Pressurisation Units

Pressurisation Units

Pumps UK LTD's pressurisation units are designed to replace water that has been lost through system leakage and to maintain the system design fill pressure in sealed heating and chilled water systems. Most modern boiler and air conditioning systems are sealed and require a device to maintain the system pressure and give warnings when the fill pressure is low or when the water has over expanded causing a high pressure.

All sealed heating systems have to have an interlock circuit so that the boilers are cut out if the unit is at fault. Incorrect calibration of the unit settings or pre charging of the expansion vessels will cause the system to malfunction. Pumps UK Ltd are able to size, supply and commission units to suit most applications.

If you are not sure what unit you require please contact the office or fill out our online quotation form.


  • Armstrong 3750 Units

  • PUK-Autopress

  • Lowara Presfix Units

  • Flamco Microfill Units


14 Item(s)

  1. Osip PBC 50 - Peripheral pump

    Excl. Tax: £165.00 Incl. Tax: £198.00

    PBC 50 - Brass Electric peripheral pump, made to develop high pressure against limited flow rate and low power consumption. This pumps is entirely made of brass in order to avoid any problem of blocking and seizure normally encountered with pumps made of cast iron. This is particularly suitable for sanitary and industrial applications.

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  2. PUK-Autopress 1LV Pressurisation Unit

    Excl. Tax: £625.00 Incl. Tax: £750.00
    • Max. Fill Pressure - 3Bar.
    • 3 pressure switches
    • Isolating Valve (between tank and pump)
    • Non-return valve
    • Corrosion resistant brass/copper/plastic pipework
    • Built in our warehouse so lead time approx. 1 week.

    Please see below for more information

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  3. Flexfiller Mini

    Starting at: Excl. Tax: £722.00 Incl. Tax: £866.40

    Flamco Flexfiller mini - Compact, totally enclosed units with user-friendly microprocessor for use with Flexcon expansion vessels in order to provide a minimum system pressure requirement. The processor allows for low and high pressure monitoring as well as system diagnostic tools. Learn More
  4. PUK-Autopress 1LEV Pressurisation Unit

    Excl. Tax: £775.00 Incl. Tax: £930.00
    • Operating Pressure Range - 0.7 - 3.0 bar
    • Maximum Flow Rate - 6 litres/min
    • Tank Capacity (actual) - 7.6 litres
    • Weight : 21 kg (empty) 29 kg (full)
    • Built in our warehouse so lead time approx. 1 week.

    The unit can also be supplied with expansion vessels which can be sized by our sales team before ordering.

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  5. Flexfiller MiDi Digital

    Starting at: Excl. Tax: £928.00 Incl. Tax: £1,113.60

    Flamco Flexfiller Midi pressurisation units. Compact, totally enclosed units with user-friendly microprocessor for use with Flexcon expansion vessels in order to provide a minimum system pressure requirement. The processor allows for low and high pressure monitoring as well as system diagnostic tools. Learn More
  6. PUK-Autopress 1LC Pressurisation Unit

    Excl. Tax: £946.00 Incl. Tax: £1,135.20
    • Low pressure unit
    • Single pump
    • Max fill pressure: 2.8bar
    • Power: 0.37kW motor
    • Overall weight: 36kg
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  7. PUK-Autopress 1HC Pressurisation Unit

    Excl. Tax: £983.00 Incl. Tax: £1,179.60
    • High Pressure
    • Single Pump
    • Floor mounted
    • Electronic control 
    • Max fill pressure: 5.5bar
    • Power: 0.37kW motor
    • Overall weight: 37kg
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  8. PUK-Autopress 2LEV Pressurisation Unit

    Excl. Tax: £995.00 Incl. Tax: £1,194.00
    • Operating Pressure Range - 0.7 - 3.0 bar
    • Maximum Flow Rate - 6 litres/min
    • Tank Capacity (actual) - 7.6 litres
    • Weight 27 kg (empty) 35 kg (full)
    • Built in our warehouse so lead time approx. 1 week.

    The unit can also be supplied with expansion vessels which can be sized by our sales team before ordering.

    Our Service Department can also attend site to commission the new equipment.

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  9. PUK-Autopress 2LC Pressurisation Unit

    Excl. Tax: £1,071.00 Incl. Tax: £1,285.20
    • Low pressure unit
    • Twin pump
    • Max Fill Pressure: 2.8bar
    • Weight: 45kg
    • Power: 0.37kW motor
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  10. PUK-Autopress 2HC Pressurisation Unit

    Excl. Tax: £1,151.00 Incl. Tax: £1,381.20
    • High pressure unit
    • Twin pump
    • Floor mounted
    • Max fill pressure: 5.5bar
    • Power: 0.37kW motor
    • Overall weight: 46kg
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  11. Lowara Presfix Beta 228 Dual System

    Excl. Tax: £1,658.50 Incl. Tax: £1,990.20
    • Presfix Beta enclosed dual system microprocessor set
    • Part no: UKBETA200DS28/A
    • Family code: 5G
    • Twin pump
    • Max F/P 2.8 bar
    • Weight: 62kg
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  12. Lowara Presfix Beta 255 Dual System

    Excl. Tax: £1,741.50 Incl. Tax: £2,089.80
    • Presfix Beta enclosed dual system microprocessor set
    • Part no: UKBETA200DS55/A
    • Family code: 5G
    • Twin pump
    • Max F/P 5.5 bar
    • Weight: 64kg
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  13. Lowara Presfix Beta 280 Dual System

    Excl. Tax: £2,075.00 Incl. Tax: £2,490.00
    • Presfix Beta enclosed dual system microprocessor set
    • Part no: UKBETA200DS80/A
    • Family code: 5G
    • Twin pump
    • Max F/P 8.0 bar
    • Weight: 75kg
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  14. Armstrong 3750-2VM-S Pulpress Enhanced + VFC

    Excl. Tax: £4,660.00 Incl. Tax: £5,592.00
    • Twin pump / Single system
    • Enhanced model with VFC
    • Motor: 0.5kW
    • RPM: 2900
    • Phase: Single phase
    • Starting Current: 8.7A
    • Full Load Current: 2.9A
    • MWSP: 5.5 Bar
    • Dimensions: w:560 h:902 d:557
    • Water Inlet Conn: ½" BSPM
    • System Conn: ½" BSPF
    • Weight: 55kg
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14 Item(s)