About 900 1-inch 140X-9 temperature and pressure relief valves, made in the United States by Watts Regulator Co. of North Andover, Mass., because the relief valve can fail to reduce pressure, posing a ...

The new M-series metal seat ball valves from A-T Controls are engineered with specially coated matched balls and seats to stand up to high temperatures, high pressures, and abrasive materials ...

These automatic room temp-erature control valves balance low-pressure steam or hot-water systems and control the room temperature within ±1°F, says the manufacturer. The valves have a “memory disc,” ...

What lurks beneath the surface? What is underneath, where eyes cannot see? Is it something valuable? Is it something old? Is it some treasure or something frightening to behold? These are common ...