Description
The Pentair Waterpress Multi Evo-A 5-50M (code 022-495) is a complete automatic booster set built around the Multi EVO-A 5-50 M self-priming multistage pump, with the compact pressure vessel. It delivers up to 120 litres per minute and 56 metres of head at 20 l/min from a 0.95 kW motor drawing 6.2 A on 230v single-phase supply, through 1″ inlet and outlet connections.
This is the version to choose when floor space is limited: a utility room, under-stairs cupboard or small plant room. The Multi Evo-A 5-50M+ uses the same pump and controls with a much larger vessel, so the pump starts less often for small draws. If you only need better pressure at one or two outlets, the single-stage Superinox 90/50 is a smaller, lighter set.
The pump is the Pentair Nocchi Multi EVO-A 5-50 M, a self-priming horizontal multistage pump. Its body, hydraulic shaft and fill and drain plugs are stainless steel, the impellers, diffusers and priming valve are glass-reinforced PPO technopolymer, and the mechanical seal is carbon graphite on ceramic. The 2-pole motor runs at 2850 rpm, is IP55 rated with Class F insulation, and the single-phase winding has thermal protection built in. The set is supplied wired, with an electromechanical pressure switch set at about 2 bar cut-in and 3 bar cut-out (cut-in adjustable from 1.5 to 3 bar), a 6 bar gauge, a chrome-plated five-way brass manifold and a flexible connection hose.
Features
- Self-priming horizontal multistage pump: holds pressure as more outlets open
- 48.5 m at 40 l/min and 31 m at 80 l/min; maximum flow 120 l/min
- 0.95 kW motor, 230v single-phase, 6.2 A, thermal protection in the winding
- IP55 motor with Class F insulation
- Compact horizontal pressure vessel for tight spaces
- Pressure switch set at about 2 to 3 bar, with 6 bar gauge
- Stainless steel pump body, technopolymer impellers and diffusers
- Supplied assembled and wired
Applications
- Whole-house pressure boosting from a break tank or cistern
- Homes with two or more showers used at the same time
- Small offices, workshops and guest houses
- Washing systems and irrigation with clean water
Performance
| Flow (l/min) | 20 | 30 | 40 | 50 | 60 | 80 | 100 | 120 |
|---|---|---|---|---|---|---|---|---|
| Head (m) | 56 | 52 | 48.5 | 45 | 40.5 | 31 | 21.5 | 10 |
For clean water without suspended solids or abrasive material, up to 50°C, with a maximum operating pressure of 8 bar. It is a cold water booster and must never run dry, so protect it against a break tank running empty. In the UK it should not be connected directly to the mains supply pipe without the water supplier’s consent; it normally draws from a break tank or cistern.
The Multi Evo-A booster range
| Model | Vessel | Motor (kW) | Current (A) | Head at 20 l/min (m) | Head at 40 l/min (m) | Head at 80 l/min (m) | Max Flow (l/min) | Connections |
|---|---|---|---|---|---|---|---|---|
| Multi Evo-A 5-50M | Compact | 0.95 | 6.2 | 56 | 48.5 | 31 | 120 | 1″ in and out |
| Multi Evo-A 5-50M+ | Large | 0.95 | 6.2 | 56 | 48.5 | 31 | 120 | 1″ in and out |
Head figures are Pentair’s published performance for the Multi EVO-A 5-50 M pump on 230v single-phase supply. See the Pentair Nocchi Multi Evo-A booster range page for help choosing and answers to common questions.
