EVAK Trenchman range
EVAK Trenchman 400 230v
- Established 1975
- Trusted by thousands of customers
The EVAK Trenchman 400 (230V) is a heavy-duty submersible contractor drainage pump built for arduous trench dewatering and site drainage in silty, gritty water. A sintered SMF5030 agitator keeps sediment in suspension while pumping, so the Trenchman keeps working where a conventional drainage pump would clog. Auto (float switch) as standard, manual on request.
- Sintered SMF5030 agitator – keeps sediment in suspension
- Hytrel-coated steel vortex impeller – abrasion resistant
- FC200 cast iron pump casing, ADC12 aluminium motor housing
- 230V, 3A – plugs into standard UK mains, suited to permanent installations
More about this product
Overview
The EVAK Trenchman 400 (230V) is a heavy-duty submersible contractor drainage pump designed for arduous trench dewatering and site drainage in silty, gritty water. A sintered SMF5030 agitator sits below the impeller and keeps sediment in suspension while pumping – so the Trenchman keeps moving water where a conventional drainage pump would settle solids and choke. The 230V version plugs into standard UK mains, making it well suited to permanent installations, cellar drainage and sites where mains power is available rather than site-safety 110V. Auto operation with float switch is fitted as standard; manual variants are available on request.
Trenchman or Drainox?
The Trenchman and Drainox are both EVAK contractor site drainage pumps, sharing the same 2″ discharge and rugged build. The distinction is the agitator:
If your dewatering water is visibly silty or grit settles at the bottom of the sump, the Trenchman is the appropriate choice.
Key Features
Performance at a Glance
Technical Specification
| Voltage | 230V single-phase |
| Motor rating | 400W (0.5HP) |
| Current draw | 3A |
| Operation | Auto (float switch) as standard, manual on request |
| Max flow | 220 litres/min |
| Max head | 12 metres |
| Discharge | 2″ BSP female |
| Impeller | Hytrel-coated steel vortex, abrasion resistant |
| Agitator | SMF5030 sintered agitator – keeps solids in suspension |
| Seal | Double mechanical seal in oil bath – upper CA/CE, lower SIC/SIC |
| Motor protection | Oil-free motor, auto-reset thermal protector |
| Cable | 10m H07RN-F |
| Materials | Pump casing: FC200 cast iron; motor housing/cover: ADC12 aluminium alloy; strainer: PVC; handle: Nylon 6; shaft: SUS 410 |
| Weight | 13.5kg |
| Dimensions (A × B × C) | 243 × 211 × 352mm |
Applications
Arduous trench dewatering, construction site drainage in silty or gritty water, foundation and excavation work, permanent basement and cellar sump installations, and any site where a conventional drainage pump would clog with sediment. The 230V version plugs into standard UK mains, making it well suited to unattended permanent installations rather than site-safety 110V transformer duties.
FAQs
The sintered SMF5030 agitator sits below the impeller and mechanically disturbs settled sediment at the base of the sump, keeping silt and small solids suspended in the water column so they get pumped away rather than accumulating and blocking the pump inlet.
Yes – the 230V model plugs straight into standard UK mains, making it suited to permanent installations in cellars, basements and sumps where a socket is available.
Auto (float switch fitted) is supplied as standard and suits unattended installations in sumps 400mm diameter or wider. Manual is available on request for operator-controlled dewatering or where the sump is too narrow for the float switch to operate.
The Trenchman 750 delivers roughly 350 l/min and 15m head for larger sites or uphill discharge. The Trenchman 1500 delivers around 700 l/min and 20m head – the appropriate choice for heavy-duty continuous dewatering.
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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Frequently Asked Questions
Quick answers to common questions about the EVAK Trenchman 400 230v. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.
What is a submersible pump?
A submersible pump is designed to operate fully submerged in the liquid it is moving. The motor is sealed inside the pump body and cooled by the surrounding water. Submersibles are used for drainage, sewage, septic tanks, deep wells and boreholes, and for raising water from sumps, cellars and floodwater. Many stocked at Anglian Pumping handle solids in suspension.
Can submersible pumps handle solids and sewage?
Yes – some submersibles are designed for clean water only, others handle solids up to 50 mm or full raw sewage. Anglian Pumping stocks ABS, BBC, Flygt and T-T Submersibles ranges that include vortex, single channel and grinder impellers for different solids handling requirements. Always match the pump to the maximum solid size and the type of effluent it will see.
When should I use a submersible pump instead of a surface pump?
Use a submersible when the water level is more than around 8 metres below the pump installation point – surface pumps cannot self-prime beyond that depth. Submersibles are also better when the liquid contains solids, when noise must be minimised, or when the pump needs to operate in confined spaces such as sumps and chambers where a surface pump would not fit.