Twin pump control panel
Dual pump control panels
Two pumps, one panel: duty/assist with automatic changeover, a high level alarm and volt-free outputs. Built in Stoke-on-Trent, standard panels next day from stock.
From £1,245 + VAT · next day from stock
Next day from stock
Standard dual pump DOL panels up to 18A are on the shelf. Order by 2pm.
Duty/assist and changeover
The pumps swap duty every cycle, and the second joins in on high inflow.
Lifetime relay warranty
The alternating relay, the part that fails most on older panels, is warranted for life.
Volt-free outputs
Pump running, pump fault and high level, ready for a BMS or telemetry.
A dual pump control panel (also called a twin pump or duplex panel) runs two pumps from one set of level controls. On a G&G panel the pumps work duty/assist with automatic duty changeover: one pump does the normal work, the second joins in when the inflow is more than one pump can handle, and the two swap roles every cycle so they wear evenly. If either pump trips, the other carries on. Standard dual pump wastewater panels are on the shelf for next-day delivery.
How a dual pump control panel works
A standard twin pump station has four float switches: stop, start, assist and high level. With both pumps switched to auto, this is what happens as the chamber fills and empties.
- Start: the level rises to the start float. The duty pump starts and its green running lamp comes on.
- Assist: if the inflow is more than one pump can keep up with, the level reaches the assist float and the second pump starts as well. Both run together.
- High level: if the level still rises, the high level float raises the alarm: the amber high level lamp, the sounder and the high level volt-free contact. The mute button silences the sounder.
- Stop: when the level falls to the stop float, all pumps stop.
- Next cycle: the alternating relay swaps the duty, so the other pump starts first. Both pumps share the work and neither seizes from standing still.
- Pump trip: if a pump trips, its red fault lamp comes on and the panel carries on with the other pump until the trip is reset.
Where the floats go
Stop is the lowest float, set so the pumps stop before they draw air. Start is the one that sets how often the pumps cycle: the gap between stop and start must be big enough that the pumps do not exceed their starts per hour at normal inflow. Assist sits 150 to 300mm above start, so the second pump only runs when the duty pump genuinely is not coping. High level goes above assist and below the incoming pipe, so the alarm sounds before the sewer backs up.
A dual pump panel can run on three floats (stop, start and high level, with high level bringing in the second pump), but you lose the early warning that the duty pump is struggling. Where floats foul in fat or rags, Basix View replaces them with a radar or hydrostatic level sensor and set points on a touchscreen.
What is on the door
Everything an engineer needs to see without opening the panel, laid out the same way on every G&G dual pump panel.
- Power on lamp (white): the panel has a supply.
- High level lamp (amber) and an alarm sounder, with a mute alarm button.
- Pump 1 running and pump 2 running lamps (green).
- Pump 1 fault and pump 2 fault lamps (red): the overload or protection on that pump has tripped.
- A hand/off/auto switch for each pump. Auto for normal running; hand to test a pump; off to take it out of service. Leave both in auto, or the changeover cannot work.
- A door-interlocked isolator, so the door cannot be opened with the panel live.
Volt-free connections and outputs
Every dual pump panel has volt-free output relays for pump running, pump fault and high level alarm, wired to labelled terminals for a BMS, a client's telemetry outstation or a Telemetrix add-on box. There are also supplies for two remote high level beacons.
On site the panel needs three groups of connections: the incoming supply to the isolator, each pump cable to its own contactor and overload (pump 1 to pump 1's terminals), and the floats to the control terminals marked stop, start, assist and high level. Seal leak and thermal contacts, where the pumps have them, go to their own control terminals. The wiring diagram for the panel is in the door.
Inside the panel
A contactor and overload for each pump, MCBs, a 24V AC control circuit, and an alternating relay to share the duty. The alternating relay is the part that fails most on older panels: ours is a universal stepping relay, which cannot burn out the way the old type does, and it carries a lifetime warranty. Schneider enclosure and switchgear, a Socomec isolator with a shaft guide, and WAGO lever terminals throughout.
Which dual pump panel?
All four are dual pump panels with the same control logic; they differ in how the level is sensed and whether the station is monitored remotely.
- Basix: float switches, lamps and switches on the door. The standard panel, on the shelf.
- Basix View: a touchscreen and a 4-20mA input for a radar or hydrostatic level sensor, with set points in place of floats.
- Telemetrix: Basix with remote monitoring built in, and a text or email when a pump trips or the level is high.
- Telemetrix View: Telemetrix with the touchscreen and level sensor input.
- Single phase 230V or three phase 400V; direct-on-line to 24A, star/delta to 55A, or inverter driven.
Buy a dual pump panel online
Every standard dual pump panel is priced in the shop, by supply and motor current, with stock shown.
Shop dual pump control panelsFurther reading
Specification
| Pumps | 2, duty/assist with automatic duty changeover |
|---|---|
| Starting | Direct-on-line as standard; star/delta, capacitor start and inverter optional |
| Current rating | 1 to 18A per pump from stock; up to 24A DOL and 55A star/delta to order |
| Supply | 1ph 230V or 3ph 400V, specify on order |
| Level control | 4 float switches (stop, start, assist, high level); 4-20mA sensor on View panels |
| Door | Power on, high level, pump running and pump fault lamps; hand/off/auto per pump; sounder and mute |
| Outputs | Volt-free pump running, pump fault and high level; supplies for two beacons |
| Control circuit | 24V AC |
| Enclosure | Powder-coated mild steel, IP55; GRP polyester or stainless steel optional |
| Dimensions | 500 x 400 x 200mm (DOL), plus door items |
| Warranty | 12 months; lifetime on the alternating relay |
Product codes: WS2xxS (1ph dual), WT2xxS (3ph dual), WD2xxS (star/delta dual), WR2xxS (capacitor). Full code tables are on the pump panels page.
Every panel ships with its wiring diagram, a test certificate and a 12-month warranty.
Options
Motor and protection
- Seal leak relay and lamp
- Over temperature
- Run and start capacitors
- Surge protection
Controls and indication
- Ammeter for each pump
- Hours run for each pump
- Duty changeover on timer
- Spring-back switches
Alarms
- High level beacon
- Battery backup alarm
- GSM alert
Enclosure and power
- GRP kiosk
- Panel heater and thermostat
- Generator inlet
- 230V socket
Options are priced on your quote, itemised, so you can see what each one adds.
Price and lead time
From £1,245 + VAT for a dual pump DOL panel up to 18A. Star/delta and higher currents are in the table below; options are priced on your quote.
List price. Trade and volume discounts available.
Next working day from stock (order by 2pm) for standard dual pump DOL panels, subject to availability. Panels with options are typically 10 to 20 working days.
| Starting method | FLC per pump | Single pump | Dual pump | Triple pump |
|---|---|---|---|---|
| Direct-on-line | up to 18A | £906.40 | £1,244.54 | £2,092.65 |
| Direct-on-line | 18 to 24A | £950.02 | £1,314.56 | £2,403.94 |
| Star/delta | up to 22A | £1,046.04 | £1,864.51 | £3,044.94 |
| Star/delta | up to 31A | £1,124.79 | £2,107.57 | £3,447.15 |
| Star/delta | up to 41A | £1,258.20 | £2,342.26 | £3,636.93 |
| Star/delta | up to 55A | £1,517.09 | £2,717.27 | £4,775.60 |
Standard panels include
- • Single phase or three phase (specify when ordering)
- • Steel enclosure, IP55
- • Isolator, MCBs, contactors, overloads and control circuit including duty changeover
- • Hand/off/auto switches
- • Lamps for run, trip, high level and power on
- • High level alarm sounder and mute button
- • 24V AC output for high level beacon
- • Volt-free contacts
- • WAGO screwless terminals
All prices shown are list prices. Trade, account and volume discounts are available: ask when you request a quote. Prices exclude VAT and delivery. Issued 1 May 2026. Specifications are provisional pending sign-off of a wiring layout. Errors and omissions excepted.
Frequently asked questions
Jobs we have done with this range
All case studies →
Pump service contractor, West Sussex
Three Telemetrix panels for West Sussex County Council's landfill pumping stations
The contractor look after the pumping infrastructure at West Sussex County Council's landfill sites under a long-term asset management contract. They fitted three wastewater high-level Telemetrix panels so the council gets live status and alerts, and maintenance can be preventative rather than reactive.
Read the case study
Pump specialist, Oxfordshire
A star/delta Telemetrix panel, turned round quickly for an Oxford campus
A pumping station on a university campus in Oxford needed its control panel replaced, along with the pump and the float switches. The pump specialist specified a bespoke star/delta Telemetrix panel with remote monitoring, and the whole job, panel, floats and a new 6kW Sulzer pump, was done in a morning.
Read the case study
Pumping station specialist, South East
Telemetrix as standard across a pump service contractor's stations
The contractor refurbishes and maintains pumping stations across the South East, and now fit Telemetrix as a matter of course: three side by side at one site, four in a single week at others, six and counting. They install them and then monitor them for their clients.
Read the case studyRelated panels
Wastewater control panel
Basix
The standard float-switch pump panel: industrial components, a lifetime warranty on the stepping relay, and next-day delivery from stock.
From £906 + VAT for a single pump DOL panel and £1,245 + VAT for a twin pump DOL panel.
Wastewater control panel with HMI
Basix View
Basix with a built-in touchscreen and a 4-20mA input, so it runs from a radar or hydrostatic sensor and shows the level on the door.
Basix panel price plus the HMI for 4-20mA input (£1,752 + VAT) and your chosen sensor.
Wastewater control panel with remote monitoring
Telemetrix
Industrial switchgear plus cloud connectivity over 4G, WiFi or Ethernet. Email alerts free for life; texts 10p each.
£1,798 + VAT for the dual pump DOL panel (up to 18A) and £4,300 + VAT for star/delta (up to 41A).
Request a quote for Dual pump control panels
Tell us the pumps or points, the supply, the site and anything the panel must comply with. Attach a spec or drawing if you have one.
- Wiring diagram, test certificate and 12-month warranty with every panel
- Built to BS EN 61439 and BS EN 60204-1 in Stoke-on-Trent
- We reply during working hours, usually the same working day
Got a project, or just need a quick answer?
Tell us what the panel has to do and we will come back with a price and a lead time. Existing accounts: reorders and spares go through the same form.