815 KAR 20:071.
Storage and installation of Schedule 40, ABS and PVC plastic pipe and fittings.
RELATES TO: KRS
Chapter 318
STATUTORY AUTHORITY:
KRS 318.130
NECESSITY, FUNCTION,
AND CONFORMITY: The office is directed by KRS 318.130 through the State Plumbing
Code Committee to adopt and put into effect a State Plumbing Code. This
administrative regulation relates to the method needed for storage, handling
and installation of schedule 40, ABS and PVC plastic pipe and fittings. This
administrative regulation is being amended because new fittings are now available
which allows for expansion when connecting plastic pipe to metal as well as a
new means of connecting different kinds of plastic pipe.
Section 1. Storage.
(1) Pipe. Pipe shall remain in lifts until ready for use. Lifts shall not be
stacked more than three (3) high and shall always be stacked wood-on-wood.
Loose pipe shall be stored in racks with a minimum support space of three (3)
feet. Pipe shall be shaded but not directly covered when stored outside in high
ambient temperatures to provide for free circulation of air and reduce the heat
buildup due to direct sunlight exposure.
(2) Fittings.
Fittings shall be stored in their original cartons to be kept free of dirt and
to reduce the possibility of damage. If possible, fittings shall be stored
indoors.
(3) Solvent cement
and primers. Solvent cement and primers shall not be exposed to ignition,
sparks, open flames or heat during storage and shall not be used beyond their
marked shelf life.
Section 2. Handling.
Care shall be exercised to avoid rough handling of pipe and fittings. They
shall not be dragged over sharp projections, dropped or have heavy objects
dropped on them. Pipe ends shall be inspected for cracks in the event of abuse
prior to installation. (If transported by truck or trailer, piping shall be reasonably
supported.)
Section 3.
Installation. (1) Underneath concrete floors. Pipe and fittings shall be laid
on stable earth conditions and have four (4) inches of grillage on its bottom,
top and sides. If ground is unstable, it shall be removed and the excavation
filled with grillage to the underneath side of the piping. Soil or waste pipe
shall not be placed in a concrete slab except those pipes that pass vertically
through it.
(2) Above concrete
floors. Horizontal piping shall be properly aligned and installed without
strain. Piping shall not be bent or pulled in position either before or after
solvent welds have been made. It shall be supported at intervals not to exceed
four (4) feet and at the end of the branches and at the change of direction and
shall be so installed as to permit freedom of movement. Vertical piping shall
be supported at their bases and all upward movement shall not be restricted.
Closet flanges shall be securely fastened to the floor through which it passes.
Section 4. Hangers.
Hangers and straps shall be at least one (1) inch wide and shall not compress,
distort, cut or abrade the piping to allow free movement at all times.
Section 5. Making
Solvent Cement Joints. (1)(a) Cement shall not be thinned. Cement that has
thickened shall be discarded. Cement shall not be used beyond its shelf life
and shall not be subject to temperatures below thirty (30) degrees Fahrenheit.
(b) Installers shall
avoid prolonged breathing of vapors. Prolonged contact with skin is harmful.
Install only with adequate ventilation. Avoid contact with eyes and skin.
Solvents are also flammable.
(2) Socket fit. ABS
and PVC fittings are manufactured to a close tolerance. Joints shall be an interference
fit between pipe and fittings. Additional cement shall not be permitted for the
correction of loosely fitted joints.
(3) Joining
techniques. Piping shall be cut square with a saw or pipe cutter designed
especially for plastic pipe. Pipe and fittings shall be protected from serrated
holding devices or abrasions.
(a) Burrs shall be
removed from both inside and outside of the pipe. Dust, dirt and moisture shall
be removed from the surfaces that shall be cemented.
(b) Solvent chemical
cleaner recommended by the company whose product is being installed shall be
applied inside the fitting and on the outside of the piping shall be joined.
(c) A paint brush
shall be used to apply the solvent cement in a moderate, even coating in the
fitting socket as well as covering the pipe on the joining surfaces.
(d) Joints shall be
assembled as quickly as possible before the cement dries. Insert the piping
into the fitting socket turning the pipe slightly to ensure even distribution
to the cement. Hold the piping in a firm position so it does not "back
out" of the joint.
(e) Remove excess
solvent cement from the exterior of the joint with a clean dry cloth. The joint
shall not be handled for a two (2) minute period. A fifteen (15) minute period
shall be allowed for the joint to develop hanging strength.
(f) A Cemented pipe
joint shall not be made in conditions of excessive moisture (ninety (90)
percent humidity level) or when the temperature is below forty (40) degrees or
above ninety (90) degrees Fahrenheit.
Section 6.
Commingling of Plastic Pipe. Plastic pipe shall not be commingled except
through the use of male and female adapters or other transition fittings
approved by administrative regulation of the office.
Section 7. Mixing of
Plastic and Metal Piping. Plastic and metal piping shall discharge into one
another by the use of proper fittings and adapters.
Section 8. Thermal
Expansion. Each plumbing installation shall be engineered and designed giving
due consideration to the expansion characteristics of the material. Expansion
tables for both PVC and ABS schedule 40 plastic piping are as follows:
PVC-DWV
TYPE 1 THERMAL EXPANSION TABLE
Chart
Shows Length Change in Inches
vs.
Degrees Temperature Change
Lg.Ft.
40°F
50°F
60°F
70°F
80°F
90°F
100°F
20
278
.348
.418
.487
.557
.626
.696
40
.557
.696
.835
.974
1.114
1.235
1.392
60
.835
1.044
1.253
1.462
1.670
1.879
2.088
80
1.134
1.392
1.670
1.949
2.227
2.506
2.784
100
.392
1.740
2.088
2.436
2.784
3.132
3.480
ABS-DWV
TYPE 1 THERMAL EXPANSION TABLE
Chart
Shows Length Change in Inches
vs.
Degrees Temperature Change
Lg.Ft.
40°F
50°F
60°F
70°F
80°F
90°F
100°F
20
0.536
0.670
0.80
0.938
1.072
1.206
1.340
40
1.070
1.340
1.610
1.880
2.050
2.420
2.690
60
1.609
2.010
2.410
2.820
3.220
3.620
4.020
80
2.143
2.680
3.220
3.760
4.290
4.830
5.360
100
2.680
3.350
4.020
4.700
5.360
6.030
6.700
(7 Ky.R. 525; 767;
eff. 3-4-81; Am. 16 Ky.R. 2764; 17 Ky.R. 1098; eff. 8-22-90; 19 Ky.R. 1190;
1555; eff. 1-4-93; TAm eff. 8-9-2007; 35 Ky.R. 2591; 36 Ky.R. 87; eff. 7-29-2009.)
