Flow Control - Hydrants​

Insertion/Gasket Kits and Di Fitting Rubbers

Derwent has available an extensive range of Insertion / Gasket kits and gaskets to suit the various requirements of the industry when installing DI Fittings. This range includes:


SWAB Spring Hydrants are used where swabbing of the line is required. The top of the Spring Hydrant and internals can be removed to allow for the SWAB to pass through the hydrant.

Product CodeDescription


  • Series 2 Gaskets         DN 80 – DN 750
  • Lip Seal Gaskets         DN 100 – DN 150
  • Transition Series1       DN 80 – DN 450