A connector assembly for connecting water tubes, comprising: first and second connectors (10, 30a), each connector (10, 30a) comprising: a first end (11, 31) for connection to the first end (11, 31) of the other connector (10, 30a); and a second end (12, 32a) for connection to a water tube, the first and second connectors (10, 30a) connectable to each other to define a bore through the connector assembly with a first axis, wherein: the first end of the first connector is configured to be received within the first end of the second connector, the first end of the first connector comprising: a seal on an outer surface thereof for sealing engagement with an inner surface of the first end of the second connector; and an outer circumferential groove, the first end of the second connector further comprises at least one opening alignable with the circumferential groove when the first and second connectors (10, 30a) are connected to each other, the connector assembly further comprising: a pin locatable in the or each opening which projects into the circumferential groove when the first and second connectors (10, 30a) are connected to each other, thereby to retain the first and second connectors (10, 30a) in the connected configuration while permitting relative rotation of the first and second connectors (10, 30a) about the first axis, characterised in that the connector assembly further comprises a grip sleeve configured to engage with an outer surface of the first connector for applying additional torque thereto. first and second connectors (10, 30a), each connector (10, 30a) comprising: a first end (11, 31) for connection to the first end (11, 31) of the other connector (10, 30a); and a second end (12, 32a) for connection to a water tube, a first end (11, 31) for connection to the first end (11, 31) of the other connector (10, 30a); and a second end (12, 32a) for connection to a water tube, the first and second connectors (10, 30a) connectable to each other to define a bore through the connector assembly with a first axis, the first end of the first connector is configured to be received within the first end of the second connector, the first end of the first connector comprising: a seal on an outer surface thereof for sealing engagement with an inner surface of the first end of the second connector; and an outer circumferential groove, a seal on an outer surface thereof for sealing engagement with an inner surface of the first end of the second connector; and an outer circumferential groove, the first end of the second connector further comprises at least one opening alignable with the circumferential groove when the first and second connectors (10, 30a) are connected to each other, a pin locatable in the or each opening which projects into the circumferential groove when the first and second connectors (10, 30a) are connected to each other, thereby to retain the first and second connectors (10, 30a) in the connected configuration while permitting relative rotation of the first and second connectors (10, 30a) about the first axis, characterised in that the connector assembly further comprises a grip sleeve configured to engage with an outer surface of the first connector for applying additional torque thereto.