BASO Y99AR-3 Pilot Tube

The BASO Y99AR-3 Pilot Tube is a 1/8-inch by 72-inch length of aluminum pilot gas tubing that carries gas from the gas control to the pilot burner on standing pilot gas-fired heating equipment. Made by BASO Gas Products, it is packed as a pilot tubing kit with four (4) 1/8-inch compression fittings, so the tube and the compression connections for a pilot line replacement arrive together. It is a pilot supply line only: it feeds the small pilot flame that lights the main burner and heats the thermocouple or thermopile, which is why a clean, unkinked line matters.

The BASO Y99AR series covers three common pilot tubing kits: the Y99AR-1 (1/4-inch by 60-inch with four 1/4-inch fittings), the Y99AR-2 (1/8-inch by 18-inch with two 1/8-inch fittings) and this Y99AR-3, the long 1/8-inch version. BASO literature also lists a Y99AR-3H described as a 1/8-inch by 72-inch aluminum pilot gas tube, the same size and length. Spare 1/8-inch compression fittings are sold separately by BASO in cartons of fifty. The Y99AR-3 is also the cross-reference for Utica-Dunkirk 43300201, a 1/8-inch by 24-inch pilot tube with fittings; because the Y99AR-3 ships at 72 inches, it is trimmed to the length the appliance needs.

Aluminum pilot tubing fails in predictable ways. A kinked or flattened section, a crushed ferrule or corrosion at a fitting restricts gas, and the result is a weak or lazy pilot flame, a pilot that will not stay lit or a gas smell at a connection. Before condemning the tube, clear the pilot orifice, check the thermocouple and confirm gas supply to the control. When replacing the line, match the original tube diameter and fitting style, cut square with a tubing cutter, remove burrs, make wide gradual bends, keep the tube clear of heat, moving parts and sharp edges, and use a fresh compression ferrule at each connection. Finish with a gas leak test. Installation belongs to a qualified gas technician working to local codes and the equipment manufacturer's instructions.

Key Benefits

• Complete kit: One 72-inch length of 1/8-inch aluminum tubing plus four 1/8-inch compression fittings in one package.
• Room to route and trim: The long 72-inch length covers extended runs and can be cut down for short pilot line replacements.
• Easy to work: Aluminum tubing bends and cuts with standard tubing tools, and its corrosion resistance suits a burner compartment.
• Clear identification: Matches BASO Y99AR-3 and the Y99AR-3H listing, and crosses to Utica-Dunkirk 43300201 for easy part lookups.

Common Questions

• What size is the Y99AR-3 and what is in the package? It is 1/8-inch aluminum pilot tubing, 72 inches long, packed with four 1/8-inch compression fittings.
• How does the Y99AR-3 differ from the Y99AR-1 and Y99AR-2? The Y99AR-1 is larger 1/4-inch tubing at 60 inches with 1/4-inch fittings, and the Y99AR-2 is 1/8-inch tubing at only 18 inches with two fittings. Pick the one that matches the original tube diameter and length.
• Can the Y99AR-3 replace Utica-Dunkirk 43300201? It is the listed cross for 43300201. That tube is 1/8-inch by 24 inches, so cut the Y99AR-3 to length and confirm the fitting style on the appliance.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.