[1656]. Common plate slide valve or sluice, used for blast pipes.

[1657]. Floating ball valve, for automatic discharge of air from water mains.

[1658]. Ordinary double-faced sluice valve, lifts clear of the water way.

[Larger plate.]

[1659]. Single face sluice valve, for sewage water, &c.

[1660]. Flap sluice valve. Tidal outlet valve.

[1661]. Diaphragm valve.

[1662]. Oscillating disc valve, for gas.

[1663]. Large 3 or 4-way plug cock.