Powertank COMPACT
Powertank COMPACT 125L Fixed Speed – 2600070
- Established 1975
- Trusted by thousands of customers
The Powertank COMPACT 125L Fixed Speed Water Booster is a complete packaged boosting system for smaller properties suffering low mains pressure where floor space is at a premium. A 125 litre Powertank pairs with a 0.55 kW pump delivering 35 L/min at up to 3 bar.
An electronic pressure switch starts and stops the pump automatically when system pressure drops, delivering up to 35 L/min at 3 bar.
Delivered as a single ready-to-install unit with tank, pump, controller and removable unions. Made in Britain with typical 5–7 day delivery.
More about this product
The Powertank COMPACT 125L Fixed Speed is a packaged, all-in-one water boosting system combining a 125 litre storage tank, pump, controller and removable unions in a single unit ready to install. It is the workhorse configuration in the Compact range.
About the Powertank Compact Range
The Powertank Compact is purpose-built for smaller properties suffering low mains pressure where floor space is at a premium. Its small footprint fits comfortably under a kitchen counter or in an airing cupboard, while still delivering meaningful improvements in pressure and flow.
About This Build
This fixed speed build uses a robust 0.55 kW single-phase pump controlled by an electronic pressure switch that starts the pump when demand is detected and stops it once pressure is restored. It is a reliable, lower-cost option where consistent moderate flow is required.
Best For
Specifications
| Tank Capacity | 125 litres |
| Pump Power | 0.55 kW / 0.75 HP |
| Maximum Flow | 35 L/min |
| Working Pressure | Up to 3 bar |
| Power Supply | Single-phase 230 V (110 V available on fixed speed builds to order) |
| Dimensions (H × L × W) | 850 × 560 × 490 mm |
| Stock Code | 2600070 |
Backflow Protection & Air Gap
This unit is fitted as standard with a Type AB air gap for Fluid Category 5 backflow protection. Fluid Category 4 covers commercial heating systems, bottle washing, dishwashing, brewery and distillation applications; Fluid Category 5 is required for higher-risk settings such as food preparation, abattoirs, surgeries and laboratories.
Recommended Add-Ons
FAQs
Connections & Size
- Inlet: ½” BSP
- Outlet: 1” BSP
- Overflow: 1 ½”
- Drain Off: 1” BSP
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Fixed Speed Option
- 240 volt, 50Hz
- Presflo 1.5 supplied with 2ltr pressure vessel
- 3.4 amp
- 2mtr x 1mm² 3 core fitted with 5 amp fuse main plug
- 27kg
- 1ltr = 1 kg plus weight of empty tank
- 190mm
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 Powertank COMPACT 125L Fixed Speed – 2600070. 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 mains pressure boosting system?
A mains pressure boosting system increases the pressure and flow of water from the incoming mains supply into a property. It typically combines a pump and a storage or expansion tank, drawing water from the mains and delivering it to taps, showers and appliances at a stronger, more consistent pressure. They are used where the incoming mains is too weak to serve modern outlets reliably.
When do I need a mains booster pump?
You normally need a mains booster if static mains pressure is below 1.5 to 2 bar, if showers run weakly when other taps are open, or if combi boilers struggle to deliver hot water. Anglian Pumping recommends checking static pressure at the stop tap before specifying a system, then choosing a model rated for the number of bathrooms and outlets in the property.
What size mains booster do I need for my home?
Sizing depends on the number of bathrooms, the type of fittings and the static mains pressure. As a guide, a 1 to 2 bathroom property with combi boiler or single shower often needs 1.6 to 3 bar boost. A 2 to 3 bathroom property typically needs 3 to 4.5 bar with an integral break tank. Larger homes need a tank-and-pump system such as the DAB Esybox with Esytank or a Powertank set.
What is a water booster pump?
A water booster pump increases the pressure of an existing water supply to give stronger flow at taps, showers and appliances. It can be a small inline pump fitted to the incoming mains, or a larger pump and tank set that draws from a break tank to feed the whole house. Boosters do not create water – they raise the pressure of the water already coming in.
What is the difference between an inline booster and a tank-and-pump booster?
An inline booster connects straight onto the incoming mains and is limited to 12 litres per minute under UK water regulations – examples include the Salamander HomeBoost and WaterBoost WB-Compact. A tank-and-pump booster, such as the Grundfos Home Booster or DAB Esybox with Esytank, draws from a break tank and can deliver much higher flow rates for larger homes with multiple bathrooms.
What is a variable speed booster pump?
A variable speed booster uses an inverter to adjust pump speed in real time to match demand. It maintains constant pressure as outlets open and close, runs more quietly than a fixed-speed pump and typically saves up to 50 per cent of the energy a fixed-speed equivalent would use. The DAB Esybox, DAB Esybox Mini 3 and Grundfos Scala2 are common variable speed examples.