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7.2 Rev. 3-08 Shaded area indicates changes MUELLER® GAS PHUSE® EXCESS FLOW VALVE SELECTION CHARTS Mueller AUTOSAFE® products are available with Gas-Phuse Excess Flow Valves in two sizes to meet the normal range of service requirements. The proper size of the Gas-Phuse valve will not interrupt normal service flow even at peak or surge flows, but will provide effective, automatic shut-off when excessive flow occurs. To select the correct Gas-Phuse valve, four factors must be considered. 1) length of service line; 2) main pressure; 3) size and type of service pipe; and 4) size of meter. In these charts,you can readily find your specific system design criteria and the Gas-Phuse valve to meet your requirements. 1. Select the chart that includes the approximate length of service line from main to meter. 2. In the left hand column of the chart find the minimum pressure in the main at the location of the Autosafe product. Read across to your service pipe size to determine which size GasPhuse valve to use* These Gas-Phuse sizing procedures will cover the normal range of single family dwelling service requirements. For multiple family dwellings or for service requirements not covered in the charts (such as service pipe of unusual length or size, meter sizes larger than those recommended, different specific gravity, etc.) contact Mueller Co. with specific information. Once you have determined the size of the Gas-Phuse valve you need, select the appropriate Autosafe product. SEE N O TE BELO W SEE N O TE BELO W NOTE: If your requirements fall within this light toned area, contact Mueller Co. Gas Products Division Customer Service Department. * The “250” Gas-Phuse excess flow device is rated at 250 cfh. ** The “500” Gas-Phuse excess flow device is rated at 500 cfh.

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MUELLER® AUTOSAFE® TEE WELD x WELD - SIZE 250 o Catalog number – H-18051 o Sizes* – 3/4" x 3/4" o Mueller GAS-PHUSE® Device size 250 o Forged steel body ASTM A105 o Steel completion cap AISI 12L14 o Bronze completion plug/Gas-Phuse Assembly o Weld inlet o Outlet prepared for butt weld same size as outlet and socket weld one size smaller than outlet o 1440** psig (9930 kPa) 7.3 Shaded area indicates change Rev. 6-10 H-18051 How to select equipment 1) Find chart on following pages containing desired combination of fitting and installation machine (shown in bold type at top of each page and chart). Note: for a given fitting there may be more than one machine and chart. 2) Under inlet size of fitting to be installed, select catalog number for type of control valve to be used. Options may include one or more of the following: H-10914 Bronze Gate Valve, H-17025 Control Chamber, H-10917 Slide Gate Valve, H-10918 Steel Ball Valve. 3) Under selected control valve, column lists equipment necessary for each operation on chosen size of fitting. Note: MAOP (Maximum Allowed Operating Pressure) provided for each operation must not be exceeded. MAOP may be different for each operation. Dimensions Size* of Autosafe Tee Dimensions 3/4" x 3/4" A 3-5/8" B 1-3/4" C 3/4" D 3/8" Replacement Parts Replacement Parts Completion Cap Stem/GAS-PHUSE Size* of Autosafe Tee 3/4" x 3/4" 504404 580722 C Gas-Phuse O-Ring A Completion Cap Gas-Phuse Assem D B *First size is size of inlet, second is size of outlet. **This is the maximum pressure of the fitting installed in the line at 100F for Class Locations 1, 2, 3 and 4 as defined in D.O.T./CFR TITLE 49 PART 192. It may be necessary to reduce the line pressure during the drilling, stopping or plugging operations to the maximum working pressure of the machine or its attachments. Refer to charts on following pages.

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