Stanbroil 3/8" X 18" Non-Whistle Flexible Flex Gas Line Kit with Brass Ends

3/8" OD x 1/4" ID 3/8" Male Flare x 1/2" Male NPT fitting end 3/8" Male Flare x 1/2" Female NPT Fitting Stainless Steel Flexible we have 12, 18, 24, 30, 36 and 48-inch sizes available. Tips for checking and addressing problem of whistling Flex Line Problems: 1) Used a whistle-free line with varying ridge sizes, which helps to eliminate noise. 2) Chosen a line with a wider diameter to minimize whistling by allowing the right amount of gas to flow to the burner at a lower rate of speed. 3) Taken care to avoid sharp 90-degree turns and/or kinks in the line during installation. Gas Pressure is Too High 1) When a high level of pressure is applied to a small opening, the result is a whistling sound. This is the mechanism at play when the line pressure in your fire pit gas installation is too high. 2) Since natural gas is typically transported at high pressures, a regulator is often required to mitigate this pressure before the gas reaches the burner (Keep in mind that this work should only be performed by a gas installation professional, since they have the know-how to size and install the proper regulator for your fire pit configuration). Pressure guidelines are as follows: Natural gas: Between 3.5” WC and 7” WC. Propane: 7” WC and 11” WC