Integrated pressure relief valve automatically releases excess pressure to prevent tank damage and ensure in hydronic systems. Triple protection devise safeguards your investment, providing reliable operation in air-to-water heat pump systems. Built-in automatic vent effectively removes trapped , maintaining optimal heat transfer and preventing circulation issues in floor heating circuits. 1-inch NPT connections ensure adequate flow capacity for emergency pressure release, allowing for rapid pressure reduction in critical situations. Constructed from heavy-wall brass, this assembly withstands continuous pressure cycling and high temperatures, ensuring long-term reliability in demanding heating applications., Manufacturer: OTENG