28 mm x 1" BSP parallel male Polyplumb tank connector. Colour: grey. Supplied with EPDM washer. Hand tighten. for cold water.

PolyPlumb is a permanent grey plastic push-fit system for domestic hot and cold water supply, radiator and underfloor heating installations.
Pipe stiffeners must be used when using plastic pipe; these are not required for copper pipe. PolyPlumb must not be used for gas, oil, compressed air,solar heating, primary or gravity pipework from a solid fuel back boiler.