UNDERGROUND System Design and Installation Manual
Suggested Tools for Installation of HOME-FLEX Underground® Use to cut HOME-FLEX Underground® MDPE pipe to desired length. Ratcheting Pipe Cutter Use to tighten the fitting nut against the fitting flange. 2x Large Groove Joint or PVC Fitting Pliers Gloves Eye Protection For technical support call: 661-257-3923 or email: info@homeflex.
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.
Chapter 1: Introduction 1.1 Introduction HOME-FLEX® CSST and HOME-FLEX Underground® are two different systems with different uses and installation requirements. The tubing and fittings are not interchangeable. An installer must be aware of all of the HOME-FLEX Underground installation instructions and knowledgeable in all applicable plumbing and building codes.
Introduction Special attention must be given to the proper design, installation, testing and use of the gas piping. Sound engineering principles and practices must be exercised as well as diligent adherence to proper installation procedures. All installed systems must pass customary installation inspections by the administrative authority having jurisdiction prior to being placed in service. 1.
Applicable Codes and Standards local administrative authority will accept this. It is the ultimate responsibility of the installer to determine the suitability and acceptance of any building components including gas piping. Valencia Pipe Company, manufacturer of HOME-FLEX Underground® Gas Distribution System, assumes no responsibility for labor or material for installations made without prior determination of local code authority acceptance. 1.4 Applicable Codes and Standards • NFPA 54/ANSI Z223.
Chapter 2: Description of System Components 2.1 Gas Pipe Application Information For use in direct burial Natural Gas and Liquefied Petroleum (LP) Gas applications with Polyethylene (PE) gas pipelines. Technical Data Materials Pipe: Polyethylene (PE 2406/2708) Pressure Ratings Temperature Ratings Max Operating Pressure: 80 PSIG Operating Temperature Range: 0°F - 140°F Codes Standards NFPA 54/ANSI Z223.
Part No. Size (IPS) SDR Length 19-1211100 1¼" 11 100' 19-1211250 1¼" 11 250' 19-1211500 1¼" 11 500' 19-1511100 1½" 11 100' 19-1511250 1½" 11 250' 19-1511500 1½" 11 500' 19-2011100 2" 11 100' 19-2011250 2" 11 250' 19-2011500 2" 11 500' Check homeflexunderground.com for up-to-date product listings. 2.2 Fittings Application Information Gas compression fittings for use in Natural Gas and Liquefied Petroleum (LP) Gas applications with Polyethylene (PE) gas pipelines.
Part No. Description SDR 18-429-012 1¼" x 1¼" Coupling Fitting 11 18-429-015 1½" x 1½" Coupling Fitting 11 18-429-020 2" x 2" Coupling Fitting 11 18-406-005 ½" x ½" Elbow Fitting 9.3 18-406-007 ¾" x ¾" Elbow Fitting 11 18-406-010 1" x 1" Elbow Fitting 11 18-406-012 1¼" x 1¼" Elbow Fitting 11 18-406-015 1½" x 1½" Elbow Fitting 11 18-406-020 2" x 2" Elbow Fitting 11 18-401-005 ½" x ½" x ½" Tee Fitting 9.
Check homeflexunderground.com for up-to-date product listings. Elbow Fitting Dimensional Information Part Number Size (IPS) SDR 18-406-005 ½" 18-406-007 ¾" 18-406-010 18-406-012 18-406-050 18-406-020 Dimensions (in) Weight (lbs) S D L 9.3 0.47 1.81 2.72 0.20 11 0.51 2.13 3.23 0.33 1" 11 0.63 2.68 3.78 0.57 1¼" 11 0.79 3.23 4.41 0.99 1½" 11 0.83 3.78 4.84 1.48 2" 11 0.94 4.45 5.59 2.29 Check homeflexunderground.com for up-to-date product listings.
Part Number Size (IPS) SDR 18-406-010 1" 18-406-012 Dimensions (in) S D H G L Weight (lbs) 11 0.63 2.68 3.78 1.69 7.44 0.86 1¼" 11 0.79 3.23 4.41 1.89 8.78 1.46 18-406-015 1½" 11 0.83 3.78 4.88 2.17 9.65 2.16 18-406-020 2" 11 0.94 4.45 5.59 2.72 11.1 3.33 Check homeflexunderground.com for up-to-date product listings. 2.
Above Ground - Male Pipe Threads Under-ground Poly Part No. Description SDR 18-440-705 ½" IPS poly to ¾" MIP 9.3 18-440-007 ¾" IPS poly to ¾" MIP 11 18-440-010 1" IPS poly to 1" MIP 11 18-440-012 1¼" IPS poly to 1¼" MIP 11 18-440-015 1½" IPS poly to 1½" MIP 11 18-440-020 2" IPS poly to 2" MIP 11 Check homeflexunderground.com for up-to-date product listings.
Chapter 3: System Configuration and Sizing 3.1 Configuration Prior to piping installation, refer to building plans or prepare a sketch (this may be required by the local authority having jurisdiction for permitting purposes) showing the location of the appliances, the various appliance load demands, point of delivery (gas meter or 2nd stage LP regulator) and planned piping routes.
3.2 Reference Data for Proper Sizing Table 3.1 Pressure Conversion Factors Table 3.2 Fuel Gas Information ¼ PSI = 6.921 in. w.c. (appox. 7 in. w.c.) Gas Type BTU per Cubic Foot Specific Gravity ½ PSI = 13.842 in. w.c. (appox. 14 in. w.c.) Natural Gas 1000 0.6 LP Gas 2516 1.52 1 PSI = 27.684 in. w.c. (appox. 28 in. w.c.) 2 PSI = 55.368 in. w.c. (appox. 56 in. w.c.) 5 PSI = 138.42 in. w.c. (appox. 40 in. w.c.) 3.
System Configuration and Sizing Figure 3.2 2 PSI LP Gas Second-Stage Regulator To Garage, Outbuilding Or Appliance. Step 1 Call 811 at least 3 days prior to digging to have any underground utilities marked prior to digging. Step 2 Determine length of gas piping from connection point at second stage regulator outlet to riser outlet at the outbuilding or appliance. Include the distance required to connect the riser to the gas piping system near the meter.
Sizing Methods and Examples Step 3 Determine the number and type of HOME-FLEX Underground® fittings that are required in the system. Add the equivalent number of feet from Table 5.1 “Length to Add to Each Run for Each Fitting” on page 21 of this guide to the number of feet calculated above. Step 4 Use Table 5.7 on page 27 for 10 PSI elevated pressure LP Gas. Find the nearest length that is equal to or greater than the length calculated in step 3 above.
Chapter 4: Installation Practices 4.1 Installation Practices and Guidelines 1. HOME-FLEX Underground pipe and fittings must be installed in accordance with the Installation Practices & Guidelines outlined in this document as well as all local plumbing, mechanical, electrical and/or building codes and laws applicable at the locale where HOME-FLEX Underground is to be installed.
can be obtained from: catalog.nfpa.org/NFPA-54-C3324.aspx. Consult Section 4.4 (p. 18) for more information on pressure / leak tests and troubleshooting leaks. Nut Spacer Grip Ring O-Ring Main Body Nut Nut Nut Main Body Nut Nut Spacer Grip Ring O-Ring Spacer Grip Ring O-Ring Main Body Nut Figure 4.1 Fitting Re-assembly Diagrams 4.2 Trenching The minimum required depth for buried pipe will be specified by local code, and may range from as shallow as 12 inches to as deep as 24 inches.
Installation Practices after the pressure / leak test has been completed (see Section “4.4 Pressure and Leak Testing” on page 18) and the system has passed inspection by the local authority having jurisdiction (AHJ). 4.3 Fitting Assembly Overview HOME-FLEX Underground® IPS fittings are for use with IPS sized yellow poly gas pipe that has been approved for use with natural gas and propane.
Fitting Assembly Overview Step 4 Push stiffener into pipe Push the stiffener all the way into the pipe until the ridge is flush with the pipe end. This can be done by hand, or gently tapped in with a mallet if required. Step 5 Ensure 3 threads are showing on the fitting body The fitting is supplied in a ready-to-use position. You do not need to disassemble the fitting prior to use. Always ensure three threads are exposed on the central body of the fitting prior to use.
Installation Practices Step 8 Fitting is installed The fitting is now fully installed and ready for use. Note nut position relative to the flange on the central body. Check for system leaks prior to backfilling. WARNING! Improper installation or operation of the system may result in fire, explosion, or asphyxiation. Only the components provided or specified by Valencia Pipe Company for use with HOME-FLEX Underground® or as part of the fuel gas system are to be used in the installation. 4.
Pressure and Leak Testing Note: It is not necessary to remove the yellow nut completely off of the fitting. If this occurs refer to Figure 4.1 (p. 15).
Chapter 5: Sizing/Capacity Tables Fitting Adjustment Values for Determining Run Length Table 5.1 Length to Add to Each Run for Each Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Natural Gas Sizing Tables Table 5.2 Low Pressure Natural Gas (Less than 2 PSI with 0.3 in. w.c. drop) . . . . . . . . 22 Table 5.3 Low Pressure Natural Gas (Less than 2 PSI with 0.5 in. w.c. drop) . . . . . . . . 23 Table 5.4 Elevated Pressure Natural Gas (2 PSI with 1 PSI drop) . . . . . . . . . . . . . . . . .
Fitting Adjustment Values for Determining Run Length 5.1 Fitting Adjustment Values for Determining Run Length Table 5.1 Length to Add to Each Run for Each Fitting Fitting Coupler Elbow Tee (In Line Flow) Tee (line to branch flow) Pipe Size Add ½" 1.6' ¾" 2.2' 1" 2.9' 1¼" 3.5' 1½" 4.2' 2" 3.4' ½" 3.2' ¾" 4.4' 1" 5.7' 1¼" 6.9' 1½" 8.2' 2" 8.3' ½" 2.1' ¾" 2.9' 1" 3.7' 1¼" 4.5' 1½" 5.3' 2" 4.8' ½" 3.8' ¾" 5.3' 1" 6.8' 1¼" 8.4' 1½" 9.9' 2" 10.
Less than 2 PSI with 0.3 in. w.c. drop Sizing/Capacity Tables 5.2 Natural Gas Sizing Tables Table 5.2 Low Pressure Natural Gas (Less than 2 PSI with 0.3 in. w.c. drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Natural Gas by Length of Piping Run (Approximate 1,000 BTU/h Natural Gas per 1 CFH; based on a 0.6 specific gravity of gas) Inlet Pressure: Less than 2 PSI Pressure Drop: 0.3 in w.c. Run (ft.) IPS Pipe Size (SDR) ½" (SDR 9.
Less than 2 PSI with 0.5 in. w.c. drop Natural Gas Sizing Tables Table 5.3 Low Pressure Natural Gas (Less than 2 PSI with 0.5 in. w.c. drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Natural Gas by Length of Piping Run (Approximate 1,000 BTU/h Natural Gas per 1 CFH; based on a 0.6 specific gravity of gas) Inlet Pressure: Less than 2 PSI Pressure Drop: 0.5 in w.c. Run (ft.) IPS Pipe Size (SDR) ½" (SDR 9.
2 PSI with 1 PSI drop Sizing/Capacity Tables Table 5.4 Elevated Pressure Natural Gas (2 PSI with 1 PSI drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Natural Gas by Length of Piping Run (Approximate 1,000 BTU/h Natural Gas per 1 CFH; based on a 0.6 specific gravity of gas) Inlet Pressure: 2 PSI Pressure Drop: 1 PSI Run (ft.
Less than 11 in. w.c. with 0.5 in. w.c. drop Liquid Petroleum (LP) Gas Sizing Tables 5.3 Liquid Petroleum (LP) Gas Sizing Tables Table 5.5 Low Pressure LP (Less than 11 in. w.c. with 0.5 in. w.c. drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Liquid Propane (LP) Gas by Length of Piping Run (Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a 1.52 specific gravity of gas) Inlet Pressure: 11 in. w.c. Pressure Drop: 0.5 in. w.c.
2 PSI with 1 PSI drop Sizing/Capacity Tables Table 5.6 Elevated Pressure LP (2 PSI with 1 PSI drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Liquid Propane (LP) Gas by Length of Piping Run (Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a 1.52 specific gravity of gas) Inlet Pressure: 2 PSI Pressure Drop: 1 PSI Intended Use: PE Pipe Sizing Between 2 PSI Service Regulator and Line Pressure Regulator Run (ft.
10 PSI with 1 PSI drop Liquid Petroleum (LP) Gas Sizing Tables Table 5.7 Elevated Pressure Liquid Propane (LP) (10 PSI with 1 PSI drop) Maximum Capacity of HOME-FLEX Underground® Poly Pipe in BTU/h (British Thermal Units per Hour) of Liquid Propane (LP) Gas by Length of Piping Run (Approximate 2,520 BTU/h LP Gas per 1 CFH; based on a 1.
