Collection: Diaphragm Pumps

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Pressure Washing Supplies UK is a UK supplier of pressure washing equipment, pumps, hose reels, hoses, valves, fittings and replacement parts for professional, agricultural and industrial use.

  • Flojet Versijet Series 4-Chamber Pump - 12V
    Flojet Versijet Series 4-Chamber Pump - 12V
    Part No: Q351F-118S-2P
    • 4.1 Bar switch setting
    • 13.2 Lpm max flow
    • Internal bypass
    • 12 Volt DC, 12 Amps
    • Santoprene diaphragm
    • EPDM check valve
    • Quick Connect ports w/ 1/2" hose barbs
    Regular price £181.46 GBP
    Regular price Sale price £181.46 GBP
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  • Flojet 5100 Series Air Driven Pump
    Flojet 5100 Series Air Driven Pump
    Part No: N5100-040
    • 5.5 Bar max pressure
    • 9.5 Lpm max flow
    • Santoprene diaphragm & check valve
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Acetal coploymer pump housing
    • 5.5 Bar max air pressure
    Regular price £91.53 GBP
    Regular price Sale price £91.53 GBP
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  • Flojet 5100 Series Air Driven Pump
    Flojet 5100 Series Air Driven Pump
    Part No: N5100-020
    • 5.5 Bar max pressure
    • 9.5 Lpm max flow
    • Viton diaphragm & check valve
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Acetal coploymer pump housing
    • 5.5 Bar max air pressure
    Regular price £151.68 GBP
    Regular price Sale price £151.68 GBP
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  • Flojet G70C Series Air Driven Pump
    Flojet G70C Series Air Driven Pump
    Part No: G70K202A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Kalrez diaphragm
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • ATEX approved
    • Polypropylene pump housing
    Regular price £341.85 GBP
    Regular price Sale price £341.85 GBP
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  • Flojet G57C Series Air Driven Pump
    Flojet G57C Series Air Driven Pump
    Part No: G57C202A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Kalrez diaphragm
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £272.28 GBP
    Regular price Sale price £272.28 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G575215A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Santoprene diaphragm
    • 1/2" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £167.49 GBP
    Regular price Sale price £167.49 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G575205A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Santoprene diaphragm
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £167.49 GBP
    Regular price Sale price £167.49 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G575005A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Santoprene diaphragm
    • Not supplied with fluid ports
    • Not supplied with air port
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £189.01 GBP
    Regular price Sale price £189.01 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G573225A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Viton diaphragm
    • 3/4" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £283.52 GBP
    Regular price Sale price £283.52 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G573215A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Viton diaphragm
    • 1/2" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £249.69 GBP
    Regular price Sale price £249.69 GBP
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  • Flojet G57 Series Air Driven Pump
    Flojet G57 Series Air Driven Pump
    Part No: G573205A
    • 6.9 Bar max pressure
    • 18.9 Lpm max flow
    • Viton diaphragm
    • 3/8" hose barb fluid ports
    • 1/4" hose barb air inlet
    • Polypropylene pump housing
    • 6.9 Bar max air pressure
    Regular price £239.28 GBP
    Regular price Sale price £239.28 GBP
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  • Comet APS71 Petrol Engine Pump Unit
    Comet APS71 Petrol Engine Pump Unit
    Part No: EPU7150PH
    • 50 Bar
    • 71 Lpm
    • Honda GX390 with oil alert
    • GCP3V pressure regulator
    • NBR diaphragms
    • 35mm hose barb inlet
    • 3x 10mm hose barb outlets
    Regular price £1,588.85 GBP
    Regular price Sale price £1,588.85 GBP
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  • Comet P48 Petrol Engine Pump Unit
    Comet P48 Petrol Engine Pump Unit
    Part No: EPU6430PH
    • 30 Bar
    • 64 Lpm
    • Honda GX160 with oil alert
    • GCP3V pressure regulator
    • NBR diaphragms
    • 26mm hose barb inlet
    • 3x 10mm hose barb outlets
    Regular price £1,043.99 GBP
    Regular price Sale price £1,043.99 GBP
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  • Comet APS41 Petrol Engine Pump Unit
    Comet APS41 Petrol Engine Pump Unit
    Part No: EPU4140PH
    • 40 Bar
    • 41 Lpm
    • Honda GX160 with oil alert
    • Gemini pressure regulator
    • NBR diaphragms
    • 25mm hose barb inlet
    • 2x 10mm hose barb outlets
    Regular price £915.00 GBP
    Regular price Sale price £915.00 GBP
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  • Comet P40/20 Petrol Engine Pump Unit
    Comet P40/20 Petrol Engine Pump Unit
    Part No: EPU4020PH
    • 20 Bar
    • 40 Lpm
    • Honda GX120 with oil alert
    • Integrated pressure regulator
    • Viton diaphragms
    • Polypropylene & st.steel construction
    • 30mm hose barb inlet
    Regular price £1,127.78 GBP
    Regular price Sale price £1,127.78 GBP
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  • Comet MP30 Petrol Engine Pump Unit
    Comet MP30 Petrol Engine Pump Unit
    Part No: EPU2930PH
    • 30 Bar
    • 29 Lpm
    • Honda GX120 with oil alert
    • Sirius pressure regulator
    • NBR diaphragms
    • 23mm hose barb inlet
    • 2x 10mm hose barb outlets
    Regular price £913.74 GBP
    Regular price Sale price £913.74 GBP
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  • Comet BPX25 Petrol Engine Pump Unit
    Comet BPX25 Petrol Engine Pump Unit
    Part No: EPU2820PHR
    • 20 Bar
    • 28 Lpm
    • Honda GX120 with oil alert
    • Genius pressure regulator
    • NBR diaphragms - Nylon pump body
    • 25mm hose barb inlet
    • 10mm hose barb outlet
    Regular price £761.71 GBP
    Regular price Sale price £761.71 GBP
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  • Comet BPX25 Petrol Engine Pump Unit
    Comet BPX25 Petrol Engine Pump Unit
    Part No: EPU2815PHR
    • 15 Bar
    • 28 Lpm
    • Honda GX120 with oil alert
    • Genius pressure regulator
    • NBR diaphragms - PP pump body
    • 25mm hose barb inlet
    • 10mm hose barb outlet
    Regular price £791.04 GBP
    Regular price Sale price £791.04 GBP
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  • Comet APS31 Petrol Engine Pump Unit
    Comet APS31 Petrol Engine Pump Unit
    Part No: EPU2540PH
    • 40 Bar
    • 25 Lpm
    • Honda GX120 with oil alert
    • Gemini pressure regulator
    • NBR diaphragms
    • 25mm hose barb inlet
    • 2x 10mm hose barb outlets
    Regular price £930.61 GBP
    Regular price Sale price £930.61 GBP
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