Water, Filtration & Sanitation

Sourcing, cleaning and closing the loop without utilities. Every link goes straight to the maker — no marketplace middlemen.

Rated for Europe: 230V single phase or 400V three phase, CE marking, and a maker you can get parts and service from without shipping across the Atlantic. The United States runs a separate list.

Size it first

Water & Rain-Catchment Calculator

Roof, rainfall and household in — annual harvest and the tank that survives a dry spell. Buy against your own numbers, not a guess.

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Alb Filter

Drinking-water filters & housings

German-made filter housings sized for a tank or a rainwater feed, on the cartridge standards sold here.

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DAB Pumps

Borehole and pressure pumps

Italian pumps in the 230V single-phase sizes a European borehole or cistern actually needs.

Visit DAB Pumps

Separett

Urine-diverting dry toilets

Swedish, and the make most often accepted by Nordic and Alpine building authorities for a permitted dwelling.

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Trelino

Compact composting toilets

Small German composting heads built for vans, cabins and tiny houses.

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The picks

The exact models the calculators name

Run the numbers first — the Water & Rain-Catchment Calculator filters these to your result. Street-price bands, checked recently, not list prices.

GRAF Platin Flachtank — 1,500–7,500L flat underground cistern, shallow dig, 30-year guarantee (1,500L shown). €850+ · View
Rain Harvesting first-flush diverter — dumps the dirty first roof-wash before the tank — the cheapest water-quality upgrade there is. €50–90 · View
Grundfos SQFlex 6 SQF-2 — 30–300VDC solar-direct submersible with dry-run and overload protection built in. €2,000+
EcoFlow DELTA Pro 3 — 230V battery source with the surge headroom this calculator sizes for. €2,800–3,500 · View
Grundfos Unilift KP 250 — the cellar-drainage standard — pair it with a battery station for outage cover. €250–350
EcoFlow DELTA 3 Plus — 1kWh with UPS-grade switchover — keeps a sump alive through the outages that matter. €700–850 · View

Other lists: Backup Power & Transfer · Solar Electrical & Monitoring · Power Stations & Expansion · Connectivity & Comms

Links go direct to the maker. Some may earn Grid CEO a commission at no cost to you; nothing here was placed for pay, and no maker saw this list before you did.