156 NEW WATER SUPPLY SYSTEM AT TAMPA, FLORIDA. i

is directly across the hall. The entire filter gallery can be seen freif the
corridor. An alarm bell and light located there indicate the level of the
water in the wash-water tank.
 At the other end of the corridor is located the chlorine roonj ;nd
 chemical feed room. The raw-water Venturi-meter register, and pther
 recording apparatus, are also located there. The retort room, chemical
 storage room, mixing tanks and settling basin are close at hand. The
 chemist in the laboratory also shares this central location.
 The laboratory has been planned to afford a compact and convenient
Arrangement of the laboratory apparatus. Lighting and ventilation1 here




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 FIG. 27. S ,TRINER SYSTEM.

 and in the offices are taken care of by means of large window openings and
 roof monitors. Corridor sash allows ventilation across the entire width
 of the building. This, together with the double roof, should add grea y to
 the comfort of the occupants.
 The chlorine room contains two Wallace and Tiernan vacuum type
 M.S.V. chlorinators, feeding chlorine directly into the filtered water conduit
 which passes underneath the room.
 Filters. Eight concrete gravity filters, having a normal capacity of
 1.5 to 1.75 million gal. each, are included in the present installation.
 The influent to the filters is carried in concrete ducts along their o iode
 walls, thus relieving the pipe gallery of that much of large piping. The
 filters are built in two sections, having a combined area of 600 squ e ft.