815 KAR 20:072.

Installation standards for cast iron soil 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 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.

 

      Section 2.

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

pipe.

      (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.

      (2) Horizontal

piping, suspended.

      (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.

      (3) Horizontal

piping, underground.

      (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

poured.

      (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

properly cleaned.

      (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.

 

      Section 5.

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

described below.

      (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

of torque.

      (b) Step 2. The

outer bands shall be tightened alternately and firmly to sixty (60) inch pounds

of torque.

      (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.)