Pump Case Build Guide
The complete build plan for the Pump Case — from bare Zarges box to a working filtration system. Bill of materials, dimensions, sourcing, and the mistakes we already made.
Why this exists
Most water filtration gear for overlanding is a black box. You buy it, you trust it, and you have no way to check what it actually removes — or to fix it when it fails somewhere far from a workshop.
This guide is the opposite. It documents a multi-stage system in full: what each stage removes, why it's sized the way it is, and how to build, test, and maintain it yourself. Nothing hidden, nothing you can't verify.
What's inside
- 37 pages of technical documentation
- Step-by-step assembly — from components to working system
- Electrical wiring diagram — the complete circuit, drawn out
- Check and test sequences — how to verify the system actually works before you rely on it
- Component list with sources — exactly what to buy and where
Get the guide
This guide documents the 2025 version of the Pump Case (PC-2025-1000UV) — the system as we designed, built, and field-tested it. Development continues; a 2026 version with an updated architecture is in progress. That's why the current guide is offered at an entry price!
Buy it now and you'll be on the list when the 2026 version arrives.
€59 incl. VAT — local taxes are included.
What happens next: after purchase you'll receive the PDF by email.
Payment is processed by Paddle.com as Merchant of Record. Paddle is the seller of record for this transaction; their terms and refund policy apply.
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Who wrote it
I'm Sebastian — mechanical engineer (Dr.-Ing.), and I built this system because I couldn't buy one that told me honestly what it removed. It's been designed, built, and field-tested on our own vehicle, not specified from a catalogue.
The reasoning behind every stage is documented in the guide, and discussed in depth on this blog.
Sebastian Weiß
What this is — and what it isn't
This is documentation. It is not a kit, and no parts are shipped.
The guide describes the system we built and tested. It does not constitute a warranty of microbiological or chemical drinking water safety in any individual application. Anyone building, modifying, or operating a water treatment system does so on their own responsibility, and is required to verify the suitability of their setup for their own water source and intended use.
Not sure yet?
Start with the free blueprint — it shows the system architecture at a glance, no purchase needed. Just sign up for our newsletter!