Re: Excessive usage of water maker membranes

Paul Dowd and Sharon Brown



Mine recently went bad after just a few months use. It turns out that there was a boat upwind of us in the anchorage leaking diesel. I’m told that any kind of fuel leak is very bad for membranes and can destroy them quickly. If you are using your water maker in a marina on a regular basis then I would think there is a possibility that it may be a  small quantity of hydrocarbons in the water on a regular basis getting into your membranes.




S/Y Ya Fohi - Amel 54 #98 - Grenada


From: <> On Behalf Of Mark Erdos
Sent: 19 April 2020 01:22
Subject: [AmelYachtOwners] Excessive usage of water maker membranes


I need a little help with water maker usage and maintenance, please.


Cream Puff has a 24v D60 water-maker. My problem is we seem to be going through membranes at the rate of a pair a year. I have read where others have used the same set of membranes for years and still get drinkable water. This is not the case with us. We are in our 5th year of full time cruising and are now on our 6th set of membranes.


When I last change membranes in Colombia, this was about March 2019. Our current membranes are just over a year old. The PPMs are starting to creep up a bit now and we have gone from the 300 range to the 500 range. We notice a change in drinking quality over 600 PPMs. This is when we usually change the membranes.


We run the water-maker at least once a week when in a marina, flush it with the fresh water rinse. I have a double charcoal filter set up for the tank rinse. When on anchor it is run just about every day. I am careful to watch the pressure and water making float gauge. I normally set it at 55 liters per hour and this put the pressure in lower side of the green range.


Any ideas why our membranes are not lasting or why our PPMs creep up?



With best regards,





Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia


Ya Fohi - Amel 54 #98

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