Yes, it-s true,
Kärcher says the smallest Model of it-s range, the K 2.14 or similar, which i actually use, is for occassional small jobs only.
I guess that is exactly what i am doing, every 3 or 4 days i have it running for an hour up to 90 minutes. No problems so far, ventilation is an issue...
The plungers are made of stainless steel
, but not a 100% saltwater resistent grade, so flushing
the system after use is essential, what means 15 Liters (or 15 minutes) of initial production go down the drain after each run.
Life expectation of the Kärcher pump will be one to two years, depending on hours of use, so its prudent to have a spare Kärcher on board,
but for 60 Euros, i may use up 20 Kärchers in 40 years before catching up with the costs of a CAT or Wanner pump. Don-t think i will still be sailing in the age of 100....
The output of the Kärcher is at the minimum side of the parameters given by filmtec, at 1.3 gallon (4 to 5 Liters) per minute at operating pressure, that is why i don-t expect my membrane to last as long as in configurations producing higher feed flow.
Future will tell, but membranes are getting cheaper as well,...
I plan to install a second membrane to increase output to 100 L/h.
Will let you know how this worked out..
For the ones who can read german,
this is my watermaker-site
Pics below show test run in my backyard