Installation Guide

6
Description of System Components
2.4 Pressure Regulators
Pressure regulators are used in elevated pressure system installations (over 14 inches water
column, or ½ PSI) to reduce pressure to standard low pressure required for appliances.
Part No. Description
Maxitrol 325-3L
½" NPT 7-11" w.c. Gas Line
Pressure Regulator
(250,000 Btu/hr max)
Maxitrol 325-5AL
¾" NPT 7-11" w.c. Gas Line
Pressure Regulator
(425,000 Btu/hr max)
2.5 Manifolds
Manifolds allow for parallel installations of HOME-FLEX® tubing with runs to each appliance.
Manifolds are available with ½" or ¾" inlets and have four ½" or ¾" NPT outlets.
Part No. Description
11-050504 ½" x ½" x ½" Female NPT
11-070504 ¾" x ¾" x ½" Female NPT
11-100704 1" x 1" x ¾" Female NPT
2.6 Shut-o valves and Quick-Connect Devices
At pressures less than 1/2 PSI (3.45 kPa), manual shut-o valves (ball valves) must comply with
ANSI Z21.15 / CGA 9.1 Manually Operated Gas Valves for Appliances, Appliance Connector Valves
and Hose End Valves, or with ANSI/ASME B16.44 Manually Operated Metallic Gas Valves for Use
in Above Ground Piping Systems up to 5 PSI.
When operating at pressures at or exceeding 1/2 PSI, manual gas valves are to have a pressure
rating of at least 5 PSI (34.5 kPa) and must comply with ANSI/ASME B16.33 Manually Operated
Metallic Gas Valves for Use in Gas piping Systems Up to 125 Psig, or with IAS U.S. Requirement
No. 3-88 Manually Operated Gas Valve for Use in House Piping Systems, or with CGA 3.16 Lever
Operated Non-Lubricated Gas Shut-O Valves, or with CGA 3.11 Lever Operated Pressure Lubri-
cated Plug Type Gas Shut-O Valves, or with CGA CR91-002 Manually Operated Gas Valves for
Use on Gas Piping. Valves listed as complying with IAS U.S. Requirement 3-88 or CGA CR91-002
but not ASME B16.33 or CGA 3.11 are not to be installed outdoors.
Valves must be used in the following conditions:
a) Gas appliances must have an accessible ½ PSIG manual shut-o valve upstream of
connectors with a union to allow removal of appliance
b) An accessible manual gas shut-o valve is required upstream of each pressure
regulator on elevated pressure systems.
Part No. Description
HFSB-1515 ⁄" Female NPT Ball Valve
HFSB-2424 ½" Female NPT Ball Valve
HFSB-3434 ¾" Female NPT Ball Valve
HFSB-4444 1" Female NPT Ball Valve