Boom pump vs line pump — which one do you need?

Boom pump: reach through the air

A boom pump parks, sets its outriggers, and unfolds an arm that carries concrete over whatever's in the way — fences, roofs, scaffold. If the site has room for the truck (roughly a parking space plus outrigger spread) and the pour is within the boom's reach, it's usually the faster, cleaner choice.

Common calls: house slabs, driveways poured over the fence line, suspended slabs, pools where the boom reaches over the house, and any multi-storey work.

The trade-off is footprint and overhead clearance: a boom needs solid, reasonably level ground to plant its outriggers safely, room either side for those outriggers to spread, and — critically — no live powerlines within the mandated exclusion distance of where the boom will swing. None of that is negotiable on the day, so it all has to be checked before the truck is booked, not after it arrives.

Line pump: reach along the ground

A line pump (often a trailer unit or smaller truck) pushes concrete through rubber and steel hoses along the ground — 20 m, 50 m, sometimes well beyond 100 m with the right setup. The crew lays and joins the line, and it goes wherever a hose can: through the garage, down the side path, into a basement carpark.

Common calls: backyard pours with no crane or boom access, footings and piers behind existing houses, internal ground floors, tight urban blocks, and long horizontal runs.

Because the machine itself is smaller and doesn't need to swing a boom, a line pump can often set up on a much smaller pad — sometimes just parked in the street or driveway — which is exactly why it wins the jobs a boom physically can't reach, regardless of price.

How the costs compare

Line pumps generally charge less per hour or per day than boom pumps, but the job can take longer once you allow for laying and cleaning the line, and you may need an extra line hand on the docket. Boom pumps cost more upfront and often carry a bigger call-out, but the pour itself is quicker because there's no hose to drag and reposition every time the pour point moves. For most jobs the honest answer is: whichever machine matches the access will be cheapest overall — forcing the wrong machine onto a site, either paying for a boom you didn't need or fighting a line pump through an access problem it can't solve, is what actually blows budgets.

See our concrete pump hire cost guide for the current ranges both types run at in Australia, since regional demand and boom size move the numbers more than the boom-vs-line choice does on its own.

The 30-second decision

Can a truck park within reach of the pour, with nothing overhead like powerlines? Boom pump. Is the pour hidden behind or under something, or the block too tight for outriggers? Line pump. Not sure? Measure the straight-line distance from where a truck could park to the furthest corner of the pour, note anything overhead, and give those two facts to the pump company — they'll pick the machine in one phone call.

The hybrid option: city pumps

Between the two sits the city pump — a compact truck-mounted pump, sometimes with a short boom, built specifically for tight metro streets where a full-size boom truck can't set up its outriggers. It trades maximum reach for a much smaller footprint, which is why you'll see them working terrace renovations and inner-city infill sites that would otherwise force a line pump. Not every company runs one, so it's worth asking specifically if your site is a genuinely tight urban block rather than just assuming a standard boom will fit, especially in older inner-suburb streets where parking and outrigger room are both scarce.

Crew and setup differences that affect your day

A boom job is typically one operator running the truck, outriggers and boom by remote control, with setup usually done inside 15–30 minutes once the truck is positioned. A line pump job almost always needs a line hand as well, to lay, join and then steer the delivery hose — and setup takes longer because the line has to be physically run out, connected and checked before the first load goes through. That extra time and extra person show up in how the job is quoted, not just in the hourly rate.

It also changes what you need to organise on your end. A boom job mostly needs clear truck access and overhead clearance sorted in advance. A line job benefits from someone walking the proposed hose route with the crew beforehand — checking gates are wide enough, garden beds won't be wrecked, and there's nothing in the path that will need to be moved mid-pour, because repositioning a live line once concrete is flowing is far more disruptive than repositioning a boom.

Safety considerations that differ between the two

Boom pumps put the risk in the air: powerline clearance, outrigger ground stability, and keeping people out from under a boom that's carrying tonnes of concrete and steel. Line pumps put more of the risk at ground level, concentrated in the delivery hose — hose whip during priming or when clearing a blockage is the single biggest hazard, which is why the hose must be secured and everyone kept clear of the discharge end whenever the line is being primed or cleared. Both machines are safe in the hands of a properly trained crew running the standard controls; neither is a machine to let an unsupervised labourer operate.

Licensing follows the same split: in Australia, operating a concrete placing boom is licensed high-risk work (the PB class), while line pump operation is generally covered by company training and competency rather than a separate high-risk work licence in most jurisdictions — though the operator and line hand still need to be properly trained and the two roles kept separate. If in doubt about what a specific job requires, ask the pump company directly rather than assuming.

Quick answers

What boom size do I need for a house slab?

Most single-dwelling slabs are handled by a 28–36 m boom. Pouring over the house into a backyard usually needs 36–47 m depending on the setback. When genuinely in doubt, a slightly bigger boom costs less than a stuck or repositioned pour.

Can a line pump do a second-storey pour?

Yes — line pumps push concrete vertically too (that's how high-rise cores are done). For a typical two-storey house it's routine; the trade-off is running the line up and securing it properly on the way, versus a boom simply reaching over the top.

Do I need both on one job?

Occasionally — a boom parked out front feeding a line run to a rear extension is a real setup for very tight sites, especially renovations where only part of the block is accessible to a truck. Your pump operator will tell you if the job genuinely needs it, and it's worth asking early since it changes the quote.

Is one type safer than the other?

Both carry real risks that are managed the same way regardless of type — hose whip during priming or a blockage, powerline contact for booms, and outrigger/ground stability. A line pump swaps 'boom near powerlines' risk for 'crew handling a pressurised hose' risk; neither is inherently safer, they're just different hazards that need the same discipline to control properly.

Which is cheaper to run for a pumping business?

Trailer and line pumps generally cost less to buy, insure and maintain than a full boom truck, which is why many owner-operators start there. Booms earn a higher rate per hour and can clear bigger jobs faster, but carry higher finance, insurance and servicing costs — see our guide to buying your first pump for the fuller cost picture.

Can a builder just ask for 'whatever's cheapest' and let the company decide?

You can, but it usually backfires — a company quoting blind without knowing your access will either quote conservatively high to cover the risk, or send the wrong machine and charge extra on the day for repositioning or a second visit. Describing your access honestly up front, even roughly with a couple of photos, almost always gets you a fairer price than leaving the machine choice to guesswork.

Keep reading

• What is a concrete pump and how does it work?
• What size concrete pump do I need?
• Types of concrete pumps: boom, line, trailer, city and static