Parker Hannifin Corporation
Parflex Division
Ravenna, Ohio
Bulletin No. 4660-PGP2T
45
Parflex
®
Flexible Gas Piping System
Design and Installation Guide
Section 4.0 Installation Practices
4.7 Manifold Stations
4.7.1 Configurations
• The manifold regulator and shut-off valves must be securely installed into a ventilated accessible
space to allow for inspection, service and replacement. An extra port must be included on the mani-
fold for system pressure testing.
• If the manifold regulator assembly is installed into a built-in enclosure, all tubing penetrations in the
cabinet must be sealed, caulked or grommeted. Ventilation of the cabinet must be through the access
panel and not into the wall space. A review of local building codes is recommended.
• Manifolds not attached directly to a regulator or shut-off valves can be located in a concealed location.
4.7.2 Allowable Locations
• Distribution manifolds are often used in parallel system layouts where the manifold is located close
to the appliance with the highest load. Approved manifolds include one-piece malleable iron or brass
castings, welded steel, or assemblies made from approved malleable iron tees and short nipples.
• The location of the manifold depends on space limitations, appliance locations, and code regulations.
• Common mounting configurations illustrated below include surface mounting to interior walls,
between open floor joists, between ceiling joists in attic spaces and within partition walls using a ven-
tilated enclosure.
Single 4-Port Manifold with Three Required Outlets and One
Plugged Outlet
Manifold Expansion Methods
(For Additional Appliances and Pressure Testing)
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