Accessories

Booster Pumps

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A booster pump holds steady pressure in a water system: it draws from the mains, a storage tank or a well and delivers water to every outlet, starting on its own the moment a tap opens. Our sets lift water 50–60 m and move 3–8 m³/h, which covers a house, a workshop and a site welfare unit. Each one runs with a pressure vessel and electronic control, so the motor does not cycle when nobody is drawing water.

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The three builds differ in how they raise pressure. A self-priming pump copes with an air-locked suction line and a water level a few metres below the pump. A multistage pump adds pressure across several impellers in sequence, so at the same input power it reaches higher and runs quieter. The 2,2 kW unit adds an inverter that matches motor speed to demand. Dirty water needs a different machine — see trash pumps and submersible excavation pumps. Hoses, couplings and fittings sit in pump accessories.

Where a booster pump earns its place

A booster pump does one job: it restores pressure the supply cannot deliver on its own. Everything else follows from where the water comes from and how far up it has to travel.

Weak mains pressure

Water arrives weakly at the end of a long service pipe, on upper floors and whenever several outlets run at once. Every 10 m of head is roughly 1 bar, so a pump rated for 50 m leaves headroom of about 5 bar before pipe and fitting losses are subtracted. A multistage build suits this duty best, because it raises pressure in stages and runs more steadily than a single-impeller pump.

Supply from a tank or a well

Where there is no mains connection, the pump has to hold pressure across the whole system and start at every tap. Three outlets running together — shower, dishwasher, kitchen tap — call for roughly 2,5–3 m³/h, so a 3 m³/h unit covers a household with margin. A self-priming build matters here: it clears the air from the suction line instead of stalling on it.

Irrigation and site welfare

Watering from a tank, washing plant, feeding a site cabin — this duty is about flow rather than height. A pump delivering 8 m³/h through a 40 mm port runs several sprinklers at once or fills a process tank. The water has to be clean: sand and suspended solids wear impellers quickly, and liquid carrying debris belongs in a trash pump, which passes solids up to 27 mm.

Toolsa booster pump specifications

Model Type Power Port Max head Flow Control
TAPM1-800 self-priming 0,8 kW 25 mm 50 m 3 m³/h electronic pressure switch
TAPM2-50/4-0.95 multistage 0,95 kW 25 mm 60 m 3 m³/h electronic pressure switch
TAAMG-2.2 centrifugal 2,2 kW 40 mm 50 m 8 m³/h inverter

All three have stainless steel wet ends and run with a diaphragm pressure vessel that absorbs short draw-offs without starting the motor. A 230 V supply means they plug into an ordinary socket.

Sizing a booster pump

Start with head. Add the height between the pump and the highest outlet, then allow roughly 1 bar — about 10 m — for pipe and fitting losses. If the total passes 50 m, choose the multistage build: it reaches 60 m on the same input power of around 1 kW.

Then work out flow. A single outlet draws roughly 0,6 m³/h, so a house with three simultaneous draw-offs sits inside 3 m³/h. Irrigation, plant washing and welfare supply start above 5 m³/h, which is where the 2,2 kW unit with a 40 mm port belongs.

Finally, the control. An electronic pressure switch starts the pump on a pressure drop and stops it once the tap closes. An inverter goes further: it varies motor speed continuously, so pressure stays level when a second outlet opens, and the motor starts softly instead of drawing several times its rated current.

Frequently asked questions

What is a booster pump used for?

A booster pump raises water pressure where the supply cannot provide enough on its own. It takes water from the mains, a storage tank or a well and delivers it to taps, showers and appliances at a usable pressure. A domestic system normally works between 2 and 4 bar, which corresponds to a water column of 20–40 m, and that is what the pump has to reproduce. It starts automatically when pressure falls below the set point and stops once pressure recovers, so nobody has to switch it on and off. Our sets reach 50–60 m of head and run from a 230 V supply.

What is the difference between a pressure pump and a booster pump?

The terms overlap in everyday use, and the meaningful difference is what the machine is built to do. A transfer pump moves volume at low head — plenty of litres, little pressure. A booster pump is built the other way round: high pressure at moderate flow, for example 50–60 m of head at 3 m³/h. It also carries the parts that make automatic operation possible: a pressure switch or inverter, a diaphragm vessel and a non-return valve. Without those a pump runs continuously and cannot hold a system at pressure.

Can a booster pump increase water pressure?

Raising pressure is exactly what the machine does, within the limit set by its head rating. A pump rated for 50 m can add roughly 5 bar to the pressure already present, minus losses in pipework, bends and filters. What it cannot do is create flow that is not there: if the incoming supply delivers only a trickle, boosting pressure will not increase the volume available. In that case the answer is a storage tank feeding the pump, so the pump draws from a reservoir rather than fighting a starved supply line.

Can a booster pump be fitted to a mains supply?

Direct connection to a mains supply is regulated in many countries, and water undertakers commonly limit how much a pump may draw straight from the main to protect pressure for neighbouring properties. The usual compliant arrangement is a break tank: mains water fills the tank, and the booster pump draws from the tank rather than from the main itself. Check the rules that apply at the installation address before connecting anything — the requirement varies between suppliers and jurisdictions, and getting it wrong can mean removing the installation.

What size booster pump do I need?

Two figures decide it: head and flow. Measure the height from the pump to the highest outlet, add about 10 m for friction losses, and pick a pump whose maximum head clears that total with margin. For flow, count outlets that may run at the same time at roughly 0,6 m³/h each — a family house rarely exceeds 3 m³/h. Oversizing is not free: a pump far larger than the demand cycles more often on short draw-offs and wears its pressure switch faster than a correctly matched unit.

Why does a booster pump need a pressure vessel?

The diaphragm vessel stores a few litres of water under pressure and releases it during short draw-offs — a toilet flush of about 6 l, a quick hand wash — without starting the motor. Without it the pump would start at every tap, and each start draws several times the rated current and wears the switch contacts. A membrane separates the water from an air cushion, so the cushion pressure needs checking once a season with a gauge: it should sit about 0,2 bar below the pump cut-in pressure. A failed membrane shows up as rapid cycling.

What does an inverter add to a booster pump?

An inverter varies the supply frequency, so the pump matches its speed to actual demand instead of switching between full speed and off. Pressure stays at the set point even when a second outlet opens, and the motor ramps up smoothly — no water hammer and no repeated current surge at every start. Over a working week of variable demand this means lower energy use and less wear on the mechanical seal. In this range the inverter is fitted to the 2,2 kW unit rated at 8 m³/h.

What wears out first in a booster pump?

The mechanical seal on the shaft goes first, especially if the pump has ever run dry — a few tens of seconds without water is enough to overheat it. The pressure vessel is next: the membrane hardens and loses its seal after 3–5 years, which shows as the motor starting every few seconds on a small draw-off. Third is the pressure switch, whose contacts burn faster the more often the pump starts, which is why a cushion set 0,2 bar below cut-in extends the life of the whole set. Stainless steel impellers and casings outlast all of these, provided the water is clean.