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Small brass automatic air vent with 1/8 inch thread

Legend Valve

Legend Valve 110-331 1/8" T-70 Automatic Hot Water Air Vent

SKU CH-PVVH-3J59X

Automatically vents air from hot-water systems through a 1/8-inch T-70 connection

  • Automatically removes trapped air from hot water systems
  • 1/8 inch T-70 connection fits standard plumbing installations
  • New condition ensures reliable performance from first use
  • Legend Valve brand recognised for plumbing component quality
  • California Proposition 65 warning indicates chemical safety awareness

Automatic Hot Water Air Vent

The Legend Valve 110-331 is a 1/8" T-70 automatic air vent designed for hot water systems. It removes trapped air to maintain efficient circulation in hydronic heating installations. Plumbing professionals and facility managers use it to prevent air locks that reduce heat output.

Thermals, Noise and Power

The vent operates passively using system pressure and temperature, so it draws no electrical power and produces no fan noise. Its T-70 rating indicates suitability for hot water applications up to the specified temperature limit. The brass construction resists corrosion under normal operating conditions.

Fit and Function

The 1/8" male thread connects directly to compatible boiler tappings, radiator ports or distribution piping without additional fittings. Automatic operation frees maintenance staff from manual bleeding tasks. Buyers needing larger connection sizes or higher pressure ratings should verify specifications before purchase. California Proposition 65 warnings apply to this product.

Highlights

  • Automatically removes trapped air from hot water systems
  • 1/8 inch T-70 connection fits standard plumbing installations
  • New condition ensures reliable performance from first use
  • Legend Valve brand recognised for plumbing component quality
  • California Proposition 65 warning indicates chemical safety awareness

Specifications

BrandLEGEND VALVE

Questions about this item

How is the 1/8" T-70 air vent installed and what step is often missed?

Thread the 1/8" connection into the hot water system port using appropriate sealant; the step often missed is orienting the vent upright so the automatic float mechanism can release trapped air correctly.

What maintenance or replacement will the T-70 automatic air vent need later?

The automatic float mechanism may require cleaning if debris accumulates, and the vent should be replaced if it fails to purge air or begins leaking from the 1/8" connection over time.

What limit appears first on the T-70 air vent under sustained hot water use?

The vent is rated for hot water service; sustained high-temperature operation may accelerate wear on the internal float seal, which is the first component to show degradation.

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