Watermaker Lessons After 1.5 Years on a Sailboat

Watermaker Lessons After 1.5 Years on a Sailboat

This episode is probably only interesting if you enjoy the technical side of living on a boat.

Because yes — sailing is sunsets and anchor beers. But it’s also filters, seals, voltage drops, and the quiet realization that “unlimited water” is mostly a power-management problem.

Our DIY Octopus Watermaker Setup With a Kärcher Pump

Before we started our journey south, we installed an Octopus Watermaker in the south of France — a DIY setup that runs on a standard Kärcher pressure washer.

And if you’re expecting a neat success story… well.

We did a couple of things wrong.

We definitely misused the Kärcher. We destroyed a few of them. And we made water in bays that were so muddy that, in hindsight, we should have just waited for a better anchorage instead of proudly producing “fresh water” that looked like it had already lived a full life.

And yet: the watermaker is still going strong.

What We Learned the Hard Way

Over the last 1.5 years we’ve learned a lot — mostly by trial, error, and the occasional moment of staring at the system thinking, “Why is it doing this now?”

So in this video we try to sum up the biggest lessons we’ve learned: what matters in the installation, what matters in daily use, what we’d do differently, and what actually makes the difference between a watermaker you use all the time and one that becomes an expensive piece of equipment you avoid touching.

We talk about placement, performance, pump choices, energy use, and how running a watermaker changes the way you sail — because once you’re not constantly worried about running out of water, you start making different decisions about where to stop, how long to stay, and how remote you’re willing to go.

A Quick Update Since Filming

One little update since filming: I completely opened up our K4 Compact and unfortunately destroyed it while reassembling. Not my proudest moment — but it was a great learning experience, and it actually confirmed something important: Kärcher sells spare parts for basically everything.

If I had to give one practical tip after all this: buy one of these units, remove the entire housing, and service the oil and bearings every six months. Do that, treat it reasonably well, and you’ll probably get a long life out of it.

Watch the Episode

If you’re thinking about installing a watermaker, or you’re already running an Octopus/Kärcher setup and wondering what to improve, this episode will save you time — and maybe one or two unnecessary mistakes.

We’re Nike and Floh, and we live full-time on our 35-foot sailboat. If you’re into sailing, refitting, off-grid living, or life on the move — welcome aboard.

Stay curious, stay salty.

– Floh