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Watts Air Vent: One Port, Top Port, 1/8 in MNPT, For Water, Brass Body, 150 psi Max. - Vertical-Discharge Air Vents
WattsVertical-Discharge Air Vents

Watts Air Vent: One Port, Top Port, 1/8 in MNPT, For Water, Brass Body, 150 psi Max.

The Watts 1/8 DUO-VENT NPT is a one-port, vertical-discharge air vent designed for water systems. It features a brass body with a 1/8 in MNPT top port and a maximum pressure rating of 150 psi and maximum temperature…

SKU 3G-OTH-69998

Also listed as: 18DUOVENTNPT · 1 8 DUO VENT NPT · 1-8-DUO-VENT-NPT

Brand
Watts
Item
Air Vent: One Port, Top Port, 1/8 in MNPT, For Water, Brass Body, 150 psi Max.
Category
Vertical-Discharge Air Vents
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Technical Specifications

Watts
Manufacturer Part Number
1/8 DUO-VENT NPT
Type
Top Port, For Water, Brass Body, Bottom
MNPT
1/8 in
Max.
150 psi
Product Type
Air Vent

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Watts Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Watts 1/8 DUO-VENT NPT is a one-port, vertical-discharge air vent designed for water systems. It features a brass body with a 1/8 in MNPT top port and a maximum pressure rating of 150 psi and maximum temperature of 240°F.

Frequently Asked Questions

What is the Watts 1/8 DUO-VENT NPT air vent used for?

The Watts 1/8 DUO-VENT NPT is a one-port, vertical-discharge air vent used to automatically release trapped air from water systems. It is commonly installed on hydronic heating loops, radiators, and hot water lines to prevent air locks and improve system efficiency.

What are the specifications of the Watts 1/8 DUO-VENT NPT?

The Watts 1/8 DUO-VENT NPT has a brass body with a 1/8 in MNPT top port. It is rated for a maximum pressure of 150 psi and a maximum temperature of 240°F. This air vent is designed for water systems and features a vertical-discharge configuration.

Where to buy the Watts 1/8 DUO-VENT NPT worldwide?

You can source the Watts 1/8 DUO-VENT NPT through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this Watts air vent.

How to install the Watts 1/8 DUO-VENT NPT air vent?

Install the Watts 1/8 DUO-VENT NPT by threading the 1/8 in MNPT top port into a compatible female fitting on the water system. Ensure the vent is oriented vertically for proper discharge. Apply thread sealant to prevent leaks and verify the system pressure does not exceed 150 psi.

Used in

Common applications for Watts
Industrial burner gas safety systems — Watts HF2000 filters with GF-series seal kits maintain clean, regulated gas supply to burner pilot and main flame controls
Commercial heating and boiler installations — Modular filter assemblies support preventive maintenance and component replacement without full system shutdown
Process gas delivery pipelines — DN25 through DN125 filter bodies accommodate varying flow rates and inlet pressures across manufacturing and chemical processes
Gas pressure regulation benches — Multi-stage Watts filter platforms integrate with pressure reducers and safety shutoff valves in test and calibration environments
Equipment retrofit and upgrade projects — Available connection sizes and seal kits enable adaptation of newer Watts components into legacy gas control systems
Planned maintenance and spare-parts inventory — Filter seal kits allow facilities to stock consumables in advance, reducing downtime during scheduled gas system servicing

Watts Products

3G Electric supplies Watts vertical-discharge air vents. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

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BELL & GOSSETT
Air Vent: One Port, Top Port, 1/2 in FNPT, For Water, Brass Body, 150 psi Max., 240°F Max., Bottom (MPN 87)
Air Vent: One Port, Top Port, 1/8 in MNPT, For Steam, Brass Body, 15 psi Max., 212°F Max., Bottom (MPN 013L-8011)
Danfoss
Air Vent: One Port, Top Port, 1/8 in MNPT, For Steam, Brass Body, 15 psi Max., 212°F Max., Bottom (MPN 013L-8011)

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