Gas furnace piping, sediment trap, dirt leg, drip leg,

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Gas furnace piping best practices.

Carter Stanfield AHRI fundamentals of HVACR
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OK - try again9.6.1.1 Connectors and tubing shall be installed to be protected against physical and thermal damage.
9.6.1(5) CSST shall not be routed directly into a metallic appliance enclosure where the appliance is connected to a metallic vent that terminates above the roofline.
9.6.1.2 “… shall not be installed through an opening in an appliance housing, cabinet, or casing unless the tubing or connector is protected against damage.
9.6.5 “Each appliance connected to a piping system shall have an accessible, approved manual shutoff valve…”
9.6.5.1 (A) Where a connector is used the vale shall be installed upstream of the connector. A union or flanged connector shall be provided downstream from the valve…”
9.6.8 “…a sediment trap shall be installed downstream of the appliance shutoff valve as close to the inlet of the appliance as practical…”
ICC Gas Code
409.5.1 The shutoff valve will be located in the same room as the appliance. The shutoff valve will be within 6 feet of the appliance.
411.1 (3) “…semi rigid metallic tubing shall not enter a motor operated appliance through an unprotected knockout opening.”
411.1.3.3 Connectors shall not be concealed within or extended through walls, floors, partitions, ceilings, or appliance housings.
International Residential Code
G 2414.5.2 Copper and brass copper alloy tubing shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet of gas (0.7 milligrams per 100 liters).
G2422.1.4 A union fitting shall be provided for appliances connected by rigid metallic pipe. Such unions shall be accessible and located within 6 feet (1829 mm) of the appliance.

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