Pump Case Build Guide 2025
Most overlanding water gear is a black box — you can't check what it removes or fix it in the field. This guide documents a complete multi-stage system: every component, the wiring, and the test sequences to verify it works before you rely on it.
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: each build stage is explained in detail, along with a complete list of all components, where to buy them, and the engineering explanation of why it was built this way. Nothing hidden, nothing you can't verify.
What's inside
- 40 pages of technical documentation for the Pump Case 2025 Rev. B
- CAD files — the layout plan for the sheet metal panel on which the UV ballast and the power supply are neatly arranged
- Electrical wiring diagram — the complete circuit, drawn outng diagrem
- Step-by-step assembly — from components to working system
- 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 Revision B of the mobile water purification system (PC-2025-1000UV Rev. B) — the completely updated, revised, and field-tested evolution of the original Build Guide!
What has improved in Revision B?
- Separate Case Design: Electronics are now housed in a dedicated, isolated enclosure to eliminate any risk of moisture damage.
- Enhanced Connectivity: Heavy-duty wiring, robust connectors, and simplified routing for ultimate field reliability.
- Streamlined Hydraulics: The pressure reducer has been removed, creating a more efficient and less failure-prone water path.
- Unified Power Architecture: Pump and UV-C stages are now driven by a single, high-performance power supply unit.
- Rugged Portability: Optimized case layout for significantly improved handling, balance, and grab-and-go portability.
89€ incl. VAT — local taxes are included.
What happens next: after purchase you'll receive a email with a downlad link to for a ZIP archive. This includes a PDF of the build guide, the electrical wiring diagram and the CAD files for the sheet metal.
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.
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 our blog WeissExplorers.com
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 @WeissExplorers.com.