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Non-return valve CLASSIC with single flap and socket/spigot end protects the sewer pipe against backflow.

Non-return valve CLASSIC is a non-return valve with a single flap for gravity sewers. It allows the wastewater flow through in the normal direction and closes automatically when water starts to flow back, protecting basements, floor drains and low-lying installations against backflow from the main. The valve is supplied with a socket at one end and a spigot end at the other, allowing it to be connected into the pipeline without additional transition pieces.
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6 variants
| RSK no. | Item no. | DNmm | Smm | Längdspetsändemm | Längdmuffände L2mm | Tot.längd L3mm | Heightmm | Notering | Quote |
|---|---|---|---|---|---|---|---|---|---|
| 4425607 | 1552091 | 200 | 4,5 | 100 | 84 | 451 | 300 | Med läppring | |
| 4425608 | 1552591 | 250 | 6,2 | 130 | 102 | 520 | 374 | — | |
| 4425609 | 1553091 | 315 | 7,7 | 160 | 125 | 615 | 440 | — | |
| 4425610 | 1554091 | 400 | 9,8 | 245 | 140 | 800 | 480 | Ej nödavstängning | |
| 4425611 | T555191 | 500 | 645 | 1100 | 460 | 260 | — | Med läppring, ej nödavstängning | |
| 4425612 | T556391 | 630 | 775 | 1300 | 460 | 260 | — | Med läppring, ej nödavstängning |