Installation Instructions

Configuration
Prior to piping installation, refer to building
plans or prepare a sketch showing the
l
ocation of the appliances, the various
appliance load demands, point of delivery
(location of gas meter or second stage LP
regulator), and possible piping routes.
Appliance load demand data can be
obtained from the manufacturers name-
plate located on each appliance, or
provided to the system designer by the
builder/contractor.
a) Determine the local piping
restrictions prior to installing the
flexible gas piping. Confirm that the
local administrative authority has
accepted the use of flexible gas
piping. Corrugated Stainless Steel
Tubing has been accepted by most
major code bodies, but local or
state adoption of these codes often
lags behind. Check with the local
administrative authority.
b) Determine metered (supply) pressure.
Natural Gas:
• Standard low-pressure supply throughout the USA and Canada is usually 6-7 inches water
column (also designated as 1/4 PSI or 4 ounces).
• Higher pressure supply such as 14 inches w.c. (1/2 PSI) and 2 PSI provide significant CSST
siz
e reduction. Check with the local gas utility for the availability of elevated pressure.
Propane (Liquefied P
etroleum Gas):
• LP is typically supplied within residential buildings at 11 inches w.c. This pressure is set at the
second stage regulator
.
• Elevated pressure settings from 14 inches w.c. to 2 PSI and 5 PSI also provide CSST size
reductions. Check with the propane gas supplier for available pressure.
c) Deter
mine the total capacity needed f
or all appliances
.
CFH/BTUH equiv
alents f
or natur
al gas
or propane flow can be obtained from the local gas utility or propane supplier. The capacity
tables within this guide or any approved CSST tables should be used to determine pipe sizing
needed to meet BTUH input load requirements
.
• For natural gas with a specific gravity of 0.60, one cubic foot per hour (1 CFH) is
approximately 1,000 BTUH.
• For propane gas with a specific gravity 1.52, one cubic foot per hour (1 CFH) is
approximately 2,500 BTUH.
7
3.0 System Configuration