(i) Screw down type tap:
It consists of a spindle which moved up and down by screw action when rotated. To prevent leakage the spindle is passed through a stuffing box capped by a bush which can be screwed down. It has a valve plate which is flat circular disc, the lower surface of which is faced with a hard rubber or leather washer.
The water way through the body of the tap is closed by a flat circular disc. A hole is drilled through this platform immediately under the spindle. A grand seating is provided around the hole. Handle is fixed on the spindle by means of a squared shank.
(ii) Stop tap:
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Control flow of water.
(iii) Pillar tap:
Used with wash basins, bath tubs
(iv) Waste tap:
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Spring loaded tap.