Spirax-Sarco 69843 13WS 3/4″ NPT Cast Iron Air Eliminator 150#

Description

Spirax-Sarco 13WS Cast Iron Air Eliminator — 3/4″ NPT, 150 PSI

The Spirax-Sarco 13WS is a dependable cast iron air eliminator engineered to purge entrained air and non-condensable gases from hydronic heating and steam systems. By continuously venting unwanted air, the 13WS protects system components, reduces noise, and ensures maximum heat transfer efficiency — keeping your hydronic loop running at peak performance.

Why Air Elimination Matters

Entrained air in hydronic systems causes corrosion, noisy pipe flow, reduced circulation efficiency, and uneven heat distribution. The Spirax-Sarco 13WS addresses these issues at the source, automatically releasing air while retaining system fluid — a critical component in any well-designed hydronic or steam installation.

Key Features

• Brand: Spirax-Sarco — a globally trusted name in steam and fluid control
• Model: 13WS air eliminator
• Connection size: 3/4″ NPT
• Body material: Cast iron for durability and long service life
• Pressure rating: 150 PSI (150#)
• Designed for hydronic heating and steam system applications
• Automatic air venting to maintain system efficiency
• Compact design for easy inline installation

Typical Applications

• Hydronic heating systems
• Hot water boiler loops
• Steam distribution systems
• Commercial and industrial HVAC piping systems

Product Specifications

• SKU: 69843
• Manufacturer: Spirax-Sarco
• Model Number: 13WS
• Connection Type: NPT (National Pipe Thread)
• Connection Size: 3/4″
• Body Material: Cast Iron
• Maximum Working Pressure: 150 PSI (150#)