Automatic Commercial basement, Site & Plant Room Pump Kit | SPK530A

Automatic flood pump kit for commercial basements, plant rooms and lift pits

Around 5,650 litres an hour, running unattended, with nothing to commission.

This FPS Engineered™ kit pairs the Stream SPK530A heavy-duty automatic puddle sucker with 10m of 25mm suction and delivery hose and a hose clip. It is built for water that has to be dealt with on premises where nobody is going to notice it quickly: plant rooms, switch rooms, lift pits, basement stores and service voids.

The pump runs on a crab floor sensor, a compact water sensor on its own lead that sits flat on the floor and starts the pump at 20mm, stopping it at 10mm. There is no control panel, no probe and no wiring to terminate, which on a commercial site means no electrician, no commissioning visit and no enclosure to find space for.

Behind that sits a proper site pump: 0.53kW, a cast aluminium body and cast iron casing, a polyurethane vortex impeller that shrugs off the grit that collects in plant rooms, and 11 metres of head to reach street level from a deep basement.

Part of our wider pump kit, Stream pump, submersible pump and flood defence ranges.

Automatic operation without a control panel

At a glance

• Around 94 litres per minute at a 3m lift: Roughly 5,650 litres an hour through the hose supplied.
• 11 metres of maximum head: Reaches street level from a deep basement, still moving water at 9m.
• Clears to 10mm on automatic, which is lower than any other automatic pump we sell.
• No control panel, no wiring, no commissioning: Plugs into a 230V supply and works.
• Cast aluminium body, cast iron casing, polyurethane vortex impeller: Built for gritty water, not domestic duty.
• 5mm free passage and a 14kg mass that stays where you put it.
• Integral swing check valve: Backflow is dealt with inside the pump, so there is no separate non-return valve to buy or fit.
• Rotatable 25mm discharge: Two bolts to turn the outlet, which matters in a tight plant room.
• 3 year manufacturer's warranty from Stream Pumps.

What's included

• 1 × Stream SPK530A automatic puddle sucker, crab floor sensor fitted, 10m heavy-duty rubber cable
• 1 × 10m length of 25mm suction and delivery hose
• 1 × stainless steel hose clip, 20 to 32mm

Three items and it is a working installation. The pump supplies its own 25mm hose tail and its own non-return valve, so there are no extra fittings to buy. Reinforced suction and delivery hose rather than layflat, because in a plant room it has to hold its shape, run past pipework and not fold shut where something is stacked against it.

The non-return valve is built into the pump

What flow will I actually get at my lift?

Maximum flow and maximum head are the two ends of a pump curve and you never get both together. The figures below are read off the published SPK530A curve and include the friction in the 10m of 25mm hose supplied. Vertical lift means the height from the water surface up to wherever the hose discharges.

Calculated from the published SPK530A performance curve at n=2860 r/min, with hose friction by Hazen-Williams at C=130 across the 10m of 25mm hose supplied. Bends, kinks and a coiled hose all cost a little more, so run the discharge as straight as you can. To work out a specific run, use our pump performance calculator.

 

In practical terms: at a 3m lift this kit clears roughly 5,650 litres an hour, so a 100m² plant room under 50mm of water, some 5,000 litres, is gone inside the hour. On the slow ingress most basements actually get, it will hold the level at 10mm indefinitely and nobody will ever see standing water.

Which basement or plant room kit?

Four ways to protect a basement, and the right one depends on how much water arrives, how fast, and whether the pump is installed or carried to the job.

This kit is the one for an installed, unattended commercial application. It is the same pump as our Trade & Hire Kit, but made up for leaving in place rather than carrying about: the sensor does the switching, and there are no cam couplings because you connect it once. If the pump is going in and out of a van, buy the Trade & Hire Kit instead, since it clears to 1mm on manual and its quick-release couplings are what a hire fleet actually needs.

Technical specification

What can I use it for?

• Plant rooms, boiler rooms and switch rooms
• Lift pits and lift shaft bases
• Commercial basements and basement stores
• Service voids, ducts and riser bases
• Sprinkler and tank rooms
• Car park sumps and ramp gullies
• Retail and hospitality cellars
• Data and comms room voids where water must never reach the floor
• Managed residential blocks and student accommodation
• Standby cover on premises that are unstaffed overnight or at weekends

Water quality limits

Setting it up

Prime the pump before the first start. Fill the casing with clean water through the outlet until it reaches the top, roughly 2 litres, then run it for 3 to 10 minutes to confirm it is operating smoothly. Skipping this is the most common reason a new pump appears not to perform. Prime it again after any long period out of service.

Set the discharge orientation before you install. Undo the two bolts, turn the connector horizontal or vertical to suit the pipe run, and refit. Getting the outlet pointing the right way improves the flow you actually get.

Site the sensor where water reaches first, flat on the surface with clear space around it.

Run the discharge to a permanent outfall. The check valve is already in the pump, so there is nothing to add at the outlet. Fix the hose along its route so it cannot be dragged into the water or pulled off the tail, take it to a gully, drain or channel that will still be clear in a year, and keep the run as straight as the room allows.

Record it and test it. On a commercial site, put the pump on the planned maintenance schedule: test the sensor twice a year, flush the pump through with clean water after it has run on silty water, and check the discharge route is still clear.

Electrical safety and installation

Important: design and installation is site specific. Where a pump is being installed as permanent or standby flood protection for a commercial building, you should always consult a suitably qualified engineer on levels, flows and the discharge route, and a qualified electrician for the electrical connection. We supply equipment; we do not provide site-specific design advice over the phone, interested in our engineering review, read more here

Frequently asked questions

Do I need a control panel or an electrician?

No. The crab floor sensor is self-contained and the pump arrives assembled with a 10m cable. There is nothing to terminate and nothing to commission. That is the saving against a conventional automatic installation at this flow rate, which normally needs a separate level control, an enclosure and an electrician to wire it in. The supply itself still needs to be RCD protected and kept dry.

How low does it clear?

10mm on automatic, which is the sensor's switch-off level and the lowest of any automatic pump we sell. For comparison, a conventional float on a compact automatic typically stops at 25mm, and some larger automatic pumps do not stop until 70mm. Mounting the sensor vertically holds the pump running continuously and takes the level lower still, though in that position nothing stops it, so do not leave unattended.

Do I need to add a non-return valve?

No. The SPK530A has an integral swing check valve built into the discharge, so the water standing in the hose stays there when the pump switches off instead of running back and re-triggering the sensor. There is no separate valve to buy, no extra hose tail, and nothing that can be fitted the wrong way round. On a fixed installation with a vertical lift that is the feature that stops a standby pump short-cycling itself to failure.

Is 25mm hose big enough?

For a short run it is, and it matches the pump outlet so nothing needs adapting. On a longer run or a higher lift the hose becomes the limit rather than the pump: at a 3m lift over the 10m supplied you get around 94 L/min.

Does it need priming?

Yes. Fill the casing with clean water through the outlet, about 2 litres, then run it for 3 to 10 minutes before putting it into service. Prime it again after any long period standing.

Which voltage is it?

230V, with a tolerance of ±5%. For 110V site work, our Trade & Hire Kit uses the manual SPK530, which is available in both 110V and 230V.

Can it be left installed permanently?

Yes, and that is what it is for. Sited in a plant room or lift pit with the sensor at the low point, it will hold the level for long periods without attention. Put it on the planned maintenance schedule and test the sensor twice a year.

Will it cope with water arriving in bursts?

It will run, though water arriving suddenly makes any automatic pump start and stop more often, and frequent starts work a motor harder than steady running. Where inflow is heavy and intermittent, either monitor it or mount the sensor vertically and let it run through continuously. If inflow regularly exceeds around 6,000 litres an hour, the High-Flow Basement Kit is the better specification.

How is this different from the Trade & Hire Kit?

Same pump family, different job. This kit is the automatic version made up to be installed and left: the sensor switches it, and the hose connects once. The Trade & Hire Kit uses the manual SPK530 with cam couplings for quick connection and disconnection, clears to 1mm with an operative present, and comes in 110V as well as 230V. If the pump lives in a van, buy that one.