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    High Capacity Thompson Filters, 4" Flanged Ports, 350 Max GPM

    These unique Thompson Strainer Systems feature a conical screen element that gives the filter a self-cleansing ability and the advantage of large screen area providing high capacities with low pressure loss. Debris is collected in a chamber below the screen for periodic flushing through a fitting in the bottom of the filter.

    4" Models Feature:

    • 304 Stainless Steel Housing (316 Stainless Screens)
    • Max 350 GPM
    • Pressures to 150 PSI
    • 367 Sq. In. Screen Surface Area
    • 2" NPT Debris Flush Port
    • Filters include two 1/4" gauge ports.
    • Bolt on Cover.
    • NPT threaded inlet/outlet ports.
    • Uses a PVC Elbow and Riser Pipe Assembly



    Note: Side Flush Models are available as a Special Order.
    Filters priced above have screens installed.

    0Types Available
    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/16" Perf Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/16" Perf Screen, Bottom Cleanout
    Thompson Filter, 4IN, 1/16IN Perforated Screen, Bolted Lid, Bottom Cleanout
    SKU: DUMLI4B-1/16
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/8" Perf Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/8" Perf Screen, Bottom Cleanout
    Thompson Filter, 4in, 1/8IN Perforated Screen, Bolted Lid, Bottom Cleanout
    SKU: DUMLI4B-1/8
    $3,550.00 / EA
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 120 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 120 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 120 Mesh Screen, Bottom Cleanout
    SKU: DUMLI4B-120
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 40 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 40 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 40 Mesh Screen, Bottom Cleanout
    SKU: DUMLI4B-40
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/4" Perf Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 1/4" Perf Screen, Bottom Cleanout
    Thompson Filter, 4IN, 1/4IN Perf Screen, Bottom Cleanout
    SKU: DUMLI4B-1/4
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 16 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 16 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 16 Mesh Screen, Bottom Cleanout
    SKU: DUMLI4B-16
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 80 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 80 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN Flanged, 80 Mesh Screen, 2IN MPT Bottom Cleanout
    SKU: DUMLI4B-80
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 100 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 100 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 100 Mesh Screen, Bottom Cleanout
    SKU: DUMLI4B-100
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 30 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 30 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 30 Mesh Screen, Bottom Cleanout
    SKU: DUMLI4B-30
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    Picture of Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 50 Mesh Screen, Bottom Cleanout
    Thompson Filter/Strainer, 4" Flanged Inlet/Outlet Ports, 50 Mesh Screen, Bottom Cleanout
    Thompson Filter, 4IN, 50 Mesh Screen, Bottom Cleanout
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    Additional Information

    The Thompson Filter's internal flow patterns are responsible for making our unique product so effective. As water flows up through the filter housing and deflects off the surface of the conical shaped filter screen, sediment is effectively forced back down, away from the screen, into the large debris reservoir. The sediment is then easily removed through the flush port. Effective separation of the water and the sediment is achieved while minimizing debris contact with the screen.

    The Filter/Strainer vessel is purged while online and in operation. By opening a valve on the flush port, all debris in the lower reservoir is purged from the vessel, as shown. Backflushing or taking the unit off-line is not required to perform this flushing procedure.