A.Y. McDonald is an American manufacturing company founded in 1856. It’s built a reputation for reliability and customer-focused manufacturing, supplying utilities, contractors, and municipalities with products that support essential services like water distribution and gas delivery.

The company’s product portfolio is broad, covering water works equipment, plumbing components, pumps, and natural gas distribution hardware used in residential, commercial, and industrial settings. In particular, A.Y. McDonald manufactures valves, meter bars, fittings, and accessories that play critical roles in underground utility systems and building infrastructure.

Its line of gas regulators reduce high incoming gas pressure—sometimes as high as 60 PSI—down to safe, usable levels for appliances, ensuring consistent flow and preventing damage or hazardous conditions. Their regulator offerings, including spring-loaded and pilot-loaded designs, are engineered for residential, commercial, and industrial applications and are capable of handling natural gas and LPG systems with pressures up to around 150 PSI.