Hoffman Specialty 401458 Model 43 Steam Vent 1/4″ 6 PSI Max

Description

Hoffman Specialty 401458 Model 43 Steam Vent Overview

The Hoffman Specialty Model 43 Steam Vent (SKU 401458) is a dependable automatic air vent engineered for one-pipe and two-pipe steam heating systems. Designed to efficiently release trapped air from radiators and steam mains, this vent helps maintain optimal system performance by allowing steam to fill the heating element quickly while preventing air locks that reduce efficiency and comfort.

Key Features

• Model 43 automatic steam air vent for residential and light commercial steam heating systems
• 1/4″ NPT connection for straightforward installation on standard radiator air vent tappings
• Rated for a maximum operating pressure of 6 PSI, suitable for low-pressure steam systems
• Automatically opens to vent air when steam is absent and closes when steam arrives at the vent
• Durable construction from Hoffman Specialty, a trusted name in steam and hydronic system components
• Compact design fits a wide range of cast iron and steel radiators

Application

The Hoffman Specialty 401458 is ideal for use on steam radiators, convectors, and unit heaters in low-pressure steam heating systems. Proper air venting is critical to system balance — ensuring each radiator heats evenly and the boiler operates at peak efficiency. The Model 43 is a go-to replacement vent for aging steam systems in residential buildings, apartments, and light commercial facilities.

Specifications

• SKU: 401458
• Model: 43
• Connection Size: 1/4″ NPT
• Maximum Operating Pressure: 6 PSI
• Application: Low-pressure steam heating systems
• Brand: Hoffman Specialty (Xylem)