Install Instructions

IM-MP 724992 0117
4
1 System Description
The Viega MegaPress fitting system is a state-of-the-art
IPS press fitting system that provides an economical and
reliable installation of schedule 5 to schedule 40 ASTM
A53, A106, A135 and A795 steel pipes. Viega MegaPress
fittings are available in sizes ranging from ½" to 2" and
provide a fast, reliable, consistent joining method.
Our products are the result of decades of experience
in manufacturing press fittings. The Viega MegaPress
fitting system is offered in configurations that allow for the
installation of the vast majority of black iron piping applications
in the residential, commercial and industrial markets.
The Viega MegaPress fitting system requires no threading
or welding and poses no fire hazard, which is particularly
important in restoration or retrofit work. The press fittings
are installed with a battery-powered or corded pressing tool.
The advantages of installing Viega MegaPress fitting
system include:
• Most labor savings
• Lowest overall installed cost
• Proven joining technology
• Technical field support
• Drastically reduces installation time
• No special certification required
1.1 Viega MegaPress
Viega MegaPress ½" to 2" fittings feature an EPDM
sealing element suitable for the following applications:
• Hydronic Heating
• Chilled Water
• Compressed Air
• Low-Pressure Steam
• Fire Sprinkler Systems
For more information, see Table 1.1 Approved
Applications on Page 6.
1.1.1 Approvals and certifications
• IAPMO PS 117
• ICC LC1002
• TSSA
• UL 213 and ULC/SRD C213
• FM Class 1920
• Cal Fire
• Marine Approvals - ABS, LR, GL, DNV
• CRN #0A14541.5
1.1.2 Codes
• ASME B31, 31.1, 31.3, 31.9
• ICC International Plumbing Code
• ICC International Mechanical Code
• IAPMO Uniform Plumbing Code
• IAPMO Uniform Mechanical Code
• PHCC National standard plumbing code
• NFPA 13, 13D and 13R
1.2 Viega MegaPressG
Viega MegaPressG ½" to 2" fittings have a factory-installed
HNBR sealing element suitable for the following applications.
• Natural Gas
• Liquid Propane Gas
• Diesel Fuel
For more information, see Table 1.1 Approved
Applications on Page 6.
1.2.1 Approvals and certifications
Viega MegaPressG fittings have been listed for use
in schedule 40 fuel gas piping systems in above- and
below-ground applications by CSA.
• CSA LC-4
• ICC-ES PMG1036
• IAPMO/UPC
• Marine Approvals – ABS, LR, GL
• CRN #0A14541.5
1.2.2 Codes
The major codes and standards regulating fuel gas
piping systems include:
• NFPA 54/Z223.1 National Fuel Gas Code
• ICC International Mechanical Code
• IAPMO Uniform Plumbing Code
• NFPA 58 Liquefied Petroleum Gas Code
• NFPA 30 Flammable and Combustible Liquids Code
• NFPA 30A Code for Motor Fuel Dispensing Facilities
and Repair Garages
• NFPA 31 Standard for the Installation of Oil-Burning
Equipment
ASTM A53 schedule 40 pipe is permitted for fuel gas piping
systems in the National Fuel Gas Code (NFPA 54), the
International Fuel Gas Code or the Uniform Plumbing Code.
Note: All systems must be installed per local code requirements.
1.3 Fitting description
Viega MegaPress fittings are constructed of carbon
steel with a corrosion-resistant zinc/nickel coating.
Viega MegaPress fittings contain a stainless steel grip
ring and 304 stainless steel separator ring as shown
in Figure 1.1. The grip ring is a 420 stainless steel ring
with bidirectional teeth that grip the pipe and ensure
that the fitting is locked securely to the piping.
The 304 stainless steel separator ring ensures that the
sealing element and grip ring perform at maximum
capacity by providing a positive physical separation.
Press jaws and actuator rings are available for various
dimensions. Their constant compression produces a
positive, nondetachable, mechanical joint.
Sealing
Element
Stainless Steel
Grip Ring
304 Stainless Steel
Separator Ring
Figure 1.1