The Spirovent® Air Eliminators, using our patented Spirotube® coalescing medium, "scrub" the air from the system fluid and allows it to break free in a low velocity, low turbulence removal chamber. Simple to install with a straight in-line full flow design it is available in the VJR, VJS, and VJV Junior Series for residential and light commercial applications from 3/4 ft to 2 in pipe size. Solid brass construction, integral patented air release mechanism and a 20 year limited warranty. Models are available in NPT (VJR), sweat (VJS), horizontal (VJR / VJS), and vertical (VJV) configurations. Standard models rated for 150 psig and 270 deg F and solar (HT) models to 360 deg F. SPIROTHERM® Spirovent® Microbubble™ Air Eliminator, Series: Junior VJR, 1 in Nominal, FNPT, 150 psig Working, 270 deg F, Brass, 2.6 in Dia x 3.5 in W x 7 in H, Domestic