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Workhorse Air Compressor Tandem 4hp 250l

Name: Workhorse Air Compressor Tandem 4hp 250l
Brand: wilkinsonstar247
SKU: WRT36-250S-1
Price: 1925.00 GBP
Availability: InStock

£1,925.00

Shipping calculated at checkout.

Workhorse Air Compressor Tandem 4hp 250l is a powerful static belt-driven unit designed for professional bodyshops and workshops needing higher continuous air delivery from single-phase supply.

Key Features

Tandem pump configuration
Approx. 250 litre receiver
Suitable for bodyshop tooling
Single phase workshop supply
Cast iron pump construction
Automatic start stop control

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Supply

400V - 45A

Warranty

2 Years

Free Delivery

UK mainland delivery

Service

In-house engineers

Support

0161 223 1843

Engineer Advice

Mark Allen says

This is a static tandem piston air compressor intended for running multiple air tools or higher-demand kit from a single phase 230 V supply. In a bodyshop or fabrication workshop it suits spray guns, DA sanders, small blast pots and general air tools where you need reasonable continuous flow rather than short bursts.

With tandem units, correct electrical provision is critical. A 2 x 3 hp or 2 x 4 hp 250 litre machine typically wants a dedicated 30 A supply and sensible cable sizing to avoid volt drop and nuisance tripping. Mount it on a firm, level floor with anti-vibration mounts if possible, and allow space around the receiver and pump for cooling and access.

In practice, the common issues I see are undersized ring mains, restricted intake (compressor jammed in a corner), and neglected condensate draining, which leads to water in lines and tool corrosion. Set up with proper power, good ventilation, a decent water separator and routine maintenance, a tandem 250 litre unit is a reliable workhorse that will comfortably handle day-to-day professional workshop demands.

Mark Allen, Senior Engineer

Technical Features

Twin 4 hp motors with tandem beltdriven pumps provide high air delivery from a singlephase 230 V supply, giving capacity closer to a small threephase machine while still running on workshop mains.
Large 250 litre receiver offers good air storage for running higher demand tools such as spray guns, DA sanders and impact tools with fewer compressor start cycles.
Durable cast iron cylinder blocks and twincylinder pumps are designed for continuous workshop duty with better heat dissipation and long service life.
Tandem pump layout gives builtin redundancy, allowing the compressor to keep supplying air (at reduced output) if one pump or motor is taken out of service.
Automatic stop/start control via pressure switch maintains receiver pressure without constant operator intervention, helping reduce wear and power consumption.
Slowrunning pump speed keeps mechanical stress and operating noise down, making it better suited to busy bodyshops where the compressor will be running for long periods.
Heavyduty industrial motors with overload protection help protect against overheating and nuisance failures in realworld workshop conditions.
Fitted aftercooling improves removal of condensed water from the compressed air, reducing moisture load on downstream dryers, filters and air tools.
Receiver manufactured to comply with current pressure vessel regulations, making it suitable for professional bodyshop and garage installations subject to insurance inspections.
Prewired singlephase 230 V package simplifies installation in small to medium workshops that do not have threephase available, subject to suitable highamperage supply and fusing.
Britishbuilt unit, assembled and tested in Manchester, supports ready availability of genuine parts and technical support through BWS engineers.
Supplied with a 2year limited/onsite warranty, giving trade users confidence for regular professional use when maintained correctly.

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We also have some of the most experienced engineers in the industry who are able to offer full technical support on top of what the manufacturers offer.

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Specification

Brand

Workhorse (Fiac)

Model

WRT36-250S-1

Motor Power

2 x 4 HP

Total Motor Power

8 HP

Air Receiver Capacity

250 litres

Displacement

35.4 CFM

Free Air Delivery

26.4 CFM

Maximum Pressure

10 bar

Power Supply Voltage

230V

Electrical Phase

Single phase

Configuration

Tandem belt-driven, twin pumps

Cylinder Block

Cast iron

Tank Orientation

Horizontal

Dimensions

1750 x 480 x 1200 mm (L x W x H)

Country of Manufacture

UK (Manchester)

Warranty

2-year limited warranty

FAQs

What duty cycle and air delivery can I expect from the Workhorse Tandem 4hp 250l compressor in a busy workshop?

The tandem 4hp 250 litre model (WRT36-250S-1) uses twin 4hp pumps on a 250l receiver, giving around 35.4 CFM displacement and 26.4 CFM free air delivery. This is suitable for sustained use with most bodyshop tools, including DA sanders, spray guns, small blast pots and air drills, provided the line is sized correctly and the compressor is allowed to cycle rather than run flat out continuously.

What power supply and electrical protection does the Workhorse Tandem 4hp 250l require?

It is a single-phase 230–240V machine with two 4hp motors and needs a dedicated high-amperage supply, typically a 45A fused or breaker-protected circuit. In practice, that means running it from its own suitably rated radial circuit rather than a shared ring main, with correct cable sizing and motor overload protection. BWS can advise on installation and can work with your electrician to ensure it is wired safely in line with workshop regulations.

Is the Workhorse Tandem 4hp 250l suitable as the main shop compressor or only as a backup unit?

For most single-phase workshops and bodyshops it is capable of acting as the main compressor, as the tandem design effectively doubles the available air output compared with a single 4hp unit. Many garages use it as their primary source of air for panel prep, light spray work and general tools. It also works well as a backup or second line compressor alongside a larger three‑phase unit, giving redundancy – if one pump or motor fails, the other can be repaired while the shop still has air available.

How noisy is the Workhorse Tandem 4hp 250l and where is best to install it in a bodyshop or garage?

The Workhorse tandem units are slow‑running, belt‑driven cast‑iron pumps, typically around the high‑70s dB(A) region, so they are quieter than many high‑speed DIY compressors but still best housed in a dedicated compressor corner or plant room. For professional use, we recommend mounting it on a level floor, keeping at least 500mm clearance around the machine, using flexible hose to connect into the fixed air system, and ensuring good ventilation so the motors and pump stay cool. BWS engineers can advise on pipework layout, receiver drain access and filtration to suit your existing spray and tool setup.