Stuart Turner Digital Pressurisation Unit’s
Stuart Turner Pressurisation Unit SPU 130 MINI – 46719
- Established 1975
- Trusted by thousands of customers
The Stuart Turner SPU 130 MINI is a compact, wall-mounted digital pressurisation unit designed to maintain pressure in sealed heating, chilled water, refrigeration, and industrial cooling systems. Suitable for systems up to 6,000 litres, it automatically tops up system pressure from the mains supply whenever pressure drops below the set point — preventing low pressure faults, airlocks, and boiler lockouts without manual intervention.
Features a digital LED display and high flow WRAS-approved fill valve. Cold fill pressure set at 3.0 bar. Category 5 backflow protection via Type AB air gap and weir overflow ensures water authority compliance. The 2-litre internal break tank provides a buffer between the mains and the system. Outlet is configurable for left or right connection, with a flexible hose supplied. Exceptionally easy to install and commission.
Patent protected design. 2-year guarantee. For an alternative with MODBUS RTU connectivity, flood protection alarms, and onscreen service reminder, see the Flamco Flexfiller Minipress 130.
Patent protected
Digital LED display
Configurable L/R outlet
Hose supplied
Wall mounted
More about this product
The Stuart Turner SPU 130 MINI is a compact, wall-mounted digital pressurisation unit for sealed heating, chilled water, refrigeration, and industrial cooling systems. It monitors system pressure via a digital control system and automatically tops up from the mains supply whenever pressure drops below the set point — preventing the low pressure faults, pump cavitation, and boiler lockouts that occur when sealed systems lose pressure over time.
Suitable for systems up to 6,000 litres, the unit features a high flow WRAS-approved fill valve and a 2-litre internal break tank. Category 5 backflow protection is provided via a Type AB air gap and weir overflow, meeting water authority requirements. The cold fill pressure is set at 3.0 bar. The outlet is configurable for left or right connection, and a flexible hose is supplied with the unit for straightforward installation.
The SPU 130 MINI is a patent protected design, supplied with a 2-year guarantee. Stuart Turner units are exceptionally easy to install and commission, housed in a compact and robust enclosure suited to plant room and commercial environments.
What is a pressurisation unit and what does it do?
What does Category 5 backflow protection mean?
Is the SPU 130 MINI suitable for chilled water and refrigeration systems?
How does the SPU 130 MINI compare to the Flamco Minipress 130?
Is a higher capacity version available?
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Data Sheet PDFDownload
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Brochure PDFDownload
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 Stuart Turner Pressurisation Unit SPU 130 MINI – 46719. 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.