Installation Guide

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HOME-FLEX Underground® System Design and
Installation Guide
Chapter 1: Introduction
1.1 Introduction...........................................................1
1.2 User Warnings.........................................................2
1.3 Limitations of Manual..................................................2
1.4 Applicable Codes and Standards .......................................3
1.5 Prohibited Installation Practices ........................................3
Chapter 2: Description of System Components
2.1 Gas Pipe ..............................................................4
2.2 Fittings ...............................................................5
2.3 Transition Fittings .....................................................8
2.4 Anodeless Service Riser ................................................8
Chapter 3: System Conguration and Sizing
3.1 Conguration .........................................................10
3.2 Reference Data for Proper Sizing .......................................11
3.3 Sizing Methods and Examples..........................................11
Low Pressure (Less than or equal to 2.0 PSI Natural Gas).............11
Low Pressure (Less than or equal to 2.0 PSI) LP Gas .................11
Elevated Pressure (10 PSI ) LP Gas ..................................12
Chapter 4: Installation Practices
4.1 Installation Practices and Guidelines....................................14
4.2 Trenching .............................................................15
4.3 Fitting Assembly Overview.............................................16
4.4 Pressure and Leak Testing ..............................................18
Troubleshooting Fitting Assembly and Correcting Leaks ............18
Chapter 5: Sizing/Capacity Tables
5.1 Fitting Adjustment Values for Determining Run Length ..................21
Less than 2 PSI with 0.3 in. w.c. drop................................22
5.2 Natural Gas Sizing Tables...............................................22
Less than 2 PSI with 0.5 in. w.c. drop................................23
2 PSI with 1 PSI drop...............................................24
Less than 11 in. w.c. with 0.5 in. w.c. drop...........................25
5.3 Liquid Petroleum (LP) Gas Sizing Tables.................................25
2 PSI with 1 PSI drop...............................................26
10 PSI with 1 PSI drop .............................................27