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Key benefits of the Graf system
- Pipe duct access on all four sides of the chamber.
- Pushfit sealed pipe connections points for 110mm diameter pipework.
- The chamber has a flat invert with a domed centre to assist with the flow of water through the chamber.
- There is no sump in the chamber which avoids the possibility of the water sitting and stagnating.
- The shaft can be used as an external sampling chamber.
- The access cover can be fitted with vents which can turn the chamber into a low level vent
- 350mm & 650mm extension pieces are available.