What to Consider When Specifying a Vortech™ Poly Pump Station

Performance starts with the right specification. Specifying a pump station is a foundational design decision; late or unclear specification risks redesigns, avoidable site delays and common pump problems. This guide provides civil engineers, architects, contractors, and developers with a practical pre-specification checklist.

The Vortech™ Poly Pump Station

The Vortech™ Poly Pump Station provides a cost-effective range of underground packaged pumping solutions engineered for domestic and light commercial environments. Supplied as complete units ready for installation, they arrive pre-fitted with internal pipework, valves and guide rail systems to eliminate on-site assembly headaches.

Key Features and Benefits

• Durability: Robust high-quality polyethylene chambers resist corrosion, with external ribs that interlock with the concrete surround.
• Hydraulic efficiency: Smooth interiors and self-cleaning bases help direct solids to the pump suction area.
• Installation flexibility: Inlet connections can be drilled on site at the required depth and orientation.
• Offsite production: Supplied as a complete, pre-fabricated package, Vortech™ stations arrive ready for ‘plug and play’ installation, reducing on-site assembly time and project risk.

Application

The Vortech™ Poly Pump Station is designed to collect and lift wastewater below ground wherever gravity drainage isn’t possible, moving effluent onward to the main drainage or sewer network. It handles three main jobs depending on the pump fitted:

• Draining surface water and grey water (rainwater, run-off and light domestic wastewater)
• Pumping foul water and raw sewage
• Macerating solids from raw sewage with heavy-duty grinder pumps

With a compact chamber design suited to tight below-ground spaces such as basements and cellars, the Vortech™ Poly range supports domestic and light-commercial wastewater applications across residential developments, commercial developments, and wider civil drainage schemes.

View the Vortech™ Poly Pump Station

Specifying a Vortech™ Poly Pump Station

Understanding what the different types of pump stations do it only the first step, correct specification is what ensures reliable performance, straightforward installation and long-term operation. Before selecting a model, it’s essential to consider the following key design requirements.

1. Flow rates and pump duty

Why it matters

Pump duty balances peak inflows against system resistance. The required flow should be checked against the vertical lift, the discharge route, and friction losses in the rising main to establish an efficient operating point. An undersized pump may fail to empty the chamber during peak loading, risking overflow; an oversized one can short-cycle, causing operational and mechanical issues.

How to match a Vortech™ pump to your application

• Match the pump type to the wastewater: Vortech™ options include vortex pumps for grey water and foul/grey water, plus grinder pump options for foul water applications.
• Check rising main velocity: The system should move wastewater fast enough to prevent solids settling, but not so fast that friction losses, energy use and wear increase.
• Select the right pump arrangement: Compact models are single-pump, Regular models are available as single or twin pump stations, and Grand models are twin pump as standard.
• Confirm the power supply: Flow rate, head, wastewater type and pump configuration should be checked against the relevant Vortech™ datasheet before specification.

Need help with your initial design? Read our guide on selecting and sizing poly pump stations to master the foundational criteria.

2. Storage allowance

Why it matters

Storage allowance is the volume the chamber holds before the duty pump activates, plus the critical emergency reserve above the high-level alarm. Adequate wet-well storage is the primary safeguard against property flooding. Too little causes short-cycling and mechanical issues; too much increases retention time, allowing sewage to turn anaerobic and corrosive.

How is storage calculated?

Calculate storage requirements using recognised sizing methods, such as British Water loading units or project-specific flow calculations. Volume should factor in appliances served, peak inflow, pump-out rate, attenuation needs and inlet invert level.

Setting the right operating volume

1. Calculate storage against the actual site demand, not the chamber capacity alone.
2. Allow for routine pump cycling and emergency reserve.
3. Coordinate storage with the incoming inlet invert and high-level alarm.
4. Check that the selected chamber has enough room for float switch operation without obstruction.
5. Confirm whether any additional attenuation or authority-specific storage requirement applies.

The Vortech™ Poly range includes chamber capacities from 280 litres in Compact models up to 9,000 litres in the Grand 40 models.

3. Chamber size and depth

Why it matters

Chamber size is determined by required storage volume, inlet depth, and site constraints. It must provide enough hydraulic capacity while aligning with incoming drainage, finished ground level and maintenance access. Considering depth too late can force costly redesigns: revised drainage falls, altered inlet levels or an alternative pump station.

Choosing the right Vortech™ chamber

• Compact models are suited to smaller or tighter applications.
• Regular models offer larger chamber sizes and single or twin pump options.
• Grand models provide higher capacity and twin pumps as standard.
• Regular models can be specified with flat or tapered base options where applicable.

Vortech™ Poly Pump chambers range from 0.6 m to 1.8 m in diameter and up to 4.2 m deep. Where greater depth, capacity or alternative construction is needed, Dutypoint can advise whether a GRP chamber or a bespoke pump station would be more suitable.

4. Drainage connections

Why it matters

Drainage connection details determine whether the selected chamber can accept the incoming gravity pipe and whether the pump can discharge wastewater effectively. If the inlet position is not coordinated with the active storage zones, untreated effluent may back up into the gravity lines during high-level conditions.

How to confirm drainage connections

• Inlet invert level: Check the incoming gravity pipe depth to ensure at least 600 mm clearance above the chamber base.
• Incoming pipe diameter: Confirm the drain diameter from the layout to select the correct site-drilled wall seal.
• Rising main specs: Verify discharge pipe size, route length, and location to calculate friction losses and pump duty.

Do inlet positions need to be specified before manufacture?

No. Vortech™ Poly Pump Station inlet connections can be drilled on site at the required depth and orientation. On-site drilling gives contractors more flexibility at the installation stage, helping accommodate final pipe alignment, site-level variations and minor layout changes.

5. Installation requirements

Why it matters

Polyethylene is lightweight, so an empty chamber experiences buoyancy (hydrostatic uplift) and can float if it isn’t properly ballasted. The strengthening ribs interlock with the concrete surround to resist this. Get the ground conditions or the surroundings wrong, and the chamber can move.

How Vortech™ addresses this

Vortech™ Poly tanks feature external strengthening ribs that lock into a poured concrete surround to counteract flotation. Standard covers included in the range vary by size:

• 450 mm composite (3.5 T) for Compact
• 600 x 600 mm galvanised steel (10 T) for Regular
• 800 x 1,000 mm galvanised steel (10 T) for Grand models

Driveway installations must utilise a reinforced concrete slab at least 200 mm thick to spread vehicle loads. Where the water table is above the base, the tank will need bedding on cement slurry to prevent buckling. During the pour, the internal water level will need to stay above the external concrete level to resist buoyancy. Local regulations and site conditions will determine whether to continue with concrete or transition to granular backfill once Building Inspector approval is secured.

6. Maintenance access

Why it matters

Active sewage chambers contain hazardous, toxic, and potentially explosive atmospheres, therefore minimising confined-space entry is a critical safety mandate. Confirming access requirements allows safe, long-term servicing and pump extraction while actively mitigating health and safety hazards.

How Vortech™ addresses this

The mechanical layout of the Vortech™ system is explicitly designed to facilitate pump removal and component servicing from the surface. All Regular and Grand models are supplied as standard with an auto-coupling guide-rail system. This allows maintenance personnel to hoist the pumps vertically using lifting chains and suitable equipment without ever entering the chamber.

Do rising mains need air valves or washout chambers?

Yes, if the rising main route is long or has an uneven longitudinal profile. These components are essential for pipeline maintenance and directly alter the friction head calculations required for pump selection. Note that they are external infrastructure assets that must be designed by the site engineer; they are not included in the packaged pump station supply.

7. Control and monitoring

Why it matters

Pump station monitoring and maintenance are dependent on control logic. If a primary duty pump fails or an extreme inflow event overwhelms capacity without a proper control strategy or high-level alarm, the system cannot warn operators or automatically rotate to a standby pump, leading to overflow.

What controls does a Vortech™ station include?

Every system includes automated level controls and a high-level alarm as standard. Level sensing and float switches are standard; levels are managed via sensors that trigger specific pump-off, pump-on, and high-level alert thresholds.

Vortech™ model-specific control features:

• Compact models: Equipped with a battery-powered high-level alarm featuring visual/audible warnings, plus test and mute buttons.
• Regular and Grand models: Industrial control panel with a Hand/Off/Auto (HOA) selector, heavy-duty enclosure, mains-interlocking isolator, adjustable overloads, indicator lamps, and volt-free contacts for BMS connection.
• Optional upgrades: A battery backup control system is available for critical applications.

8. Documentation

Why it matters

A complete documentation pack evidences that the station has been specified, installed, commissioned and maintained correctly. It also gives the design team what they need to coordinate the excavation, invert levels and access against the rest of the drainage and site services. Missing documentation can risk installation, handover and adoption delays.

Where can I find technical information for Vortech™ Poly Pump Station?

Datasheets, DWG files, the O&M manual, pump curves and the technical brochure are available in the Vortech™ Poly Pump Station resource library.

Download Vortech™ Specification Guide

When to Involve Dutypoint

Early involvement is recommended when the pump station requirements are not fully confirmed, or where site conditions could affect chamber selection, pump duty, installation or long-term maintenance. Bringing Dutypoint into the specification process before procurement can help reduce redesigns, delays and uncertainty.

If you are unsure of the following, contact Dutypoint:

• Flow rate, total head or wastewater type is still being confirmed.
• Storage volume, inlet invert level or chamber depth is uncertain.
• Groundwater, buoyancy or trafficked loading may affect installation.
• The rising main is long, uneven or hydraulically complex.
• The project may need twin pumps, alarms, telemetry or BMS integration.
• Access for installation or maintenance is restricted.
• The required depth or capacity may sit outside the standard Vortech™ Poly range.
• Adoption, authority approval or project-specific documentation is required.

What to provide with an enquiry

To support accurate pump station selection, provide as much of the following information as possible:

• Site address and project type.
• Design flow rate and total dynamic head, where known.
• Type of wastewater being pumped.
• Incoming pipe diameter and inlet invert level.
• Rising main diameter, length, route and discharge point.
• Required storage volume or connected appliances.
• Proposed chamber location and available excavation depth.
• Groundwater, surface loading and access constraints.
• Control, alarm or monitoring requirements.
• Any relevant drawings, drainage layouts or authority requirements.

Need support with specification?

Dutypoint can help review the available project information, confirm whether the Vortech™ Poly range is suitable and advise on the right pump, chamber, controls and documentation for the application.

Submit a Project Enquiry