|Adopt Entire Chapter||X||X||X||X||X||X|
|Adopt Entire Chapter as amended (amended sections listed below)||X||X||X|
|Adopt only those sections that are listed below|
The Office of the State Fire Marshal's adoption of this chapter or individual sections is applicable to structures reguluted by other state agencies pursuant to Section 1.11.
Coverings and insulation used for piping shall be of material approved for the operating temperature of the system and the installation environment. Where installed in a plenum, the insulation, jackets, and lap-seal adhesives, including pipe coverings and linings, shall have a flame-spread index not to exceed 25 and a smoke developed index not to exceed 50 where tested in accordance with ASTM E84 or UL 723.
|Gas, 75000 Btu/h or less||CSA Z21.10.1|
|Gas, Above 75000 Btu/h||CSA Z21.10.3|
|Electric, Space Heating||UL 834|
|Solid Fuel||UL 2523|
|OUTSIDE DIAMETER OF
PIPE OR COVERING
|MINIMUM LENGTH OF
|MINIMUM SIZE OF
|1/2 to 11/4||8||1/2|
|11/2 to 2||8||3/4|
|21/2 to 6||12||11/4|
|8 to 10||24||21/2|
- Equal to the size of the valve outlet and shall discharge full size to the flood level of the area receiving the discharge and pointing down.
- Materials shall be rated at not less than the operating temperature of the system and approved for such use.
- Discharge pipe shall discharge independently by gravity through an air gap into the drainage system or outside of the building with the end of the pipe not exceeding 2 feet (610 mm) and not less than 6 inches (152 mm) above the ground and pointing downwards.
- Discharge in such a manner that does not cause personal injury or structural damage.
- No part of such discharge pipe shall be trapped or subject to freezing.
- The terminal end of the pipe shall not be threaded.
- Discharge from a relief valve into a water heater pan shall be prohibited.
- Loop or system head pressure, feet of head (m)
- Capacity, gallons per minute (L/s)
- Maximum and minimum velocity, feet per second (m/s)
- Maximum and minimum temperature, °F (°C)
- Maximum working pressure, pounds per square inch (kPa)
- Fluid type
|Copper/Copper Alloy||ASTM B42, ASTM B43, ASTM B75, ASTM
B88, ASTM B135, ASTM B2512, ASTM B302,
|ASME B16.15, ASME B16.18, ASME B16.22,
ASME B16.23, ASME B16.24, ASME B16.26,
ASME B16.29, ASME B16.51
|Ductile Iron||AWWA C115/A21.15, AWWA C151/A21.51||AWWA C110/A21.101, AWWA C153/A21.53|
|Steel||ASTM A53, ASTM A106, ASTM A254||ASME B16.5, ASME B16.9, ASME B16.11,
|Gray Iron||-||ASTM A126|
|Malleable Iron||-||ASME B16.3|
|Acrylonitrile Butadiene Styrene
|Chlorinated Polyvinyl Chloride
|ASTM D2846, ASTM F441, ASTM D442||ASTM D2846, ASTM F437, ASTM F438,
ASTM F439, ASTM F1970
|Polyethylene (PE) Pipe||ASTM D1693, ASTM D2513, ASTM D2683,
ASTM D2837, ASTM D3035, ASTM D3350,
|ASTM d2609, ASTM D2683, ASTM D3261,
ASTM F1055, CSA B137.1
|Cross-Linked Polyethylene (PEX)||ASTM F876, ASTM F877||ASTM F877, ASTM F1807, ASTM F1960,
ASTM F1961, ASTM F2080, ASTM F2159,
|Polypropylene (PP)||ASTM F2389||-|
|Polyvinyl Chloride (PVC)||ASTM D1785, ASTM D2241||ASTM D2464, ASTM D2466, ASTM D2467,
|Raised Temperature Polyethylene
|ASTM F2623, ASTM F2769||ASTM F1807, ASTM F2159, ASTM F2735,
|ASTM F1281, CSA B137.10||ASTM F1281, ASTM F1974, ASTM F2434,
|ASTM F1282, CSA B137.9||ASTM F1282, ASTM F1974, CSA B1379|
1 Ductile and gray iron.
2 Only type K, L, or M tubing allowed to be installed.
- Removable and non-removable push fit fittings with an elastomeric o-ring that employ quick assembly push fit connectors shall be in accordance with ASSE 1061.
- Solvent cement joints for CPVC pipe and fittings shall be clean tram dirt and moisture. Solvent cements in accordance with ASTM F493, requiring the use of a primer shall be orange in color. The primer shall be colored and be in accordance with ASTM F656. Listed solvent cement in accordance with ASTM F493 that does not require the use of primers, yellow or red in color, shall be permitted for pipe and fittings manufactured in accordance with ASTM D2846, 1/2 of all inch (15 mm) through 2 inches (50 mm) in diameter or ASTM F442, 1/2 of an inch (15 mm) through 3 inches (80 mm) in diameter. Apply primer where required inside the fitting and to the depth of the fitting on pipe. Apply liberal coat of cement to the outside surface of pipe to depth of fitting and inside of fitting. Place pipe inside fitting to forcefully bottom the pipe in the socket and hold together until joint is set.
- Threaded joints for CPVC pipe shall be made with pipe threads in accordance with ASME B1.20.1. A minimum of Schedule 80 shall be permitted to be threaded; and the pressure rating shall be reduced by 50 percent. The use of molded fittings shall not result in a 50 percent reduction in the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water, and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the CPVC components once the thread sealant has been applied. Female CPVC threaded fittings shall be used with plastic male threads only.
- Brazed joints between copper or copper alloy pipe, tubing, or fittings shall be made with brazing alloys having a liquid temperature above 1000°F (538°C). The joint surfaces to be brazed shall be cleaned bright by either manual or mechanical means. Tubing shall be cut square and reamed to full inside diameter. Brazing flux shall be applied to the joint surfaces where required by manufacturer's recommendation. Brazing filler metal in accordance with AWS A5.8 shall be applied at the point where the pipe or tubing enters the socket of the fitting.
- Flared joints for soft copper or copper alloy tubing shall be made with fittings that are in accordance with the applicable standards referenced in Table 1210.1. Pipe or tubing shall be cut square using an appropriate tubing cutter. The tubing shall be reamed to full inside diameter, resized to round, and expanded with a proper flaring tool.
- Mechanically formed tee fittings shall have extracted collars that shall be formed in a continuous operation consisting of drilling a pilot hole and drawing out the pipe or tube surface to form a collar having a height not less than three times the thickness of the branch tube wall. The branch pipe or tube shall be notched to conform to the inner curve of the run pipe or tube and shall have two dimple depth stops to ensure that penetration of the branch pipe or tube into the collar is of a depth for brazing and that the branch pipe or tube does not obstruct the flow in the main line pipe or tube. Dimple depth stops shall be in line with the run of the pipe or tube. The second dimple shall be 1/4 of an inch (6.4 mm) above the first and shall serve as a visual point of inspection. Fittings and joints shall be made by brazing. Soldered joints shall not be permitted.
- Pressed fittings for copper or copper alloy pipe or tubing shall have an elastomeric o-ring that forms the joint. The pipe or tubing shall be fully inserted into the fitting, and the pipe or tubing marked at the shoulder of the fitting. Pipe or tubing shall be cut square, chamfered, and reamed to full inside diameter. The fitting alignment shall be checked against the mark on the pipe or tubing to ensure the pipe or tubing is inserted into the fitting. The joint shall be pressed using the tool recommended by the manufacturer.
- Removable and nonremovable push fit fittings for copper or copper alloy tubing or pipe that employ quick assembly push fit connectors shall be in accordance with ASSE 1061. Push fit fittings for copper pipe or tubing shall have an approved elastomeric o-ring that forms the joint. Pipe or tubing shall be cut square, chamfered, and reamed to full inside diameter. The tubing shall be fully inserted into the fitting, and the tubing marked at the shoulder of the fitting. The fitting alignment shall be checked against the mark on the tubing to ensure the tubing is inserted into the fitting and gripping mechanism has engaged on the pipe.
- Soldered joints between copper or copper alloy pipe, tubing, or fittings shall be made in accordance with ASTM B828. Pipe or tubing shall be cut square and reamed to the full inside diameter including the removal of burrs on the outside of the pipe or tubing. Surfaces to be joined shall be cleaned bright by manual or mechanical means. Flux shall be applied to pipe or tubing and fittings and shall be in accordance with ASTM B813, and shall become noncorrosive and nontoxic after soldering. Insert pipe or tubing into the base of the fitting and remove excess flux. Pipe or tubing and fitting shall be supported to ensure a uniform capillary space around the joint. Solder in accordance with ASTM B32 shall be applied to the joint surfaces until capillary action draws the molten solder into the cup. Joint surfaces shall not be disturbed until cool and any remaining flux residue shall be cleaned.
- Threaded joints for copper or copper alloy pipe shall be made with pipe threads in accordance with ASME B1.20.1. Thread sealant tape or compound shall be applied only on male threads, and such material shall be of approved types, insoluble in water, and nontoxic.
- Mechanical joints between PEX-AL-PEX pipe or fittings shall include mechanical and compression type fittings and insert fittings with a crimping ring. Insert fittings utilizing a crimping ring shall be in accordance with ASTM F1974 or ASTM F2434. Crimp joints for crimp insert fittings shall be joined to PEX-AL-PEX pipe by the compression of a crimp ring around the outer circumference of the pipe, forcing the pipe material into annular spaces formed by ribs on the fitting.
- Compression joints shall include compression insert fittings and shall be joined to PEX-AL-PEX pipe through the compression of a split ring or compression nut around, the outer circumference of the pipe, forcing the pipe material into the annular space formed by the ribs on the fitting.
- Mechanical joints for ductile iron pipe or fittings shall consist of a bell that is cast integrally with the pipe or fitting and provided with an exterior flange having bolt holes and a socket with annular recesses for the sealing gasket and the plain end of the pipe or fitting. The elastomeric gasket shall comply with AWWA C111. Lubricant recommended for the application by the pipe manufacturer shall be applied to the gasket and plain end of the pipe.
- Push-on joints for ductile iron pipe or fittings shall consist of a single elastomeric gasket that shall be assembled by positioning the elastomeric gasket in an annular recess in the pipe or fitting socket and forcing the plain end of the pipe or fitting into the socket. The plain end shall compress the elastomeric gasket to form a positive seal and shall be designed so that the elastomeric gasket shall be locked in place against displacement. The elastomeric gasket shall comply with AWWA C111. Lubricant recommended for the application by the pipe manufacturer shall be applied to the gasket and plain end of the pipe.
- Butt-fusion joints shall be installed in accordance with ASTM F2620 and shall be made by heating the squared ends of two pipes, pipe and fitting, or two fittings by holding ends against a heated element. The heated element shall be removed where the proper melt is obtained and joined ends shall be placed together with applied force.
- Electro-fusion joints shall be heated internally by a conductor at the interface of the joint. Align and restrain fitting to pipe to prevent movement and apply electric current to the fitting. Turn off the current when the proper time has elapse to heat the joint. The joint shall fuse together and remain undisturbed until cool.
- Socket-fusion joints shall be installed in accordance ASTM F2620 and shall be made by simultaneously heating the outside surface of a pipe end and the inside of a fitting socket. Where the proper melt is obtained, the pipe and fitting shall be joined by inserting one into the other with applied force. The joint shall fuse together and remain undisturbed until cool.
- Mechanical joints between PE pipe, tubing, or fittings shall include insert and mechanical compression fittings that provide a pressure seal resistance to pullout. Joints for insert fittings shall be made by cutting the pipe square, using a cutter designed for plastic piping, and removal of sharp edges. Two stainless steel clamps shall be placed over the end of the pipe. Fittings shall be checked for proper size based on the diameter of the pipe. The end of pipe shall be placed over the barbed insert fitting, making contact with the fitting shoulder. Clamps shall be positioned equal to 180 degrees (3.14 rad) apart and shall be tightened to provide a leak tight joint. Compression type couplings and fittings shall be permitted for use in joining PE piping and tubing. Stiffeners that extend beyond the clamp or nut shall be prohibited. Bends shall be not less than 30 pipe diameters, or the coil radius where bending with the coil. Bends shall not be permitted closer than 10 pipe diameters of a fitting or valve. Mechanical joints shall be designed for their intended use.
- Mechanical joints for PE-AL-PE pipe, tubing, or fittings shall be either of the metal insert fittings with a split ring and compression nut or metal insert fittings with copper crimp rings. Metal insert fittings shall comply with ASTM F1974. Crimp insert fittings shall be joined to the pipe by placing the copper crimp ring around the outer circumference of the pipe, forcing the pipe material into the space formed by the ribs on the fitting until the pipe contacts the shoulder of the fitting. The crimp ring shall then be positioned on the pipe so the edge of the crimp ring is 1/8 of an inch (3.2 mm) to 1/4 of an inch (6.4 mm) from the end of the pipe. The jaws of the crimping tool shall be centered over the crimp ring and tool perpendicular to the barb. The jaws shall be closed around the crimp ring and shall not be crimped more than once.
- Compression joints for PE-AL-PE pipe, tubing, or fittings shall be joined through the compression of a split ring, by a compression nut around the circumference of the pipe. The compression nut and split ring shall be placed around the pipe. The ribbed end of the fitting shall be inserted onto the pipe until the pipe contacts the shoulder of the fitting. Position and compress the split ring by tightening the compression nut onto the insert fitting.
- Heat-fusion joints for polypropylene (PP) pipe shall be installed with socket-type heat-fused polypropylene fittings, butt-fusion polypropylene fittings or pipe, or electro-fusion polypropylene fittings. Joint surfaces shall be clean and free from moisture. The joint shall be undisturbed until cool. Joints shall be made in accordance with ASTM F2389 or CSA B137.11.
- Mechanical and compression sleeve joints shall be installed in accordance with the manufacturer's installation instructions. Polypropylene pipe shall not be threaded. Polypropylene transition fittings for connection to other piping materials shall only be threaded by the use of copper alloy or stainless steel inserts molded in the fitting.
- Mechanical joints shall be designed to provide a permanent seal and shall be of the mechanical or push-on joint. The mechanical joint shall include a pipe spigot that has a wall thickness to withstand without deformation or collapse; the compressive force exerted where the fitting is tightened. The push-on joint shall have a minimum wall thickness of the bell at any point between the ring and the pipe barrel. The elastomeric gasket shall comply with ASTM D3139, and be of such size and shape as to provide a compressive force against the spigot and socket after assembly to provide a positive seal.
- Solvent cement joints for PVC pipe or fittings shall be clean from dirt and moisture. Pipe shall be cut square and pipe shall be deburred. Where surfaces to be joined are cleaned and free of dirt, moisture, oil, and other foreign material, apply primer purple in color in accordance with ASTM F656. Primer shall be applied until the surface of the pipe and fitting is softened. Solvent cements in accordance with ASTM D2564 shall be applied to all joint surfaces. Joints shall be made while both the inside socket surface and outside surface of pipe are wet with solvent cement. Hold joint in place and undisturbed for 1 minute after assembly.
- Threads shall comply with ASME B1.20.1. A minimum of Schedule 80 shall be permitted to be threaded; however, the pressure rating shall be reduced by 50 percent. The use of molded fittings shall not result in a 50 percent reduction in the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water, and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the PVC components once the thread sealant has been applied. Female PVC threaded fittings shall be used with plastic male threads only.
- Mechanical joints shall be made with an approved and listed elastomeric gasket.
- Threaded joints shall be made with pipe threads that are in accordance with ASME B1.20.1. Thread sealant tape or compound shall be applied only on male threads, and such material shall be of approved types, insoluble in water, and nontoxic.
- Welded joints shall be made by electrical are or oxygen/acetylene method. Joint surfaces shall be cleaned by an approved procedure. Joints shall be welded by an approved filler metal.
- Pressed joints shall have an elastomeric o-ring that forms the connection. The pipe or tubing shall be fully inserted into the fitting, and the pipe or tubing marked at the shoulder of the fittings. Pipe or tubing shall be cut square, chamfered, and reamed to full inside diameter. The fitting alignment shall be checked against the mark on the pipe or tubing to ensure the pipe or tubing is fully inserted into the fitting. The joint shall be pressed using the tool recommended by the manufacturer.
A pressure-reducing valve shall be installed on the makeup water feed line. The pressure of the feed line shall be set as specified in the design of the system, and connections to potable water shall be in accordance with Section 1202.0 to prevent contamination due to backflow.
- 85°F (29°C) in dwellings, buildings, or structures.
- 85°F (29°C) in occupancies where prolonged foot contact with the floor, and solid or laminated hardwood flooring.
- 90°F (32°C) in bathrooms and indoor swimming pools.
For the purpose of system balancing, each individual loop shall have a tag securely affixed to the manifold to indicate the length of the loop, and the room(s) and area(s) served.
In a single-zone multiple-manifold installation, balanced flow through manifolds shall be as specified in Section 1215.4.
|NOMINAL TUBE SIZE
|MAXIMUM LOOP LENGTH
Where a poured concrete radiant floor system is installed on grade, not less than R-5 insulation shall be installed and placed on vertical slab edges.
Where a poured concrete radiant floor system is installed within a habitable space above and below, the total R-value of the floor system below the concrete slab shall be more than the total R-value of the material lying above the concrete slab and the floor system shall have not less than a R-3 value.
Where tubing is installed above or in the subfloor, the tube spacing shall not exceed 12 inches (305 mm) center-to-center for living areas.
Where tubing is installed in the joist cavity, the cavity shall be insulated with not less than R-12 material.
An air space of not less than 2 inches (51 mm) shall be maintained between the top of the insulation and the underside of the floor unless a conductive plate is installed.
Where tubing is installed above or in the subfloor and not embedded in concrete, the floor assembly shall be insulated with not less than R-12 material below the tubing.
An air space of not less than 2 inches (51 mm) shall be maintained between the insulation and the interior surface of the panel unless a conductive plate is installed.
- Heat transfer medium is either potable water or contains fluids recognized as safe by the Food and Drug Administration (FDA) as food grade.
- A tag or label shall be securely affixed to the heat source with the word, "CAUTION" and the following statements:
- The heat transfer medium shall be water or other nontoxic fluid recognized as safe by the FDA.
- The maximum operating pressure of the heat exchanger shall not exceed the maximum operating pressure of the potable water supply.
- The word "CAUTION" and the statements listed above shall have an uppercase height of not less than 0.120 of an inch (3.048 mm). The vertical spacing between lines of type shall be not less than 0.046 of an inch (1.168 mm). Lowercase letters shall be not less than compatible with the uppercase letter size specification.
Where the normal operating temperature of the boiler or dual-purpose water heater that provides heat input for domestic hot water exceeds 140°F (60°C), a thermostatically controlled mixing valve as specified in Section 1207.3.1 shall be installed to limit the water supplied to the potable hot water system to a temperature of 140°F (60°C) or less. The potability of the water shall be maintained throughout the system.
- Methods included in this chapter.
- Other approved engineering methods acceptable to the Authority Having Jurisdiction.
- Sizing guidelines included in the manufacturer's instructions.
The length of continuous tubing from a supply-and-return manifold arrangement shall not exceed the lengths specified by the manufacturer's installation instructions and system design or, in the absence of manufacturer's specifications, the lengths specified in Table 1220.3.1. Actual loop lengths shall be determined by spacing, flow rate, temperature, and pressure drop, as specified in the system design.
|AVERAGE ACTIVE LOOP
|PE-RT and PEX Tubing|