Skip to content

LEHMANN HP1 review

A pressure vessel set rather than a plain pump: 19-litre steel tank, pressure gauge, and it starts and stops itself.

The bottom line A booster set, not a garden pump: a 19-litre steel pressure vessel, a gauge and a switch, so the machine starts and stops on demand instead of running while it is plugged in. 800 W, 5 200 l/h, 43 m head, 4.3 bar, 8 m suction, pre-assembled on a steel base with fixing holes.

This is a booster set

The German term on this shelf is Hauswasserwerk, and four of the nine machines here are one. It is a different article from a garden pump and it is worth saying before anything else.

A garden pump runs whenever it is switched on. You connect it, start it, water, and stop it.

A booster set is a pump plus a pressure vessel plus a pressure switch. It fills the vessel, stops, and restarts when the pressure drops because somebody opened a tap. It is wired in and left, and it supplies an outside tap, an irrigation line or a toilet cistern as if it were mains.

Comparing the two on price alone compares a tool with an installation.

What the maker prints on its own page

A self-priming booster set with an 800 W motor, output up to 5 000 l/h, suction height up to 8 m and maximum 4.3 bar, stated as ideal for garden watering, household water supply and rainwater use. An on/off switch for simple control and an integrated pressure gauge for checking the water pressure. Overheating and overload protection, plus protection against water escaping at the motor. A 19-litre coated steel pressure vessel and a clearly readable gauge for stable pressure conditions. Completely pre-assembled with a reinforced connection cable, an earthed plug and a stable steel base with fixing holes, ready for use without further assembly.

The title states 5 200 l/h and 43 m of head.

The contradiction

5 200 l/h in the title, up to 5 000 l/h in the first feature line.

This page prints both. Picking one would be tidying a manufacturer’s own inconsistency out of sight, and a reader is entitled to know it is there.

The base with fixing holes

Unglamorous and correct. A booster set cycles on and off, and each start is a jolt. One that is not bolted down walks across a shed floor over a season and strains its own connections.

What is missing

The connection thread — on a machine meant to be plumbed in, which is the one listing where it matters most.

And no weight, on an object with a 19-litre steel vessel on a steel base.

Availability

Around 120 €, read at the German, French and Italian Amazon stores on the day of the survey.

Listed and unsold: the American, British and Spanish Amazon catalogues hold the reference with nobody behind it.

Taken from Keepa on the day this page was last revised; stock and prices move without notice.

Prices quoted in this text were read on 26 September 2026. The live price is at the top of the page.

The declared figures, and the point they stop at

Strengths

  • A pressure vessel and a gauge, so the system holds pressure rather than running continuously
  • Fully pre-assembled with a reinforced cable and an earthed plug, stated
  • A steel base with fixing holes, so it can be bolted down rather than walking across the floor

Compromises

  • The flow is stated as 5 200 l/h in the title and 5 000 l/h in the features
  • No connection thread published
  • A vessel set is an installation rather than a portable tool, and the listing does not say so

Specifications

Flow rateUp to 5 200 l/h in the title, up to 5 000 l/h in the features — at zero head
HeadUp to 43 m, at zero flow — equivalently up to 4.3 bar
Motor power800 W, self-priming, with overheating and overload protection
Suction heightUp to 8 m, as stated
ConnectionsNot published
Material19 L coated steel pressure vessel on a steel base with fixing holes
WeightNot published
Amazon referenceB0GJD6H39C (one reference across 6 Amazon marketplaces)
EAN5905388900247

What this machine usually gets asked

What is the difference from a garden pump?

A garden pump runs while it is switched on. A booster set holds pressure in a vessel and starts the pump only when the pressure drops — when a tap is opened. One is a tool you get out; the other is an installation that stays connected.

What does the 19-litre vessel do?

It stores pressurised water so short draws are served from the tank without the motor starting. That reduces the number of start cycles, which is the main thing that wears a booster set out.

Which flow figure is right?

The listing gives 5 200 l/h in the title and up to 5 000 l/h in the feature text. This page prints both and does not choose — a site that picked one would be repeating a number rather than reporting it.

Who this one is for

Supplying an outside tap or an irrigation system from a cistern, where the pump should run on demand

Guides that feature it

Price and availability

A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.

Details checked on September 26, 2026.

Sources

Specifications: manufacturer sheet and Amazon product page. Prices and availability: Keepa. No product on this site has been physically tested.

How we assess products