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Watermaker Spare Parts Replacement Schedule

Filters, membranes, pump oil and consumables — when to replace

Watermaker spare part replacement is not a fixed calendar alone: the same interval is shorter on a busy charter gulet and longer on a lightly used weekend cruiser. Table values are general guidance; operating hours, water quality and filter condition are confirmed during service or a survey visit.

For the full maintenance flow see the Watermaker Maintenance Guide; for the parts list see the Watermaker Spare Parts catalogue. Seacraft FAQ lists winterisation, 250-hour pump oil and pre-season prep as separate periodic items.

Quick Reference
  • Pre-filter: 50–200 hours / 3–6 months
  • Carbon: 6–12 months
  • Membrane: 3–7 years
  • HP oil: 250 hours change
  • Lay-up chemical: 4+ weeks idle

Replacement Schedule Table

Part / consumable Suggested interval Replace when Source
5–20 µm pre-filter (sediment) 50–200 hours or 3–6 months Rising pressure, flow drop, visible fouling Schedule table, maintenance guide
Dolomite filter Assessed with pre-filter Fouling, odour, flow loss Spare parts catalogue
Carbon filter 6–12 months Calendar + usage intensity Schedule table
Membrane (TORAY / FILMTEC) 3–7 years (usage dependent) Persistent high TDS, flow loss FAQ, schedule table
HP pump oil 250 hours — change; level check at season opening Digital hour display; leak / vibration FAQ
Lay-up chemical Idle 4+ weeks; season end Lay-up / winterisation plan FAQ, end-of-season checklist

Membrane life depends on flush discipline, pre-filter condition, salinity and running hours — seawater salinity effect, flush guide.

Catalogue Parts — Schedule Notes

Cards below match components listed in our spare parts catalogue. Mechanical parts (pumps, motors) are not on a routine calendar — they are replaced on fault or service finding.

Sediment & dolomite filters

Most frequently replaced consumables. Dirty pre-filters load the membrane early — always renew at season opening — pre-season checklist.

Membrane / housing

Seacraft units use TORAY and FILMTEC membranes — FAQ. Replacement is measured in years; early loss is usually linked to maintenance discipline.

Pump oil

Change at 250 hours — digital display. SCW-50 PRO also shows run hours on the panel. Application during service.

Lay-up chemical

At season end or 4+ weeks idle. Bodrum/Göcek annual packages combine filter work and lay-up on-site.

High / low pressure pump

No routine replacement beyond oil. Inspect on visible leak, failure to reach pressure or unusual vibration — high-pressure pump.

AC / DC motor, remote panel

Long-life components; model-matched parts from stock on failure. Correct part number confirmed at survey.

Pre-Filter Interval by Usage Profile

The pre-filter table gives both hours and months — whichever limit comes first. The framework below is for planning; exact intervals are confirmed in service.

Profile Typical running Pre-filter guidance
Charter / gulet — heavy Several hours daily, high flow Check toward 50–100 hour band
Blue cruise sailboat — medium 2–4 hours daily at anchor 100–200 hours or 3–6 months
Weekend use — light Low hours per season 3–6 month calendar; renew at season opening
Commercial / fishing — continuous Long daily runs Frequent filters; annual membrane check — location service

Signs That Need Early Replacement

Membrane suspicion

  • TDS still high after flush and new filters
  • Flow stays well below nominal
  • Repeated brine rejection fault — common mistakes

Early membrane loss causes (on-site sources)

  • Missed flush
  • Running with dirty pre-filters
  • Brine reject valve / line fault

Annual filter service and membrane checks are recommended on-site at marinas — Marmaris and other locations.

Seacraft Spare Parts Advantage

Local manufacturing

Lead time is usually within the same week, not weeks of waiting.

Broad catalogue

Filters, membranes, pump oil, lay-up chemical, motors and pump components in stock.

On-site service

Parts fitted on your yacht — no need to move the boat elsewhere.

Recommended Onboard Spares for the Season

Our first-time user guide lists not carrying spare filters as a common mistake. On long anchorage or charter seasons, plan at least this minimum set:

  • At least one pre-filter set (sediment / dolomite — matched to your model)
  • Carbon filter (per annual change calendar)
  • Pump oil — service plan as 250 hours approaches
  • Use survey or existing filter labels to confirm correct part numbers

Frequently Asked Questions

For pre-filters the table gives both — whichever comes first. For pump oil, FAQ 250 hours is the rule, tracked on the digital display. Lay-up chemical follows idle duration (4+ weeks), not a fixed calendar month.

Check flush discipline, pre-filters and the brine line first. Our site lists missed flush, dirty filters and reject faults as early loss causes. If the issue persists, membrane replacement and root-cause review are done in service — maintenance guide, flush guide.

Local manufacturing means parts are usually available within the same week. For mid-season urgency, the correct part list is confirmed via survey or service record — appointment form.

Level check at season opening — pre-season checklist. Change is mandatory at 250 operating hours per FAQ; done in service with oil from the catalogue.

Pre-filter changes can be done by the owner. Membrane work, pump oil changes and HP pump intervention are best with service support. Annual filter and membrane checks are offered on-site at marinas; scope is confirmed at booking.

Related Guides

Watermaker Maintenance Guide · Membrane Flush & Winterization · Pre-Season Checklist · End-of-Season Checklist · All Guides

Confirm Your Spare Parts Plan at a Survey

Model, run hours and season profile reviewed together

Book an Appointment Call: +90 252 412 90 78