|The safe and efficient way in which natural gas or propane is fed to outdoor appliances is through the use of a riser. A.Y. McDonald Mfg. Co. carries Chicago Fittings branded Risers, Couplings, and Male Adapters for the use of LP or natural gas applications. These product options bring efficiency to your project while also providing long-lasting results! For product inquiries and ordering information, feel free to contact us.