Originally Posted by monte
I just changed the WM filter and curious as to what others use and change frequency etc.
Our WM is a aqua base 65l/h dc unit and uses 24A when running. It runs to spec and production is around 200-300ppm solids.
We run it for about 3 hrs, twice a week and have been doing that for the past year. We always freshwater flush afterwards. We've changed the filter 3 times, so around every three months. We try to run it only in clear water.
We have been using a cheapish polypropylene filter bought on eBay for a few bucks each. The first filter that came with the unit was a woven type. Both types are 5 micron and the only other filtration is the seawater strainer and a carbon filter on the flush inlet side which we haven't
replaced as we don't flush with town water.
Although the old filters look a bit mangy, there's no bad smell and water produced is fresh and under 300ppm, so I'm rinsing and drying the old ones for re use if need be.
We drink the water every day and no ones died yet.
So what's others preferences for filters, woven or poly? Changing periods or reasons for changing?comments...Attachment 103403Attachment 103404
The word "cheap" always throws me a bit. There's no relation to the pre-filter and the ppm readings. The pre-filters are there to protect the system from undue wear and to protect the membrane from pre-mature fouling. A five micron pre-filter by itself won't stop anything that will kill you from getting through, that's the membranes job. I don't like anything but pleated filters in a watermaker
. String wound or spun type filters give off small bits of material that can easily find their way into the input side of the membrane and slowly block the free flow of the membrane. These filters are fine for under the sink at your house, but not for a boat based watermaker
. I would still change out the charcoal filter every six months regardless if you only use watermaker water to flush with. If the fresh water is coming from your tanks
it needs to be filtered as well. Fresh water tanks
that only see RO water are far more likely to see more growth and nasties in the tank itself. It's a good idea to every now and then to fill your tanks with good dock
water. The residual chlorine in residential water helps keep the growth down. RO water has no protective qualities. Let the charcoal filter do what it is intended to do.
How often you change the pre-filters varies all the time. It mainly depends on water condition not how many hours the watermaker runs for. If you run your system at a dock
you may need to change the filter out in a few hours of run time. Offshore
, where watermakers do best you will probably change them out once a month. Even if a water maker sits unused for two months and just fresh water flushes I would recommend changing them out every two months. The filters on any watermaker are the consumable items to a rather expensive item. Don't go cheap
and change your filters often. You can buy a lot of good quality filters for the cost of one service/repair call from your watermaker tech.
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