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Actual product may vary from photos.
The Spirotherm VJR100TM has been discontinued.
Please call us for a suitable alternate product.

(800) 865-5931

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The Spirovent Junior provides reliable automatic air release in the top of a hydronic system, allowing rapid filling and draining. When you use a Spirovent, no other air bleeders are needed. Use a Spirovent on every new hot- and/or chilled- water system for air related problems in existing systems. It's a simple retrofit. Just locate the Spirovent in the common piping at the boiler. This is the point where the water is the hottest. The Spirovent Junior comes in 3/4", 1", 1-1/4" , and 1-1/2" female-threaded sizes and is made of solid brass for long life. The 1" and 1-1/4" models are tapped at the bottom to accommodate a bladder type compression tank.

Piping Connections - Water
1 Inch(es)

Automatic type air vents are installed close to the boiler on a supply pipe common to the entire system. Manual air vents are installed at high points in the system, often on the outlet side of radiators.


In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.