questions
Plan Your Maintenance at a Survey
Filter condition, run hours and season calendar reviewed together
Book an Appointment Call: +90 252 412 90 78