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Honeywell Home V8043A1003/U 24 Vac 1/2 in Flare N.C. Zone Valve

Name: Honeywell Home V8043A1003/U 24 Vac 1/2 in Flare N.C. Zone Valve
Brand: Honeywell Home
SKU: HONE-V8043A1003/U
Price: 144.50 USD
Availability: InStock

Honeywell HomeSKU: HONE-V8043A1003/U

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Price:

$144.50

Stock:

Only 9 units left

Quantity:

Usually ships in 1–2 business days.

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Shipping details

Shipping weight: 2.4 lb
Box size: 5.1 × 4.9 × 3.75 in

Pipe Size	1/2 in.
Connection Type	Flare
Body Pattern	Two-way, Straight-through
Valve Type	Zone Valve
Valve Action	Spring return to close
Actuation	Two position
De-energized Position	Normally Closed
Manual Opener	Yes
Capacity (Cv)	3.5 Cv
Voltage	24 Vac; Power Consumption--7.7 VA
Current Draw	0.32A
Frequency	50 Hz; 60 Hz
Electrical Connections	18 in. leads
Timing	Nominal Open--15 sec
Close-off Pressure	20 psi
Static Pressure	125 psi
Fluid Temperature	50 F to 200 F
Ambient Temperature	125 F Maximum
Operating Humidity	5 to 95% relative humidity, non-condensing.
Materials (Body)	Brass
Materials (Stem)	Stainless Steel
Materials (Seat)	Brass
Materials (Packing)	EPDM rubber
Materials (Plug/Ball/Disc)	Buna-N (NBR) Rubber Ball
Application	Hydronic Control
Dimensions	4 in. high x 4 11/16 in. wide x 2 3/8 in. deep
UL	UL Listed: File MH11826
CSA	CSA Certified: File 1310

The V8043A1003 is a two-position hydronic zone valve from Resideo, the brand that carries the Honeywell Home line of residential heating controls. It pairs a motorized actuator with a 1/2-inch flare valve body to start and stop hot water flow to a single heating zone on a call from a thermostat or zone panel.

The valve is normally closed. It stays shut until the actuator is energized and returns to the closed position when power is removed, so a zone drops out on a power failure or a thermostat fault instead of running unattended. That is the safer default on a boiler loop feeding radiators, convectors, finned baseboard, or in-floor radiant tubing.

The 1/2-inch flare connections tie the valve into the supply piping, and the V8043A1003 handles supply water at operating pressures up to 300 psi.

The V8043 and V4043 series have been the reference zone valves in North American hydronic heating for decades, and most contractors still order them by the original Honeywell part number. The actuator head is field-replaceable, so a burned-out motor does not mean cutting the body out of the line.

Replacement head and motor for this valve

Brand: Honeywell Home
Manufacturer Part #: V8043A1003/U
Valve action: Normally closed
Voltage: 24 Vac
Connection size: 1/2 in
Connection type: Flare
Max operating pressure: 300 psi
Category: Zone Valves

Full Specifications

Valve Ball Material	Buna-N (NBR) Rubber
Approvals and Standards	UL Listed: File MH11826
Color	Brass
Includes	End switch enclosure, Manual Opener
Product Height	4 in, 102 mm
Product Length	2.38 in, 60 mm
Product Width	4.69 in, 118 mm
Warranty	5 years
Ambient Operating Temperature (Max)	125 °F, 52 °C
Connection Type	Flare
Differential pressure for close-off (Max)	20 psi, 138 kPa
Flow Coefficient	3.5 Cv; 3 Kvs
Media Temperature (Min)	50 °F, 10 °C
Media Temperature (Max)	200 °F, 93 °C
Static Pressure Rating	125 psi, 862 kPa
Valve Body Material	Brass
Valve Body Pattern	Two-way, Straight Through
Valve Plug Material	Buna-N (NBR) Rubber
Valve Seat Material	Brass
Valve Start Position	Closed
Valve Stem Material	Stainless Steel