Check-Flex G4-W Duckbill Check Valve

Wall mounting duckbill valve with level invert

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Vulcanised and reinforced like a tyre for durability

Flexible and wide seal

Flange drilling to match any mating flange

Sizes to fit all pipes

Encapsulated metal with strong single piece design for marine diffuser applications

Nominal Pipe Size

Check-Flex G4-W0100
ID: 104
L: 276
H2: 225
W: 200 H: 200
Anchors: 4x M12
Check-Flex G4-W0150
ID: 154
L: 326
H2: 380
W: 250 H: 250
Anchors: 4x M12
Check-Flex G4-W0200
ID: 205
L: 359
H2: 455
W: 300 H: 300
Anchors: 4x M12
Check-Flex G4-W0225
ID: 231
L: 421
H2: 483
W: 350 H: 350
Anchors: 4x M12
Check-Flex G4-W0250
ID: 254
L: 450
H2: 520
W: 350 H: 350
Anchors: 4x M12
Check-Flex G4-W0300
ID: 308
L: 605
H2: 608
W: 500 H: 500
Anchors: 4x M16
Check-Flex G4-W0400
ID: 410
L: 705
H2: 788
W: 650 H: 650
Anchors: 4x M16
Check-Flex G4-W0525
ID: 525
L: 835
H2: 958
W: 800 H: 800
Anchors: 12x M16
Check-Flex G4-W0600
ID: 616
L: 970
H2: 1096
W: 900 H: 900
Anchors: 12x M16
Check-Flex G4-W0800
ID: 812
L: 1200
H2: 1394
W: 1100 H: 1100
Anchors: 12x M20
Check-Flex G4-W0900
ID: 924
L: 1400
H2: 1690
W: 1200 H: 1200
Anchors: 20x M20
Check-Flex G4-W1000
ID: 1015
L: 1410
H2: 1766
W: 1200 H: 1300
Anchors: 20x M20
Check-Flex G4-W1100
ID: 1129
L: 1510
H2: 1920
W: 1400 H: 1400
Anchors: 20x M20
Check-Flex G4-W1200
ID: 1231
L: 1640
H2: 2070
W: 1600 H: 1600
Anchors: 28x M20
Check-Flex G4-W1350
ID: 1385
L: 1745
H2: 2280
W: 1800 H: 1800
Anchors: 28x M20
Check-Flex G4-W1500
ID: 1541
L: 1865
H2: 2410
W: 2000 H: 2000
Anchors: 36x M20
Check-Flex G4-W1600
ID: 1642
L: 1890
H2: 2580
W: 2000 H: 2000
Anchors: 36x M20
Check-Flex G4-W1800
ID: 1847
L: 2150
H2: 2945
W: 2300 H: 2300
Anchors: 36x M20
Table displaying model, style, pipe size range, and pipe connection options for various products.

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ModelStylePipe Size RangePipe Connection
-S-C-W-F / -Fi / -Fd-G
G5Inline Fabricated80–3000mm----
G5MInline Moulded100–150mm-
G5-RESIInline EN13564-180–200mm-
G4Duckbill Fabricated100–2400mm-----
G3Duckbill Fabricated100–2400mm-----
G3MDuckbill Moulded100–150mm-
G2Inline Duckbill Fabricated50–300mm-