Current through Register Vol. 50, No. 9, September 20, 2024
A. General. Water distribution pipe, tubing
and fittings shall comply with the following.
1. Minimum working pressure for plastic hot
and cold piping material installed inside of the foundation walls shall be 100
psi (689.5 kPa) at 180°F (82°C), with permanent identification
markings.
2. Materials subject to
corrosion shall be protected when installed in corrosive soils. Approved
fittings shall be used on the water distribution system and the water supply
system, except that changes of direction in copper tube (ASTM B 88) may be made
with bends having a radius of not less than four diameters of the tube,
providing that such bends are made by use of forming equipment which does not
deform or create loss in cross-sectional area of the tube. If allowed by the
manufacturer, bends of pressure-rated plastic pipe listed in Table 603 of this
code shall be installed to conform with the manufacturer's recommendations but
in no case shall the bend radius be less than the requirements contained within
§619. A.5 of this code, as applicable.
3. All potable water pipes, pipe fittings,
plumbing fittings, or fixtures for the water distribution system shall be
evaluated and listed as conforming to NSF/ANSI 372. Any solder or flux which is
used in the installation or repair of any plumbing including, but not limited
to, water distribution pipes in a residential or nonresidential facility
providing water for human consumption shall be lead free.
a. Exception. The lead free requirement of
§619. A.3 of this code above shall not apply to:
i. leaded joints necessary for the repair of
existing cast iron pipes;
ii.
pipes, pipe fittings, plumbing fittings, or fixtures, including backflow
preventers, that are used exclusively for nonpotable services such as
manufacturing, industrial processing, irrigation, outdoor watering, or any
other uses where the water is not anticipated to be used for human consumption;
or,
iii. toilets, bidets, urinals,
fill valves, flushometer valves, tub fillers, shower valves, service saddles,
or water distribution main gate valves that are 2 inches in diameter or
larger.
4.
All pipes and pipe fittings shall conform to the standards listed in Table 603
of this code. All solder and flux shall conform to the applicable standard(s)
listed in Table 303 of this code.
5. Bends of cross-linked polyethylene (PEX)
plastic tubing shall be installed to conform to the manufacturer's
recommendations but in no case shall the bend radius be less than the
following:
a. When bent with the coil-a
bending radius equivalent to or greater than 8 times the outside diameter of
the tubing shall be maintained. Outside diameter is equal to the inside nominal
diameter plus 1/8-inch.
b. When
bent against the coil-a bending radius equivalent to or greater than 24 times
the outside diameter of the tubing shall be maintained. Outside diameter is
equal to the inside nominal diameter plus 1/8-inch.
6. Because the linear expansion rate for
cross-linked polyethylene (PEX) tubing is about 1 inch/10°F for each 100 feet
(30 m) of tubing, it should not be rigidly anchored to any support in order to
allow for freedom of movement during expansion and contraction. When installing
long runs of tubing, a longitudinal clearance of 1/8 to 3/16 inch per foot of
run should be allowed to accommodate for thermal expansion. PEX tubing, where
it passes through concrete or a similar building material which would not allow
for freedom of linear expansion, shall be provided with a pipe sleeve of
Schedule 40 pipe which shall be built into the foundation, footing, floor, wall
or ceiling. Such pipe sleeve shall be of sufficient inside diameter to allow
for the free expansion and contraction of the PEX tubing and to prevent any
rubbing action.
7. The maximum
recommended spacing between horizontal supports for cross-linked polyethylene
(PEX) tubing is 32 inches (813 mm) for nominal tubing diameters from 1/4- inch
through 2-inch. It should not be rigidly secured to a joist or stud but should
be secured with smooth plastic strap hangers, which permit ease of movement
during expansion or contraction. Valve and fixture connections to which PEX
pipe is connected shall be rigidly anchored.
8. Bends of chlorinated polyvinyl chloride
(CPVC) plastic pipe shall be installed to conform to the manufacturer's
recommendations but in no case shall the bend radius be less than the
following:
a. A bending radius equivalent to
or greater than 18 inches (457 mm) for 1/2 and 3/4-inch inside nominal diameter
piping.
b. A bending radius
equivalent to or greater than 24 inches (610 mm) for 1-inch inside nominal
diameter piping.
B. Materials Above Ground. Materials for
water distribution pipes and tubing shall be brass, copper water tube minimum
type L (i.e., type M copper is prohibited), stainless steel water pipe or
tubing (Types 304/304L and 316/316L only), cast iron pressure pipe,
ductile-iron, galvanized steel, pressure-rated polypropylene (PP), chlorinated
polyvinyl chloride (CPVC) or cross-linked polyethylene (PEX) plastic pipe or
tubing, all to be installed with approved fittings and bends; except that
changes in direction in copper tube (ASTM B 88) may be made with bends having a
radius of not less than four diameters of the tube, providing that such bends
are made by use of forming equipment which does not deform or create a loss in
cross-sectional area of the tube. Translucent PEX plastic pipe or tubing, when
installed above ground, shall not be exposed to direct or indirect
sunlight.
C. Materials Below
Ground. Inaccessible water distribution piping under slabs shall be copper
water tube minimum type L (i.e., type M copper is prohibited), brass, stainless
steel water pipe (types 304/304L and 316/316L only), cast iron pressure pipe,
ductile-iron pipe, chlorinated polyvinyl chloride (CPVC), pressure-rated
polypropylene (PP) or cross-linked polyethylene (PEX) plastic pipe or tubing,
all to be installed with approved joining methods or bends. All copper, brass
and stainless steel joints below a building slab shall be brazed and/or welded
in accordance with §315. D and §621. D of this code, as
appropriate. Heat fused joints for polypropylene shall be made in accordance
with §621. E.3 of this code. With the exception of heat fused polypropylene,
all other joints and fittings for plastic pipe below a building slab are
prohibited. Any material subject to corrosion shall be protected when used in
corrosive soils.
D. Valves. Valves
shall conform to the standards listed in Table 619.D of this code below.
|
Table 619.D
Valve Standards
|
|
Materials
|
Standards
|
|
Valves, Bronze Gate, Globe, Angle, Check
|
MSS SP-80
|
|
Valves, Cast Iron
|
ASTM A 126
|
|
Valves, Ball
|
MSS SP-72. MSS SP-110
|
|
Valves, Resilient-Seated Gate
|
AWWA C509
|
The text in this
Section will be effective on January 1, 2013.
AUTHORITY NOTE:
Promulgated in accordance with
R.S.
40:4(A)(7),
R.S.
40:5(2)(3)(7)(9)(16)(17)(20),
and
R.S.
40:1299.27.1.
