815 KAR 20:072.
Installation standards for cast iron soil pipe and fittings.
RELATES TO: KRS
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 proper installation of cast iron
soil pipe and fittings. This amendment is necessary to bring the administrative
regulation into technical compliance with KRS Chapter 13A. No other substantive
changes were made.
Section 1. The
installation of cast iron soil pipe and fittings shall be made according to
recommended procedures, since care taken in installing will assure the
satisfactory performance of the plumbing drainage system.
Instructions for Cutting Cast Iron Soil Pipe. (1) During installation assembly,
pipe and fittings shall be inserted into the hub or into the gasket and firmly
seated against the bottom of the hub or against the center rib or shoulder of
the gasket. To provide a sound joint with field cut lengths of pipe, it is
necessary to have the ends cut square and as smooth as possible with metal
cutting saw or snap type cutters.
(2) Cast iron soil
pipe, which may vary somewhat in toughness and resiliency, shall be cut with a
twin-lever snap cutter or a ratchet type cutter equipped with a chain which
contains equally spaced beveled cutting wheels. The following cutting procedure
has been found to produce consistently good cuts:
(a) Position chain
around pipe so that a maximum number of wheels are in contact with the pipe.
Excessive space between the first and last wheel in contact with the pipe is
almost certain to produce a poor quality cut.
(b) Score the pipe
before final pressure is applied to complete the cut. Apply only enough
pressure to the lever or ratchet handle to make the cutter wheels indent the
(c) Release the
pressure and rotate tool a few degrees; then apply a quick final pressure to
complete the cut. If a piece of pipe is unusually tough, score the pipe several
times and a good cut can be made. If the cutter wheels become flattened or
dull, it will be very difficult (if not impossible) to obtain a satisfactory
cut. The life of the chain can be extended by reversing the chain to obtain
equal use of all the wheels. The mechanical features of a cutter shall be kept
in good working order.
Section 3. General
Installation Instructions. (1) Vertical piping.
(a) Secure vertical
piping at sufficiently close intervals to keep the pipe in alignment and to
support the weight of the pipe and its contents. Support stacks at their bases
and at sufficient floor intervals to meet the requirements of local codes.
Approved metal clamps or hangers shall be used for this purpose.
(b) If vertical
piping is to stand free of any support or if no structural element is available
for support and stability during construction, secure the piping in its proper
position by means of adequate stakes or braces fastened to the pipe.
(a) Support ordinary
horizontal piping and fittings at sufficiently close intervals to maintain
alignment and prevent sagging or grade reversal. Support each length of pipe by
an approved hanger located not more than eighteen (18) inches from the joint.
(b) Support terminal
ends of all horizontal runs or branches and each change of direction or
alignment by an approved hanger.
(c) Closet bends
installed above ground shall be firmly secured.
(a) When trenches
are dug too deep, support the piping with approved grillage laid on firm ground
as denoted in 815 KAR 20:130. To maintain proper alignment during backfilling,
stabilize the pipe in proper position by partial backfilling and cradling.
(b) Piping laid on
grade shall be adequately secured to prevent misalignment when the slab is
(c) Closet bends
installed under slabs shall be adequately secured.
Section 4. Lead and
Oakum Joint Installation. (1) Insert the spigot into the hub which has been
(2) An oakum strand
shall be inserted into the joint which is of a diameter that can be pressed
into the joint by hand and sufficiently long to make three (3) turns around the
pipe. Drive the strand of oakum to the bottom of the joint using a yarning
iron. Pack the oakum solidly and evenly using a packing iron and hammer.
(3) Place additional
strands of oakum into the joint until it fills the hub to within one-half (1/2)
inch of the top, and using a packing iron and hammer, pack this oakum until it
forms a uniform surface one (1) inch from the top of the hub.
(4) Pour molten lead
into the joint at one (1) spot between the hub and spigot until it arches up
slightly above the top of the hub.
(5) When the lead
has cooled, drive it down at four (4) points around the hub using a caulking
iron to insure uniform caulking.
(6) Caulk the joint
on the inside and outside edges using a sixteen (16) ounce ball peen hammer and
appropriate caulking irons.
Compression Joint Installation. (1) Fold and insert the one (1) piece rubber
gasket into the hub which has been properly cleaned.
(2) Apply special
gasket lubricant to the spigot and inside of the neoprene gasket.
(3) Push, draw or
drive the spigot into the gasketed hub with a pulling tool or suitable device.
Section 6. No-hub
Joint Installation. (1) Clamp and gasket installation. The following procedures
shall be taken to insure a proper joint:
(a) Place the gasket
on the end of one (1) pipe and the stainless steel or cast iron clamp assembly
on the end of the other pipe.
(b) Firmly seat the
pipe ends against the integrally molded shoulder inside the neoprene gasket.
(c) Slide the clamp
assembly into position over the gasket and tighten the bands or clamps as
(2) Torquing bands.
A properly calibrated torque wrench, set at sixty (60) inch pounds shall be
used. The following procedure for applying torque to the band assembly shall be
used: The stainless steel bands shall be tightened alternately and firmly to sixty
(60) inch pounds of torque.
(a) Step 1. The
inner bands shall be tightened alternately and firmly to sixty (60) inch pounds
(b) Step 2. The
outer bands shall be tightened alternately and firmly to sixty (60) inch pounds
(3) Torquing clamps.
A properly calibrated torque wrench, set at 175 inch pounds shall be used. The
following procedure for applying torque to the clamp assembly shall be used:
The stainless steel bolts shall be tightened alternately, gradually and firmly
to 175 inch pounds torque. (9 Ky.R. 657; eff. 12-1-82; Am. 10 Ky.R. 1010; eff.
3-31-84; 17 Ky.R. 2885; eff. 5-3-91; TAm eff. 8-9-2007.)