Description
The Pentair Waterpress Multi Evo-A 5-50M+ (code 022-500) is the large-vessel version of the Multi Evo-A booster set. It uses the same Multi EVO-A 5-50 M self-priming multistage pump, delivering 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.
The larger vessel stores more pressurised water between pump starts. A basin tap, a toilet refilling or a dishwasher filling is then supplied from the vessel without the pump cutting in, which means fewer starts, less wear on the motor and pressure switch and a steadier supply in a busy property. Performance is identical to the Multi Evo-A 5-50M, which has the compact vessel and is the better fit where floor space is tight. Please call us for the vessel volume and footprint of the version currently supplied before you order.
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
- Large horizontal pressure vessel for fewer pump starts
- Self-priming horizontal multistage pump
- 56 m at 20 l/min, 40.5 m at 60 l/min, up to 120 l/min
- 0.95 kW motor, 230v single-phase, 6.2 A, IP55, Class F
- Thermal protection built into the motor winding
- Pressure switch with adjustable cut-in, 6 bar gauge, five-way brass manifold
- Supplied assembled and wired
Applications
- Larger homes with several bathrooms in regular use
- Guest houses, holiday lets and small commercial buildings
- Properties with frequent small draws, where reducing pump starts matters
- Washing and irrigation systems 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.
