Mains pressure is fine for a two-storey house, but it runs out quickly when you need to feed the upper floors of an apartment block, supply an industrial process, or hold steady pressure across a building where demand swings through the day. A booster set lifts incoming pressure to a controlled level and holds it there, whatever the draw on the system.
We supply booster sets in two ways: pre-fabricated units from Calpeda, Ebara and Lowara, and bespoke sets engineered around a specific duty. Both are covered below. If you would rather talk it through, call 01332 913500.
The term covers a packaged system rather than a single component. A booster set brings together one or more centrifugal pumps on a shared base, a control panel that sequences them, pressure sensors, a pressure vessel to soak up demand swings, and the valves and manifolds that tie it all together. People also call them pressure booster sets or water booster pump sets; the kit is the same.
Most modern sets run on variable speed drives. Instead of switching pumps hard on and off against a pressure switch, the drive trims motor speed to track demand. You get steadier outlet pressure, lower running costs and less wear on the pumps, because they are not constantly starting and stopping.
The number of pumps in a set comes down to the duty and how much resilience you need.
Single pump sets suit small commercial units, domestic properties on weak mains, and light-duty jobs where there is no standby requirement.
Twin sets are the workhorse of commercial buildings. The two pumps alternate the duty so they wear evenly, and if one drops out the other picks up the load. For most commercial and light industrial sites this is the sensible balance of cost against reliability.
Triple and multi-pump sets come into their own on large or variable demand: hotels, hospitals, high-rise residential and industrial plant. The duty splits across the pumps, with one trimming on a drive to hold pressure while the others cut in as needed.
If you already know how many pumps you need, start here:
Pre-fabricated booster sets are built to standard configurations by the manufacturer and factory tested. If your duty point sits inside a standard range, this is almost always the quickest and most cost-effective route.
A bespoke packaged booster set is engineered around the job when the standard ranges will not do: an unusual flow and head combination, a tight footprint, stainless construction for hygienic duty, or integration with a building management system. Plenty of projects sit on the line between the two, and we will tell you honestly which side yours falls on.
Most booster set information online is written for building services. Industrial sites have different priorities: stable pressure to process equipment, washdown and cooling circuits, resilience so a single pump fault does not stop a line, and materials that suit the water being handled.
For those duties we specify stainless steel multistage pumps, variable speed control to hold pressure as process demand changes, and N+1 redundancy where downtime costs more than the extra pump. Where a set draws from a break tank rather than directly off the mains, the tank also provides the air gap needed on higher-risk connections. Tell us the duty, the water and what the set is feeding and we will put a recommendation together.
A set that is the wrong size is the most common cause of trouble down the line. Oversized sets cycle and wear early; undersized ones cannot meet peak demand. The calculation rests on peak flow (the outlets and their diversity), total head (static lift, friction losses and the residual pressure you need at the furthest outlet), how much the mains is already giving you, and whether demand is steady or spiky. CIBSE and BSRIA guidance frames most commercial work.
We specify sets using ranges from Calpeda, Ebara and Lowara, and will source other manufacturers if a project calls for it. Email a schedule of outlets and any mains pressure data to sales@tfpumps.com or call 01332 913500, and we will work up a recommendation and a price.
If your questions have not been answered here, get in touch with our team for more information.
Sizing comes down to four things: peak flow demand across the outlets being served, the total head the pumps must overcome (height, pipework losses and the pressure you need at the furthest outlet), the incoming mains pressure, and whether demand is steady or spiky. Send us a schedule of outlets and any pressure data you have and we will specify the set.
A booster pump is a single pump. A booster set is an engineered package: one or more pumps on a common base with a control panel, pressure vessel, manifolds and valves, all built to work together. The set is what you install in a building; the pump is the component inside it.
Single sets suit small properties and light duties with no standby requirement. Twin sets are the usual choice for commercial buildings, because the pumps share the duty and one can carry the load if the other fails. Three pump and larger sets suit high or variable demand, where the load is split across several pumps.
Yes, with the right protection. Outdoor sets on industrial and agricultural sites need a suitably IP-rated control panel, frost protection and a weatherproof enclosure.
Yes. When a standard range does not fit the duty, footprint or materials required, we build packaged sets around the job, including stainless construction and BMS integration. Call 01332 913500 or email sales@tfpumps.com with the details.
