Caleffi 502720A Automatic Air VentCaleffi 502720A, an Automatic Air Vent 1 4" NPT Male with check, is engineered to remove trapped air from hydronic systems efficiently. Its compact brass body fits tight spaces in boilers, radiant heating systems, and chilled water loops. The durable brass construction resists corrosion and high temperatures, delivering long service life in hot water and glycol environments. Featuring a built in check valve to prevent backflow and water hammer, this

this hot surface igniter delivers reliable ignition and long-lasting performance in busy commercial settings

Ports are 1/8 in NPT

offering dependable electrical performance under demanding workloads and easy integration as an electrical component in existing infrastructure

it stands up to regular heating cycles and demanding schedules

ASCO AH2E112S4 Motorized Valve Actuator is designed for precise valve control in boilers

Impeller Cap Screw

This Water Heater Gas Temperature Control Kit is designed for natural gas systems and is compatible with AO Smith models GS6

Durable construction for steady performance across seasons

Trusted for OE-grade quality and consistent performance

or horizontal installation

brass body

with a visible red spring for quick identification