【Automatic Air Release for Better Efficiency】The 400-4 Float Air Vent automatically removes trapped air from hydronic systems, preventing airlocks and ensuring smooth water circulation. Improves heating efficiency, reduces energy consumption, and helps maintain even heat distribution throughout your system. 【Durable Solid Brass Construction】Made from premium material for superior corrosion resistance and long-lasting durability. Withstands high temperatures and harsh environments without rusting, making it a dependable choice for both residential and commercial heating systems. .
eBay