English to Russian Medical Medical (general)

Urine Meter

... Emptying of the measuring chamber: Rotate the tap on top of the chamber by 90° (as indicated on the chamber) to let the urine flow into the collection bag (5). Do not rotate the tap by more than 90° as this may cause dislodgement. Once the chamber is empty, close the tap again by turning it 90° backwards. Close the tap completely. Do not leave the tap open.

Здесь "tap" - краник, отвод, трубка?
Спасибо.