VECTORFLEX™ GAS LINE SYSTEM installation checklist
Corrugated Stainless Steel Tubing (CSST) has been design certified by the Canadian Standards Association in ANSI LC1 for use as a fuel gas piping system. VectorFlex has been tested as required for approval and is listed as an approved gas piping material in the National Fuel Gas Code-NFPA 54 & 58, Uniform Plumbing Code-IAPMO, and the International Fuel Gas Code-ICC.
Approval: Conditions and Requirements
A VectorFlex gas line system must be installed in accordance with all local building codes and the manufacturer’s instructions. The following checklist is to assist the local inspection authority to perform an inspection of a fuel gas piping system using corrugated stainless-steel tubing.
VectorFlex may only be installed by a Qualified Installer who has successfully completed the manufacturer’s Certification Training Program. A manufacturer’s certification card is required to purchase and install a VectorFlex gas line system.
Only the components provided or specified by the manufacturer (including strike protection) as part of the piping system are to be used in the installation.
A VectorFlex gas line routed in a location which is concealed, constrained and within 3 inches of a potential threat must be protected against damage using protection devices listed in the manufacturer’s Design and Installation Guide.
- Sizing of the VectorFlex gas line system must be performed using capacity tables found in the manufacturer’s Design and Installation Guide or other code approved CSST capacity tables.
- VectorFlex should not be connected to moveable appliances. Connections to moveable appliances such as ranges and clothes dryers, should be accomplished with a flexible appliance connector.
- VectorFlex systems must be pressure tested for leaks during rough construction in accordance with all local codes. In the absence of local requirements, test in accordance with NFPA 54, National Fuel Gas Code, which is 1-1/2 times the maximum working pressure but not less than 3 PSI. To subject the entire VectorFlex gas line system to a pressure test, the pressure regulators should be isolated or removed.
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- Regulators are suitable for multi-poise mounting. When using a vent-limiting device however, the regulator must be mounted in a horizontal upright position.
- A manifold assembly utilizing a pounds-to-inches regulator shall include a ball valve ahead of the regulator and installed in an accessible location so that the regulator can be inspected, maintained and serviced if repair or replacement is required.
- When installed outdoors, the external jacket shall remain intact as much as possible. Exposed portions of the stainless steel tubing shall be wrapped to provide protection from corrosive threats.
- For installations buried underground, under concrete/asphalt or embedded in concrete, the VectorFlex gas line system must be routed in a non-metallic watertight conduit which has an inside diameter at least 1/2 in. larger than the outside diameter of the tubing. Under concrete/ asphalt slab, sleeved VectorFlex line must be buried in accordance with all local codes. No mechanical joints are permitted within the conduit.
- Installation must be properly supported to not only keep the job professional and organized but also to prevent excess strain on the bends and fittings. Supports installed in addition to the practices outlined by Easyflex®, restrict the tubing and increases susceptibility to strike damage.
- Gas piping systems must be properly bonded to the structure’s electrical service. A qualified professional following the NEC approved methods as outlined in section 4.10 shall perform the bonding installation.
- VectorFlex gas line system must be physically separated from other continuous metallic systems in accordance with section 4.3 of this guide.