Installation Guide

ManualsBrandsUnbranded ManualsOther Accessories4 in. x 9 in. CSST Striker Plate

• For natural gas with a specic gravity of 0.60, one cubic foot per hour (1

CFH) is approximately 1,000 BTUH.

• For LP gas with a specic gravity of 1.52, one cubic foot per hour (1 CFH)

is approximately 2,500 BTUH.

For any given system and its load requirements, there are several piping system designs

available to the installer using HOME-FLEX® tubing. The sections below will outline several

demand scenarios and the dierent system options open to the installer. It would be impos-

sible to outline all the possible installation methods. It is the installer’s responsibility to use

the information supplied here to determine the best routing solution, using these examples

as a guide.

Low Pressure Systems

In low pressure systems, there are two installation options: series layouts where a main run

from the gas source splits to each appliance, and parallel layouts where the main run from

the gas source leads to a central distribution manifold from which individual runs service the

appliances.

Low Pressure Series Systems

Series systems are the most commonly used layout for black steel pipe installations with low

pressure supplies. In series

layouts, a main run from

the gas source is branched

with tees to each appli-

ance. The service pressure

downstream of the meter

is typically less than ½ PSI.

It is important to consider

the minimum pressure

supplied to any given

appliance in a series lay-

out. Most natural gas

appliances require a

minimum of 4" w.c. pres-

sure, while LP appliances

require a minimum of 10"

w.c. pressure. Local code

restrictions may dictate allowable pressure drop along any particular run.

Low Pressure Parallel Systems

Parallel systems have a central distribution manifold with branch runs to the appliances.

Typically, a main supply line is run from the gas supply to a manifold and "home runs" are

Gas

Meter

Water

Heater

25,000 BTUH

Range Oven

40,000 BTUH

Low Pressure

(5 - 7" w.c.)

Figure 3.1 A low pressure series layout

Gas