Thank you for your comments.
I put together a DIY watermaker
using a 6.5 hp gasoline powered pressure washer (3 gallons a minute flow rate) I am using 2x 40 inch Film Tec membranes. The unit works well and we flush with fresh water
I am currently in Sorong Indonesia
the salt water
here is very warm and I am concerned about organic build up in the membranes. Flow rate of fresh water
is OK but I want to make sure it stays that way. We use the unit twice a week.
I do occasionally soak the membranes with Sodium Metabisulphite.
Everything is so hard to obtain here as nobody speaks English
and I want to make sure we have everything needed on board before continuing our trip.