Brochure

Gastite Division, Titeflex Corporation
1116 Vaughn Parkway / Portland, TN 37148
800.662.0208 / www.gastite.com / [e-mail]
63
April 2015
Section 4: Installation Practices
4.7 Manifold
Manifolds are installed where multiple runs are made from a common location in a parallel arrangement. e manifold may
be manufactured from a one-piece malleable iron or brass casting (Fig. 4-83), a welded fabrication of steel sub-components
or an assembly of approved, malleable iron tees and short nipples (Fig. 4-84). Manifolds must be rigidly installed. is can
be achieved through the use of a mounted manifold bracket or by rigidly piping into a non-movable gas-piping component.
Depending on the location and available space, different mounting arrangements are permitted. A manifold may be mounted
in any orientation on the surface of an interior wall, between open floor joists, in attic spaces, crawl spaces, within a partition
wall, or inside an enclosure. A manifold assembly without a regulator can be concealed.
e FlashShield™ CSST Capacity Tables include losses for four 90° bends and two end fittings. Tubing runs with a larger
number of bends and/or fittings shall be increased by an equivalent length of tubing to the following equation: L=1.3n where
L is additional length of tubing and n is the number of additional fittings and/or bends. Each port of a manifold can be taken
as an additional fitting. For example: the tube running from the last port of a 3-port manifold should have 3.9 feet (3 ports/
fittings x 1.3) added to the run length for the purpose of sizing. is method is applicable for all manifolds whose ports are
equal or greater in size than the pipe connected to the corresponding port.
e installation of manifold assemblies using a pounds-to-inches regulator must be in accordance with all local codes, and
the following guidelines:
a) A manifold assembly directly integrating a pounds-to-inches regulator shall be installed in an accessible location so that
the regulator can be inspected, maintained and serviced if repair or replacement is required.
b) For manifold systems that use a pounds-to-inches regulator installed behind an access panel, all tubing penetrations in the
cabinet should be sealed, caulked or grommeted. e cabinet must be ventilated through the panel/door and not into a
wall space.
c) Open face cabinets (Fig. 4-85), which open on to the normal room environment, may be
utilized without the need for ventilation or penetration sealing requirements.
Fig. 4-83
Fig. 4-84
Fig. 4-85