Products
LEO MRC55
550 W intelligent permanent magnet booster. Rated duty 2.5 m³/h at 25 m head.
LEO MRC55 Intelligent Permanent Magnet Pump
Residential pressure boosting for clear water and other low-viscosity, non-corrosive liquids.
| Power | 550 W |
|---|---|
| Rated flow | 2.5 m³/h |
| Rated head | 25 m |
| Maximum flow | 5 m³/h |
| Maximum head | 35 m |
| Liquid temperature | 0–35 °C |
| Ambient temperature | 0–40 °C |
| Liquid pH | 6.5–8.5 |
| Protection class | IPX4 |
The series provides constant-pressure control, water-cooled operation, dual outlets, anti-freeze, dry-run and anti-jam protection, fault alerts and power-off memory. The series brochure advertises noise down to 41 dB; this is not a guaranteed model-specific sound level.
MRC55 hydraulic curve
Qualified model-specific source-plot reference; not a supplied-unit acceptance curve.
This limited reference reproduces the named primary poster trace. It is not an exact manufacturer Q/H table, certified acceptance curve, guaranteed duty or complete operating envelope. Reading allowances are +/-0.4 m head and +/-0.05 m3/h flow for reproduction only, NOT pump performance tolerances. The source plot begins near H5 m at its lower boundary, not zero; its finite drawn extent and numerical maximum-flow row disagree. No endpoint, zero-head flow or rated duty is invented or forced.
| Q 0.25 m3/h | Approximately 35.0 m head |
|---|---|
| Q 0.5 m3/h | Approximately 35.0 m head |
| Q 0.75 m3/h | Approximately 35.0 m head |
| Q 1.0 m3/h | Approximately 35.0 m head |
| Q 1.25 m3/h | Approximately 33.9 m head |
| Q 1.5 m3/h | Approximately 32.4 m head |
| Q 1.75 m3/h | Approximately 30.8 m head |
| Q 2.0 m3/h | Approximately 29.1 m head |
| Q 2.25 m3/h | Approximately 27.3 m head |
| Q 2.5 m3/h | Approximately 25.5 m head |
| Q 2.75 m3/h | Approximately 23.6 m head |
| Q 3.0 m3/h | Approximately 21.7 m head |
| Q 3.25 m3/h | Approximately 19.7 m head |
| Q 3.5 m3/h | Approximately 17.8 m head |
| Q 3.75 m3/h | Approximately 15.8 m head |
| Q 4.0 m3/h | Approximately 13.7 m head |
| Q 4.25 m3/h | Approximately 11.7 m head |
| Q 4.5 m3/h | Approximately 9.6 m head |
| Q 4.75 m3/h | Approximately 7.5 m head |
Installation and supplied-version hold
The regional manufacturer-manual drawing and source-version electrical references below are now available. The actual supplied South African assembly, connection thread form, installation clearances and electrical revision remain unconfirmed. The earlier poster curve/table differences are not resolved by this drawing. Confirm the actual supplied unit and duty with Krächtig before selection or installation.
Dimensions and connections
MRC55 regional manufacturer-manual reference
A LEO-branded operating manual naming MRC55 was inspected on 20 October 2026. Its original drawing and explicit model table provide the source dimensions below. The table expressly groups MRC37, MRC55 and MRC75; values are not borrowed from an unnamed similar pump. This regional source is not confirmation of the South African supplied assembly.
| MRC55 source dimension | mm |
|---|---|
| L | 250 |
| H | 280 |
| W | 168 |
| H1 | 35 |
| H2 | 84 |
| H3 | 106 |
| L1 | 81 |
The manual specifies a 220 V, 50 Hz source version, 550 W consumed power and 4.3 A working current for MRC55. These are regional source-version references, not verified nameplate ratings of the actual supplied unit. It specifies 1-inch inlet/outlet thread diameters, but does not identify the thread form; BSP or NPT is not assumed. The two outlets are described as alternatives, not for simultaneous use.
Retain the drawing labels exactly; the table is not a complete installation-clearance envelope. Check the supplied revision, interfaces and access clearances before installation. The existing poster performance references remain separate and unchanged, including the unresolved maximum-flow versus drawn-trace differences. No new performance curve, guaranteed duty, tolerance, speed, availability or pricing is inferred from this dimensional reference.