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

The Watts Air Vent: One Port is a vertical-discharge air vent with a brass body, designed for water systems. It features a 1 in MNPT top port and a bottom port, with a maximum pressure of 150 psi and a maximum…

SKU 3G-OTH-70088

Also listed as: FV4M11 · FV 4M1 1 · FV-4M1-1

Brand
Watts
Item
Air Vent: One Port, Top Port, 1 in MNPT, For Water, Brass Body, 150 psi Max.
Category
Vertical-Discharge Air Vents
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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- 1
Type
Top Port, For Water, Brass Body, Bottom
MNPT
1 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 with a brass body, designed for water systems. It features a 1 in MNPT top port and a bottom port, with a maximum pressure of 150 psi and a maximum temperature of 240°F. This model, manufacturer part number FV-4M1-1, is a single-port unit for releasing trapped air.

Frequently Asked Questions

What is the Watts FV-4M1-1 air vent used for?

The Watts FV-4M1-1 air vent is used to automatically release trapped air from water systems, preventing air locks and improving system efficiency. It is commonly installed on hydronic heating and cooling systems, boilers, and piping networks where air accumulation can reduce performance.

What are the specifications of the Watts FV-4M1-1 air vent?

The Watts FV-4M1-1 is a vertical-discharge air vent with a brass body. It has a 1 in MNPT top port and a bottom port, rated for water at a maximum pressure of 150 psi and a maximum temperature of 240°F. This single-port model is designed for releasing trapped air in water systems.

Where to buy the Watts FV-4M1-1 air vent worldwide?

You can source the Watts FV-4M1-1 air vent worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this Watts model.

How to install the Watts FV-4M1-1 air vent?

Install the Watts FV-4M1-1 air vent at the highest point of the water system where air collects. Use thread sealant on the 1 in MNPT connection and tighten securely. Ensure the vent is oriented vertically for proper discharge. Follow local plumbing codes and the manufacturer's instructions for safe operation.

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

Cross-referenced by specification & description
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Air Vent: One Port, Top Port, 3/4 in MNPT, For Water, Brass Body, 150 psi Max., 250°F Max., Bottom (MPN 78)
BELL & GOSSETT
Air Vent: One Port, Top Port, 3/4 in MNPT, For Water, Brass Body, 150 psi Max., 250°F Max., Bottom (MPN 78)
Air Vent: One Port, Top Port, 1/8 in FNPT, For Water, Brass Body, 75 psi Max., 240°F Max., Bottom (MPN 113001)
BELL & GOSSETT
Air Vent: One Port, Top Port, 1/8 in FNPT, For Water, Brass Body, 75 psi Max., 240°F Max., Bottom (MPN 113001)

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