with intermediate atmospheric vent shall conform to ASSE 1012. Reduced
pressure principle backflow preventers shall conform to ASSE 1013. Hose
connection vacuum breakers shall conform to ASSE 1011. Pipe applied
atmospheric type vacuum breakers shall conform to ASSE 1001. Pressure
vacuum breaker assembly shall conform to ASSE 1020. Air gaps in plumbing
systems shall conform to ASME A112.1.2.
2.6
DRAINS
2.6.1
Floor and Shower Drains
Floor and shower drains shall consist of a galvanized body, integral
seepage pan, and adjustable perforated or slotted chromium-plated bronze,
nickel-bronze, or nickel-brass strainer, consisting of grate and threaded
collar. Floor drains shall be cast iron, except where metallic
waterproofing membrane is installed. Drains shall be of double drainage
pattern for embedding in the floor construction. The seepage pan shall
have weep holes or channels for drainage to the drain pipe. The strainer
shall be adjustable to floor thickness. A clamping device for attaching
flashing or waterproofing membrane to the seepage pan without damaging the
flashing or waterproofing membrane shall be provided when required. Drains
shall be provided with threaded connection. Between the drain outlet and
waste pipe, a neoprene rubber gasket conforming to ASTM C 564 may be
installed, provided that the drain is specifically designed for the rubber
gasket compression type joint. Floor and shower drains shall conform to
ASME A112.6.3.
2.6.1.1
Metallic Shower Pan Drains
Where metallic shower pan membrane is installed, polyethylene drain with
corrosion-resistant screws for securing the clamping device shall be
provided. Polyethylene drains shall have fittings to adapt drain-to-waste
piping. Polyethylene floor drains shall be constructed of polyethylene
conforming to ASTM D 1248. Drains shall have separate cast-iron "P" trap,
circular body, seepage pan, and chrome-plated strainer, unless otherwise
indicated.
2.6.1.2
Drains and Backwater Valves
Drains and backwater valves installed in connection with waterproofed
floors or shower pans shall be equipped with bolted-type device to securely
clamp flashing.
2.6.2
Area Drains
Area drains shall be plain pattern with polished stainless steel perforated
or slotted grate and bottom outlet. The drain shall be circular or square,
with a 300 mm 12 inch nominal overall width or diameter and 250 mm 10 inch
nominal overall depth. Drains shall be cast iron with manufacturer's
standard coating. Grate shall be easily lifted out for cleaning. Outlet
shall be suitable for inside caulked connection to drainpipe. Drains shall
conform to ASME A112.6.3.
2.6.3
Floor Sinks
Floor sinks shall be circular or square, with 300 mm 12 inch nominal
overall width or diameter and 250 mm 10 inch nominal overall depth. Floor
sink shall have an acid-resistant enamel interior finish with cast-iron
body and aluminum sediment bucket, and perforated grate of cast iron in
SECTION 15405A
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