Check-Flex G3-S Duckbill Check Valve

Clamps directly to the pipe

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Nominal Pipe Size

PVC DN100
Check-Flex G3-S0115
ID: 110mm L: 293mm H: 174mm W: 76mm

Twinwall DN100
Check-Flex G3-S0115
ID: 110mm L: 293mmH: 174mmW: 76mm

Ductile Iron DN100
Check-Flex G3-S0115
ID: 118mm L: 293mm H: 174mm W: 76mm

Polyethylene DN100
Check-Flex G3-S0115
ID: 110mm L: 293mm H: 174mm W: 76mm
Check-Flex G3-S01--
ID: S01--mm L: 393mm H: 268mm W: 102mm
PVC DN150
Check-Flex G3-S0160
ID: 160mm L: 393mm H: 268mm W: 102mm

Twinwall DN150
Check-Flex G3-S0180
ID: 180mm L: 393mm H: 268mm W: 102mm

Ductile Iron DN150
Check-Flex G3-S0180+G
ID: 170mm L: 393mm H: 268mm W: 102mm

Polyethylene DN150
Check-Flex G3-S0160
ID: 160mm L: 393mm H: 268mm W: 102mm

Clay DN150
Check-Flex G3-S0180
ID: 178mm L: 393mm H: 268mm W: 102mm
Polyethylene DN175
Check-Flex G3-S0180
ID: 1c0mm L: 393mm H: 268mm W: 102mm
PVC DN200
Check-Flex G3-S0200
ID: 200mm L: 447mm H: 348mm W: 102mm

Ductile Iron DN200
Check-Flex G3-S0230
ID: 222mm L: 447mm H: 348mm W: 102mm

Polyethylene DN200
Check-Flex G3-S0200
ID: 200mm L: 447mm H: 348mm W: 102mm
PVC DN225
Check-Flex G3-S0250
ID: 245mm L: 522mm H: 428mm W: 102mm

Twinwall DN225
Check-Flex G3-S0267
ID: 267mm L: 522mm H: 428mm W: 102mm

Clay DN225
Check-Flex G3-S0267
ID: 263mm L: 522mm H: 428mm W: 102mm
Ductile Iron DN250
Check-Flex G3-S0278
ID: 278mm L: 522mm H: 428mm W: 102mm

Polyethylene DN250
Check-Flex G3-S0250
ID: 250mm L: 522mm H: 428mm W: 102mm
PVC DN300
Check-Flex G3-S0328+G
ID: 315mm L: 632mm H: 522mm W: 152mm

Twinwall DN300
Check-Flex G3-S0345
ID: 345mm L: 632mm H: 522mm W: 152mm

Ductile Iron DN300
Check-Flex G3-S0328
ID: 328mm L: 632mm H: 522mm W: 152mm

Polyethylene DN300
Check-Flex G3-S0328+G
ID: 315mm L: 632mm H: 522mm W: 152mm

Clay DN300
Check-Flex G3-S0355
ID: 355mm L: 697mm H: 601mm W: 152mm
PVC DN350
Check-Flex G3-S0355
ID: 355mm L: 697mm H: 601mm W: 152mm

Ductile Iron DN350
Check-Flex G3-S0380
ID: 380mm L: 697mm H: 601mm W: 152mm

Polyethylene DN350
Check-Flex G3-S0355
ID: 355mm L: 697mm H: 601mm W: 152mm
Twinwall DN375
Check-Flex G3-S0435
ID: 435mm L: 737mm H: 693mm W: 152mm
PVC DN400
Check-Flex G3-S0410
ID: 400mm L: 737mm H: 693mm W: 152mm

Ductile Iron DN400
Check-Flex G3-S0435
ID: 429mm L: 737mm H: 693mm W: 152mm

Polyethylene DN400
Check-Flex G3-S0434+G
ID: 400mm L: 737mm H: 693mm W: 152mm
Twinwall DN450
Check-Flex G3-S0510
ID: 510mm L: 945mm H: 828mm W: 203mm

Ductile Iron DN450
Check-Flex G3-S0490
ID: 490mm L: 842mm H: 778mm W: 152mm
Ductile Iron DN500
Check-Flex G3-S0540
ID: 532mm L: 945mm H: 828mm W: 203mm

Polyethylene DN500
Check-Flex G3-S0510
ID: 500mm L: 945mm H: 828mm W: 203mm
Twinwall DN600
Check-Flex G3-S0680
ID: 680mm L: 1106mm H: 964mm W: 203mm

Ductile Iron DN600
Check-Flex G3-S0635
ID: 635mm L: 1106mm H: 964mm W: 203mm

Polyethylene DN600
Check-Flex G3-S0635
ID: 630mm L: 1106mm H: 964mm W: 203mm
Ductile Iron DN700
Check-Flex G3-S0740ID: 740mm L: 1198mm H: 1151mm W: 203mm

Check-Flex G3-S07--
Built To Order Valves
Specify Pipe Outside Diameter
Ductile Iron DN800
Check-Flex G3-S0840
ID: 842mm L: 1359mm H: 1295mm W: 254mm

Check-Flex G3-S08--
Built To Order Valves
Specify Pipe Outside Diameter
Ductile Iron DN900
Check-Flex G3-S0940
ID: 945mm L: 1619mm H: 1512mm W: 254mm

Check-Flex G3-S09--
Built To Order Valves
Specify Pipe Outside Diameter
Ductile Iron DN1000
Check-Flex G3-S1050
ID: 1050mm L: 1624mm H: 1671mm W: 254mm


Check-Flex G3-S1---
Built To Order Valves
Specify Pipe Outside Diameter
Check-Flex G3-S12--
Built To Order Valves
Specify Pipe Outside Diameter
Check-Flex G3-S----
Built To Order Valves
Specify Pipe Outside Diameter

Table displaying model, style, pipe size range, and pipe connection options for various products.
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-