Re: gas for dryer
Posted by Dale's Plumbing Service Inc LMP on March 17, 19100 at 20:43:50:
In response to Re: gas for dryer
: I need to run a stretch of gas line in my garage for
: a gas dryer. There is already gas in the garage for
: the central heat and the dryer is only located about
: six or seven feet away. The furnace is fed by black
: pipe coming into the garage with a shutoff valve
: to which is connected the flex tubing going to the
: furnace.

: My question is, if I connect a tee downstream of the
: valve and run a stretch of flex tubing over to the
: gas dryer (I'll add an additional shutoff valve
: just before going into the dryer) will I get enough
: flow rate for the furnace and the dryer to run
: properly? Or, should I put a tee in the black pipe
: and run black pipe over to the dryer followed by a
: shutoff valve just before the dryer?

: I appreciate any suggestions here.....

121 0.0 Material For Gas Piping
1210.1 All Pipe Used For The Installation, Extension, Alteration, Or Repair Of
Any Gas Piping Shall Be Standard Weight Wrought Iron Or Steel (Galvanized
Or Black) Or Yellow Brass (Containing Not More Than Seventy-Five (75) Percent
Copper). Approved Pe Pipe May Be Used In Exterior Buried Piping Systems.

1210.2 All Such Pipe Shall Be Either New, Or Shall Previously Have Been
Used For No Other Purpose Than Conveying Gas; It Shall Be In Good Condition
And Free From Internal Obstructions. Burred Ends Shall Be Reamed To The Full
Bore Of The Pipe.

1210.3 All Fittings Used In Connection With The Above Piping Shall Be Of
Malleable Iron, Yellow Brass (Containing Not More Than Seventy-Five (75)
Percent Copper), Or Approved Plastic Fittings.

1210.4 All Valves And Appurtenances Used In Connection With The
Above Piping Shall Be Of A Type Designed And Approved For Use With Fuel
An Accessible Shutoff Valve Of A Type Set Forth In Section
1211.13,Shall Be Installed In The Fuel Supply Piping Outside Of Each
Appliance And Ahead Of The Union Connection Thereto, And In Addition To
Any Valve On The Appliance. Shutoff Valves Shall Be Within Three (3) Feet
Of The Appliance. Shutoff Valves May Be Located Immediately Adjacent
To And Inside Or Under An Appliance When Placed In An Accessible And
Protected Location And When Such Appliance May Be Removed Without Removal
Of The Valve. Shutoff Valves May Be Accessibly Located Inside Wall
Heaters And Wall Furnaces Listed For Recessed Installation Where Necessary
Maintenance Can Be Performed Without Removal Of The Shutoff Valve.
1) Listed Metal Appliance Connectors Shall Have An Overall Length
Of Not To Exceed Three (3) Feet Except A Range Or Dryer Connector,
Which May Not Exceed Six (6) Feet .
(2) No Part Of Such Connector Shall Be Concealed Within Or Extended
Through Any Wall, Floor, Partition, Or Appliance Housing
Demand In
Appliance Btu/H Watts/H
Barbecue (Residential).. 50,000 14,050
Bunsen Burner................ 3,000 879
Domestic Clothesdryer........ 35,000 10,255 35,0132
Domestic Gas Range......... 65,000 19,045
Domestic Recessed Oven Section........ 25,000 7,325
Domestic Recessed Top Burner Section......... 40,000 11,720
Fireplace Log Lighter (Commercial)........ 50,000 14,650
Fireplace Log Lighter (Residential).......... 25,000 7,325
Gas Engines (Per Horsepower)........... 10,000 2,930
Gas Refrigerator.................. 3,000 879
Mobile Homes (See Appendix E)
Steam Boilers(Per Horsepower)................ 50,000 14,650
Storage Water Heater
Up To 30 Gallon (114l)....................... 30,000 8,790
Storage Water Heater
40 (151 L) To 50 Gallon (189 L) Tank... 50,000 14,650

Table 12-2
Support Of Piping

Size Of Pipe
Table 12-3 Gas Meter
Size Of Gas Piping
Maximum Delivery Capacity Of Cubic Feet Of Gas Per Hour Of Ips Pipe Carrying
Range Natural Gas Of 0.60 Specific Gravity Based On Pressure Drop Of 0.5 Inch
Water Column

Pipe Size Length In Feet
Feet>>>> 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125'
1/2 174 119 96 82 73 66 61 56 53 50 44
3/4 363 249 200 171 152 138 127 118 111 104 93
1 684 470 377 323 286 259 239 222 208 197 174
1-1/4 1404 965 775 663 588 532 490 456 428 404 358
1217.0 Required Gas Piping Size
1217.1 Where The Maximum Demand Does Not Exceed Two Hundred Fifty
(250) Cubic Feet Per Hour (2 L/Sec.) And The Maximum Length Of Piping
Between The Meter And The Most Distant Outlet Is Not Over Two Hundred Fifty
(250) Feet (76 M), The Size Of Each Section And Each Outlet Of Any System Of Gas
Piping Shall Be Determined By Means Of Table 12-3. Other Systems Within
The Range Of Table 12-3 May Be Sized From That Table Or By Means Of The
Methods Set Forth In Section 1217.3.
1217.2 To Determine The Size Of Each Section Of Pipe In Any System Within
The Range Of Table 12-3, Proceed As Follows:
(1) Measure The Length Of The Pipe From The Gas Meter Location To The
Most Remote Outlet On The System.
(2) In Table 12-3 Select The Column Showing That Distance, Or The Next
Longer Distance If The Table Does Not Give The Exact Length.
(3) Starting At The Most Remote Outlet, Find In The Vertical Column Just
Selected The Gas Demand For That Outlet. If The Exact Figure Of Demand Is
Not Shown, Choose The Next Larger Figure Below In The Column.
(4) Opposite This Demand Figure, In The First Column At The Left In Table
12-3 Will Be Found The Correct Size Of Pipe.
Fuel Piping 1217.2 - 1218.4

(5) Using This Same Vertical Column, Proceed In A Similar Manner For
Each Section Of Pipe Serving This Outlet. For Each Section Of Pipe,
Determine The Total Gas Demand Supplied By That Section. Where Gas
Piping Sections Serve Both Heating And Cooling Equipment And The
Installation Prevents Both Units From Operating Simultaneously, Only The
Larger Of The Two Demand Loads Need Be Used In Sizing These Sections.
(6) Size Each Section Of Branch Piping Not Previously Sized By
Measuring The Distance From The Gas Meter Location To The Most Remote
Outlet In That Branch And Follow The Procedures Of Steps 2, 3, 4, And 5
Note: Size Branch Piping In The Order Of Their Distance From The Meter
Location, Beginning With The Most Distant Outlet Not Previously Sized.
1217.3 For Conditions Other Than Those Covered By Section 1217.1, Such As
Longer Runs Or Greater Gas Demands, The Size Of Each Gas Piping System Shall
Be Determined By Standard Engineering Methods Acceptable To The
Administrative Authority And Each Such System Shall Be So Designed That
The Total Pressure Drop Between The Meter Or Other Point Of Supply And Any
Outlet When Full Demand Is Being Supplied To All Outlets, Will At No Time
Exceed Five-Tenths (0.5) Inches (12.7 Mm) Water Column Pressure.
1217.4 Where The Gas Pressure May Be Higher Than Fourteen (14) Inches
(355.6 Mm) Or Lower Than Six (6) Inches Of Water Column, Or
When Diversity Demand Factors Are Used, The Design, Pipe, Sizing, Materials,
Location, And Use Of Such Systems First Shall Be Approved By The
Administrative Authority. Piping Systems Designed For Pressures Higher
Than The Serving Gas Supplier'S Standard Delivery Pressure Shall Have Prior
Verification From The Gas Supplier Of The Availability Of The Design Pressure.
Systems Using Undiluted Liquefied Petroleum Gas May Be Sized Using Table
12-7 For Eleven (11) Inches (279.4 Mm) Water Column And In Accordance With
The Provisions Of Sections 1217.1 And 1217.2.

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