Install Instructions

Viega IM-PFMB 1007
9
3. CODE COMPLIANCE
3.1 Plumbing Code
Compliance
(Parallel Systems)
The MANABLOC parallel water
distribution system meets the ASTM
F877, standard specification for
cross-linked polyethylene (PEX)
plastic hot and cold water distribution
system utilizing ViegaPEX tubing
meeting the requirements of the
ASTM F876, standard specification for
cross-linked polyethylene tubing.
The 2006 International Plumbing
Code® (IPC) and the 2006 Uniform
Plumbing Code™ (UPC) recognize
and list these ASTM standards within
their respective mandatory standards
and/or approved material sections.
The MANABLOC is IAPMO listed to
the UPC utilizing both 3/8" and 1/2"
PEX tubing sizes for distribution.
3.2 Sizing of Parallel Water
Distribution Systems
(MANABLOC)
Sizing of Parallel Water Distribution
Systems (MANABLOC) are addressed
in both the IPC and UPC 2006
plumbing codes.
In the IPC, section 604.5 Size of fixture
supply states, "The minimum size of
individual distribution line utilized in
gridded or parallel water distribution
systems shall be as shown in Table
604.5." This table includes 3/8", 1/2"
and 3/4" size tubing. In the UPC,
section 610.4 it states, "Listed parallel
water distribution systems shall be
installed in accordance with their
listing, but at no time shall any portion
of the system exceed the maximum
velocities allowed by the code." The
MANABLOC’s IAPMO UPC listing
says to install per the manufacturers
current installation instructions.
Therefore, these instructions shall
be used to size and install these
types of systems.
3.3 Valve Requirements for
Parallel Systems
The IPC and UPC codes address
valves in sections 604.10.3 Valves,
and 605.5 respectively, which allow
the use of manifold valves in parallel
systems in lieu of valves at the fixture,
as long as they are installed at the
manifold and are identified with the
fixture being supplied.