Fillable Printable Form 622-046-000

Form 622-046-000

F622-046-000 copper tubing gas line pre-inspection checklist 05 -08

Department of Labor and Industries

Factory Assembled Structures

PO Box 44430

Olympia WA 98504-4430

COPPER TUBING

GAS LINE

PRE-INSPECTION CHECKLIST

This checklist is designed to be generic in content and may not include all requirements for your particular installation. The

manufacturer’s installation instruction must be adhered to and available to the inspector at the time of the inspection. Be sure

you can answer YES to all of the questions before calling for inspection. Failure of the inspection will require a reinspection

fee to be paid.

REFERENCE COMPLIANCE

YesNo

3280.705(c)

Piping design:

1) Gas piping shall be designed for natural gas and acceptable

for LP gas.

3280.705(b) 2) All materials used shall be new and free from defects and

internal obstructions. Copper tubing shall be:

a) an annealed type, Grade K or L, conforming to the

Standard specification for SeamlessCopper water Tube

(ASTM B88); or

b) shall comply with the standard Specification for Seamless

Copper Tube for Air Conditioning and Refrigeration Field

Service (ASTM B280); and

c) shall be internally tinned.

NFPA 54 3.6.1 3) Bends shall be:

a) made only with bending equipment and procedures

especially intended for that purpose;

b) smooth and free from buckling, cracks, or other evidence

of mechanical damage;

c) not bent through an arc of more than 90 degrees; and

d) have an inside radius of not less than 6 times the outside

diameter of the pipe.

3280.705(b)(2) Fittings for copper tubing gas lines shall be of brass containing not

more than 75 percent copper.

3280.705(d)

Gas piping sizing:

1) Gas piping shall be sized so that the pressure drop to any

appliance inlet connection, when all appliances are in operation

at maximum capacity , is not more than 0.5 inch water column

based on a test or in accordance with table 3280.705(d).

3280.705(a)

2) The system shall be design for a pressure not exceeding 1/2

PSI and not less than 1/4 PSI.

F622-046-000 copper tubing gas line pre-inspection checklist 05 -08

3280.705(d)

Supply connection:

1) The natural gas supply connection shall be not less than the

size of the gas piping and not smaller than 3/4 inch nominal

pipe size.

3280.705(j) 2) Connections shall not be located beneath an exit door.

3280.705(l)(7)

3) Connection shall be rigidly anchored to a structural member

within 6 inches of the supply connection.

3280.705(I)

Joints shall not be located in any floor, wall, partition or similar

concealed space.

3280.705(l)(7)

Gas piping shall be supported by metal straps (not galvanized) that

have the equivalent protection of galvanized metal straps or

hangers at intervals of not more than 4 feet except where adequate

support and protection is provided by structural members.

3280.705(a)

All penetrations into the home shall be sealed.

3280.705(c) When piping is installed in more than one section, the crossover

connection shall:

3280.705(c)(1) 1) be readily accessible from the exterior of the home.

3280.705(c)(2) & (3) 2) be made by the use of either:

a) connector(s) listed for exterior use with a shutoff valve

upstream of the connection;

b) direct plumbing with a shutoff valve upstream of the

connection;

c) listed quick disconnect which shall be designed to

provide a positive seal on the supply side.

3280.809(d)

The gas line shall be bonded to the frame of the home by the

use of:

1) solderless type grounding terminal with a star washer bolted

to the chassis;

2) grounding strap attached to the gas piping; and

3) a bonding conductor of #8 copper wire.

3280.705(l)

Appliance connections shall:

1) have a shutoff valve installed at each appliance upstream of

the appliance connector, within 6 feet of a cooking appliance

and within 3 feet of any other appliance;

2) be made with either:

a) steel or wrought-iron pipe and a union;

b) internally tinned anneled copper tubing, Grade K or L;

c) steel tubing meeting ASTM A539-83; or

d) a listed appliance connector. Listed appliance connectors

shall be 6 feet or less in length for cooking appliances and

all others shall be 3 feet or less in length.

F622-046-000 copper tubing gas line pre-inspection checklist 05 -08

3280.705(l)(8)

Testing for leakage shall be performed as follows:

1) Before appliances are connected, the system shall withstand a

pressure of at least 3 PSI gauge for 10 minutes without losing

pressure.

2) After appliances are connected, the piping system shall be

pressurized to not less than 10 inches nor more than 14 inches

water column and the appliance connections tested for leakage

with soapy water or bubble solution.

A report shall be available showing that the gas line tests were

completed successfully. Any of the following shall be acceptable

to show that the tests were successfully completed"

1) A "Gas Piping Tests Affidavit"* completed, or:

2) The gas piping tests shall be witnessed by a gas company

representative who shall prepare a report, or:

3) Be witnessed by an L & I inspector.

Note: Use of CSST

The use of Gastite, TracPipe and Pro-Flex is allowed if the

installation is by a qualified installer and the installation meets the

requirements of the manufacture.

NOTE:

* Gas piping affidavits can be found on the FAS “form” page at

//www.lni.wa.gov/TradesLicensing/FAS/FormPub/forms or

contact the department for information on the affidavit format.