Garden pumps
Head or suction: which 1 200 W pump suits my well?
Same motor power, same maximum flow, both with stainless pump housings. The two figures that separate them are the two that decide whether a pump works at all in a given garden: how high it can push water, and how far below the pump the water sits.
| Compared on | HWW12050-IN | 31372 Jetpumpe |
|---|---|---|
| Motor power | 1 200 W | 1 200 W |
| Flow rate | Up to 5 000 l/h at zero head | Maximum 5 000 l/h at zero head |
| Head | Maximum 50 m at zero flow | Maximum 45 m — equivalently 4.5 bar |
| Suction height | Up to 8 m | Maximum 9 m |
| Pressure vessel | 19 L stainless | Not published |
| Hydraulic material | Stainless housing | Stainless housing, Noryl hydraulic unit |
| Connections | Not published | Not published |
A tick means one listing published something the other did not, or published a better figure. It does not mean the product is better, and the column is not a score out of anything: a maker who says less loses lines here without losing a comparison. The two verdicts below are where the page is settled.
Hyundai publishes the higher head — 50 m against 45 — and a 19 litre stainless pressure vessel. The vessel is the part that decides how a booster pump behaves day to day: a larger one means the motor starts less often for a given draw, and a stainless one does not rust from the inside the way a painted steel tank does.
T.I.P. publishes the deeper suction at 9 m, and that is the figure that decides whether a pump can be used at all. Head is a matter of how far the water goes once it is moving; suction height is a hard physical limit set by atmospheric pressure, and a well one metre too deep is a pump that never primes. It also states its head in bar as well as metres, which is the unit a sprinkler is specified in.
Because a pump does not pull water up — atmospheric pressure pushes it up into the space the pump evacuates, and the theoretical ceiling is about 10 metres at sea level. Real pumps manage 7 to 9. A well deeper than the stated figure cannot be drawn from by a surface pump at all, whatever its power.
No, and both listings say so. Maximum flow is measured at zero head and maximum head at zero flow. A pump lifting water 20 metres delivers far less than its headline litres per hour, and a sprinkler on the end needs both pressure and volume at the same time.
Storing a little pressurised water so that a small draw — filling a watering can, a short burst from a tap — is served by the tank rather than by starting the motor. It is what stops a booster pump switching on and off continuously, which is what wears one out.
1 200 W, 5 000 l/h, 50 m head, 8 m suction, 19 L stainless vessel
A 19-litre stainless vessel with an automatic pressure switch, 5 000 l/h and 50 m of head, on a stainless pump body.
Best for: A permanent rainwater or well supply where the water is drawn in short bursts through the day
1 200 W, 5 000 l/h, 45 m / 4.5 bar, 9 m suction, stainless
A stainless jet pump with a 9 m suction height — the highest here — a Noryl hydraulic unit and an anti-vibration handle.
Best for: Drawing from a deep cistern or a well, where the lift is the binding constraint
The live figure beside a product went and asked the shop for it the moment this page opened; any amount written into the text has not moved since the sentence was drafted, and it is the first of the two that counts.
