This guide explains typical reach figures for both line pumps and boom pumps, the factors that reduce effective range on a real site, and how to assess whether your project actually needs a pump at all.
Line Pumps: How Far Can They Reach Horizontally?
A line pump — also called a trailer pump or static pump — uses a hydraulic piston to push concrete through a series of connected rubber or steel pipes laid along the ground. The pump unit itself sits near the mixer truck, and the pipe is extended section by section toward the pour point.
Typical horizontal reach: up to 150 metres.
That figure assumes a flat run with minimal bends and a pump-friendly mix. In practice, most residential and light commercial jobs sit well within that range — usually between 20 and 80 metres of pipe — so line pumps cover the vast majority of domestic pours without difficulty.
What makes a line pump the right tool:
- Access through narrow gates, side passages, or alleyways
- Back gardens with no direct vehicle access
- Basement or subfloor pours reached through a doorway or window opening
- Smaller volumes where a boom pump would be excessive
Boom Pumps: How Far Can They Reach Vertically?
A boom pump is mounted on a lorry and uses a folding articulated arm — the boom — to position a pipe over the pour location. Because the boom moves independently of the truck, it can place concrete at height, over obstacles, or into areas that would require a long and complicated hose run with a line pump.
Typical vertical reach: 24 to 42 metres for the boom pumps most commonly used on UK construction sites. Some larger units reach beyond this, but for the majority of commercial and residential builds, a 42-metre boom covers multi-storey pours comfortably.
Boom pumps are the standard choice for:
- Upper floor slabs and decks
- Large-volume commercial foundations
- Agricultural hardstandings or industrial floor pours
- Any site where a truck can park clear of the pour zone and the boom reaches over the top
What Reduces Effective Reach?
Theoretical maximums rarely apply in full on a working site. Several factors cut into the usable range of either pump type.
| Factor | Effect on Reach |
|---|---|
| Pipe bends and elbows | Each 90° bend is roughly equivalent to 3–5 metres of straight pipe in terms of pressure loss |
| Elevation gain | Pumping uphill increases back-pressure; every metre of height reduces horizontal range |
| Concrete mix design | Stiff, low-slump mixes (S1/S2) are harder to pump than wetter S3/S4 mixes; they increase pressure requirements |
| Aggregate size | Larger aggregate increases friction inside the pipe |
| Pipe diameter | Narrower pipes reduce flow rate and maximum distance |
| Ambient temperature | Cold weather thickens the mix; hot weather accelerates set and can cause blockages |
| Pipe condition | Worn or poorly jointed sections increase friction and risk of blowouts |
The key takeaway: always plan your pipe route with the minimum number of bends possible, and discuss mix design with your supplier before booking. For structural pours requiring C30/C35 concrete, which uses a stiffer S3 slump, ensuring the mix remains pumpable at the required reach is particularly important.
Does Your Site Actually Need a Pump?
Not every pour does. A concrete pump earns its cost when:
- The mixer truck cannot get close enough to tip directly into shuttering or a skip
- The pour point is elevated, underground, or across obstacles
- The volume is large enough that manual barrow runs would slow the job significantly
- The site layout makes any direct approach impractical
A useful rule of thumb: if the mixer truck can park within about 3–4 metres of the pour point and tip directly, a pump adds cost without adding much benefit on smaller jobs. If there is a wall, a narrow passage, a height difference, or more than 5–6 metres of open ground between truck and pour, a pump is almost always the right call.
Safety on Site: Working with Wet Concrete
Whatever pump type you use, wet concrete is an alkaline material that can cause serious skin burns on prolonged contact — injuries that may not be immediately painful but can worsen over hours. The Health and Safety Executive’s guidance on concrete covers the key risks associated with working in the concrete industry, including handling and skin exposure.
Practical precautions before any pumped pour:
- Waterproof gloves and steel-toecap boots as a minimum
- Eye protection worn throughout the pour and washout
- Designated washout area away from drains or watercourses
- A water source on site for cleaning hands, equipment, and any splashes
Briefing your team on these basics before the pump arrives avoids avoidable injuries and keeps the pour running without interruption.
Planning Your Pump Hire in Cambridgeshire
When you contact a supplier, the more information you can provide about site layout and pour distance, the more accurately they can specify the right pump and pipe configuration. Details that help:
- The distance in metres from where the truck will park to the pour point
- Any height difference between truck and pour location
- Number of corners or changes of direction in the pipe route
- Gate widths and any overhead obstructions
- The concrete grade and slump class you intend to use
For concrete pumping services in Cambridgeshire, Cardinalis Concrete runs both line and boom pumps across the region, covering Cambridge, Peterborough, Ely, Huntingdon, St Neots, and the surrounding villages. The team can advise on mix selection, pipe routing, and pump type based on your specific site before you commit to a booking.
Quick Reference: Line Pump vs Boom Pump
| Line Pump | Boom Pump | |
|---|---|---|
| Max horizontal reach | Up to 150m | Limited by boom position |
| Max vertical reach | Possible with pressure, limited by height | 24–42m (typical UK models) |
| Best access scenario | Tight sites, narrow passages | Open sites, upper floors, large volumes |
| Typical output | Up to 70m³/hr | High volume, rapid placement |
| Relative cost | Lower | Higher |
| Footprint | Small trailer unit | Large lorry with outriggers |
Summary
A line pump can reach up to 150 metres horizontally under good conditions — enough for the vast majority of domestic and light commercial jobs. A boom pump offers 24 to 42 metres of vertical reach and can place concrete over obstacles that would require a long hose run with a line pump. Both types lose effective range to bends, elevation, thick mixes, and cold temperatures, so planning the pipe route carefully and specifying the right mix are as important as choosing the right pump.
If you are unsure which type suits your pour, the simplest approach is to describe your site layout to your supplier and let them advise. A reputable local operator will tell you honestly whether a pump is needed at all — and if it is, which type gets the concrete where it needs to go.
