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// CODE SNIPPET

Section M2101 Hydronic Piping Systems Installation

2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation
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M2101.1 General

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.
TABLE M2101.1
HYDRONIC PIPING MATERIALS
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  
For SI: °C = [(°F)-32]/1.8.
  1. Use code:
    1. Above ground.
    2. Embedded in radiant systems.
    3. Temperatures below 180°F only.
    4. Low temperature (below 130°F) applications only.
    5. Temperatures below 160°F only.
  2. Standards as listed in Chapter 44.

M2101.2 System Drain Down

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.

M2101.3 Protection of Potable Water

The potable water system shall be protected from backflow in accordance with the provisions listed in Section P2902.

M2101.4 Pipe Penetrations

Openings through concrete or masonry building elements shall be sleeved.

M2101.5 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.

M2101.6 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. 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.

M2101.7 Prohibited Tee Applications

Fluid in the supply side of a hydronic system shall not enter a tee fitting through the branch opening.

M2101.8 Expansion, Contraction and Settlement

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.

M2101.9 Piping Support

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.
TABLE M2101.9
HANGER SPACING INTERVALS
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
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
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.

M2101.10 Tests

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 ...
2015 Michigan Residential Code > 21 Hydronic Piping > M2101 Hydronic Piping Systems Installation
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
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