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Watts Air Vent: One Port, Top Port, 3/4 in MNPT, For Water, Brass Body, 150 psi Max. - Vertical-Discharge Air Vents
WattsVertical-Discharge Air Vents

Watts Air Vent: One Port, Top Port, 3/4 in MNPT, For Water, Brass Body, 150 psi Max.

The Watts Air Vent: One Port is a vertical-discharge air vent designed for water systems. It features a brass body with a 3/4 in MNPT top port and a bottom connection, rated for a maximum pressure of 150 psi and a…

SKU 3G-OTH-70082

Also listed as: FV4M134 · FV 4M1 3 4 · FV-4M1-3-4

Brand
Watts
Item
Air Vent: One Port, Top Port, 3/4 in MNPT, For Water, Brass Body, 150 psi Max.
Category
Vertical-Discharge Air Vents
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Local availability & support

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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

Watts
Manufacturer Part Number
FV-4M1- 3/4
Type
Top Port, For Water, Brass Body, Bottom
MNPT
3/4 in
Max.
150 psi
Product Type
Air Vent

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

Product Description

The Watts Air Vent: One Port is a vertical-discharge air vent designed for water systems. It features a brass body with a 3/4 in MNPT top port and a bottom connection, rated for a maximum pressure of 150 psi and a maximum temperature of 240°F.

Frequently Asked Questions

What is the Watts FV-4M1-3/4 air vent used for?

The Watts FV-4M1-3/4 air vent is used to automatically release trapped air from water systems, such as hydronic heating or cooling loops. Its vertical-discharge design and brass body make it suitable for commercial and industrial applications where reliable air elimination is required to prevent air binding and corrosion.

What are the specifications of the Watts FV-4M1-3/4 air vent?

The Watts FV-4M1-3/4 air vent has a brass body with a 3/4 in MNPT top port and a bottom connection. It is rated for a maximum pressure of 150 psi and a maximum temperature of 240°F. This one-port, vertical-discharge model is designed specifically for water systems.

Where to buy the Watts FV-4M1-3/4 air vent worldwide?

3G Electric supplies the Watts FV-4M1-3/4 air vent worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source and deliver this Watts air vent to any international destination.

How to install the Watts FV-4M1-3/4 air vent?

Install the Watts FV-4M1-3/4 air vent by connecting the 3/4 in MNPT top port to a threaded fitting at the highest point of the water system. Ensure the vent is oriented vertically for proper operation. Apply thread sealant to the male threads and tighten securely. Follow local plumbing codes and the manufacturer's instructions for best results.

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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Cross-referenced by specification & description
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