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Section M2101 Hydronic Piping Systems Installation
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Hydronic piping shall conform to Table M2101.1. Approved piping, valves, fittings and connections shall be installed in accordance with the manufacturer's instructions. Pipe and fittings shall be rated for use at the operating temperature and pressure of the hydronic system. Used pipe, fittings, valves or other materials shall be free of foreign materials.
For SI: °C = [(°F)-32]/1.8.
MATERIAL | USE CODEa |
STANDARDb | JOINTS | NOTES |
---|---|---|---|---|
Acrylonitrile butadiene styrene (ABS) plastic pipe |
1, 5 | ASTM D1527; ASTM F2806; ASTM F2969 |
Solvent cement joints | |
Brass pipe | 1 | ASTM B43 | Brazed, welded, threaded, mechanical and flanged fittings |
|
Brass tubing | 1 | ASTM B135 | Brazed, soldered and mechanical fittings | |
Chlorinated poly (vinyl chloride) (CPVC) pipe and tubing |
1, 2, 3 | ASTM D2846 | Solvent cement joints, compression joints and threaded adapters | |
Copper pipe | 1 | ASTM B42, B302 |
Brazed, soldered and mechanical fittings threaded, welded and flanged |
|
Copper tubing (type K, Lor M) | 1, 2 | ASTM B75, B88, B251, B306 |
Brazed, soldered and flared mechanical fittings |
Joints embedded in concrete |
Cross-linked polyethylene (PEX) | 1, 2, 3 | ASTM F876, F877 |
(See PEX fittings) | Install in accordance with manufacturer's instructions |
Cross-linked polyethylene/ aluminum/cross -linked polyethylene-(PEX-AL-PEX) pressure pipe |
1, 2 | ASTM F1281 or CAN/CSA B137.10 |
Mechanical, crimp/insert | Install in accordance with manufacturer's instructions |
PEX fittings | ASTM F 877 ASTM F 1807 ASTM F 1960 ASTM F 2098 ASTM F 2159 ASTM F 2735 |
Copper-crimp/insert fittings, cold expansion fittings, stainless steel clamp, insert fittings |
Install in accordance with manufacturer's instructions |
|
Polybutylene (PB) pipe and tubing | 1, 2, 3 | ASTM D3309 | Heat-fusion, crimp/insert and compression | Joints in concrete shall be heat-fused |
Polyethylene/aluminum/polyethylene (PE-AL-PE) pressure pipe |
1, 2, 3 | ASTM F1282 CSA B 137.9 |
Mechanical, crimp/insert | |
Polypropylene (PP) | 1, 2, 3 | ISO 15874 ASTM F 2389 |
Heat-fusion joints, mechanical fittings, threaded adapters, compression joints |
|
Raised temperature polyethylene PE-RT) |
1, 2, 3 | ASTM F2623 ASTM F2769 |
Copper crimp/insert fitting stainless steel clamp, insert fittings |
|
Raised temperature polyethylene PE-RT) fittings |
1, 2, 3 | ASTM F1807 ASTM F2159 ASTM F2735 ASTM F2769 ASTM F2098 |
Copper crimp/insert fitting stainless steel clamp, insert fittings |
|
Steel pipe | 1, 2 | ASTM A53, A106 |
Brazed, welded, threaded, flanged and mechanical fittings |
Joints in concrete shall be welded. Galvanized pipe shall not be welded or brazed. |
Steel tubing | 1 | ASTM A 254 | Mechanical fittings, welded |
- Use code:
- Above ground.
- Embedded in radiant systems.
- Temperatures below 180°F only.
- Low temperature (below 130°F) applications only.
- Temperatures below 160°F only.
- Standards as listed in Chapter 44.
Hydronic piping systems shall be installed to permit draining of the system. Where the system drains to the plumbing drainage system, the installation shall conform to the requirements of Chapters 25 through 32 of this code.
Exception: The buried portions of systems embedded underground or under floors.
The potable water
system shall be protected from backflow in accordance with
the provisions listed in Section P2902.
Openings through concrete or
masonry building elements shall be sleeved.
A hydronic piping
system shall not be in direct contact with any building
material that causes the piping material to degrade or corrode.
Wood-framed structural
members shall be drilled, notched or altered in accordance
with the provisions of Sections R502.8, R602.6, R602.6.1
and R802.7. Holes in load bearing members of cold-formed
steel light-frame construction shall be permitted only in
accordance with Sections R505.2.6, R603.2.6 and R804.2.6.
In accordance with the provisions of Sections R505.3.5,
R603.3.4 and R804.3.3, cutting and notching of flanges and
lips of load-bearing members of cold-formed steel lightframe
construction shall not be permitted. Structural insulated
panels (SIPs) shall be drilled and notched or altered in accordance
with the provisions of Section R610.7.
Fluid in the supply
side of a hydronic system shall not enter a tee fitting through
the branch opening.
Piping
shall be installed so that piping, connections and equipment
shall not be subjected to excessive strains or stresses. Provisions
shall be made to compensate for expansion, contraction,
shrinkage and structural settlement.
Hangers and supports shall be of material of sufficient strength to support the piping, and shall be fabricated from materials compatible with the piping material. Piping shall be supported at intervals not exceeding the spacing specified in Table M2101.9.
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
PIPING MATERIAL | MAXIMUM HORIZONTAL SPACING (feet) |
MAXIMUM VERTICAL SPACING (feet) |
---|---|---|
ABS | 4 | 10a |
CPVC ≤ 1-inch pipe or tubing | 3 | 5a |
CPVC ≥ 1 1/4 inches | 4 | 10a |
Copper or copper alloy pipe | 12 | 10 |
Copper or copper alloy tubing | 6 | 10 |
PB pipe or tubing | 2.67 | 4 |
PE pipe or tubing | 2.67 | 4 |
PE-RT ≤ 1 inch | 2.67 | 10a |
PE-RT ≥ 1 1/4 inches | 4 | 10a |
PEX tubing | 2.67 | 4 |
PP < 1-inch pipe or tubing | 2.67 | 4 |
PP > 1 1/4 inches | 4 | 10a |
PVC | 4 | 10a |
Steel pipe | 12 | 15 |
Steel tubing | 8 | 10 |
a. For sizes 2 inches and smaller, a guide shall be installed midway between required vertical supports. Such guides shall prevent pipe movement in a direction perpendicular to the axis of the pipe.
Hydronic piping systems shall be tested
hydrostatically at a pressure of one and one-half times the
maximum system design pressure, but not less than 100
pounds per square inch (689 kPa). The duration of each test
shall be not less than 15 minutes and not more than 20 minutes.
Related Code Sections
Section M2101 Hydronic Piping, Hydronic Piping Systems Installation
44.
Hydronic piping systems shall be installed ...
M2101.3 Hydronic Piping, Protection of Potable Water
The potable water
system shall be protected from backflow in accordance with
the provisions listed in Section P2902 ...
2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation > M2101.3 Protection of Potable Water
M2101.5 Hydronic Piping, Contact With Building Material
A hydronic piping
system shall not be in direct contact with any building
material that causes the piping material to degrade or corrode ...
2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation > M2101.5 Contact With Building Material
M2101.6 Hydronic Piping, Drilling and Notching
Wood-framed structural
members shall be drilled, notched or altered in accordance
with the provisions of Sections R502.8, R602.6, R602.6.1
and R802.7 ...
2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation > M2101.6 Drilling and Notching
M2101.7 Hydronic Piping, Prohibited Tee Applications
Fluid in the supply
side of a hydronic system shall not enter a tee fitting through
the branch opening ...
2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation > M2101.7 Prohibited Tee Applications