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Honeywell Home V4043H1106 28mm 2-Port Motorised Zone Valve — Large Bore Central Heating Zone Control
Honeywell Home V4043H1106 28mm 2-Port Motorised Zone Valve — Large Bore Central Heating Zone Control
The Honeywell Home V4043H1106/U is a 28mm two-port motorised zone valve for domestic and light commercial central heating systems requiring larger-bore pipework — the 28mm version of the industry-standard V4043H series. Motor open and spring return, with a normally closed fail-safe position, a potential-free SPST end switch for boiler and pump control, and a replaceable powerhead that does not require draining the system. Suitable for use on main heating flow and return pipework, high-flow primary circuits, and larger domestic installations where 28mm pipework is specified. Manual lever for filling and draining. 1 metre heat-resistant flying lead. Maximum static pressure 8.6 bar; Kv value 8.6; fluid temperature +5°C to +88°C.
ℹ 22mm vs 28mm — When to use the 28mm valve
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
Features & Benefits
✔ Motor Open, Spring Return — Fail-Safe Closed
The V4043H uses a motor to open the valve and a return spring to close it. When the wiring centre calls for heat and sends power to the valve, the motor drives the valve open over approximately 12 seconds; when the call ends and power is removed, the return spring snaps the valve closed in about 5–6 seconds — no electrical power required to close. This normally closed, fail-safe design means that in the event of a power failure or wiring fault, the valve defaults to closed, preventing uncontrolled heating circulation.
✔ Potential-Free End Switch — Boiler & Pump Control
The potential-free (volt-free) auxiliary end switch closes as the valve reaches its fully open position. This switch signal is used to fire the boiler and/or start the circulating pump — ensuring the boiler only fires when at least one zone valve is fully open and water is circulating. This is the fundamental boiler interlock mechanism in S-plan and Y-plan wiring configurations. The end switch must be wired to the boiler's live connection (via the wiring centre) to achieve Part L-compliant boiler interlock. The 28mm body is suited to larger primary circuits, high-flow systems, and main heating flow and return pipework where greater Kv capacity is required.
✔ Replaceable Powerhead — No Drain-Down
The motor head (powerhead) can be removed and replaced without draining the heating system. The valve body remains in the pipework; the motorised head clips or screws on and off independently. If the motor fails — by far the most common V4043 failure — the entire valve does not need to be cut out of the pipework. The powerhead can be swapped in minutes with the system full and under pressure, making maintenance on a live system fast and cost-effective.
✔ Manual Lever — Filling and Draining
A manual lever on the valve body allows the valve to be held open manually when filling or draining the heating system — without requiring electrical power to the actuator. This is essential during commissioning (the system needs to circulate water for flushing and chemical treatment) and during drain-down for maintenance on other components. Push the lever to open manually; release to allow the return spring to close.
✔ Quiet Operation — 5W Power Consumption
The synchronous motor is designed for near-silent operation — the only noise during opening is a brief mechanical engagement, not a continuous motor whine. Once fully open, the motor stalls and the end switch holds the boiler on; there is no continuous motor running sound during the heating period. At only 5W power consumption, the valve adds negligible electrical load — far less than the boiler's control electronics.
✔ 28mm Compression — Industry Standard
Standard 28mm compression fittings — the V4043H is the most widely installed motorised zone valve in the UK and is the valve that all standard wiring centre diagrams, S-plan and Y-plan configurations, and installer training are based around. Being the default component in UK heating design means replacement availability is guaranteed and any qualified plumber or heating engineer will be able to install, wire, and commission it correctly without reference to unusual procedures.
Technical Specifications
| Manufacturer / Part No. | Honeywell Home (Resideo) — V4043H1106/U |
| Connection Size | 28mm compression |
| Number of Ports | 2-port (on/off) |
| De-energised State | Normally CLOSED (spring return) |
| Action | Motor open — spring return |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W |
| End Switch Type | SPST — potential-free |
| Opening Time | 12 seconds (nominal) |
| Closing Time | 5–6 seconds (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure (close-off) | 0.45 bar |
| Kv Value | 8.6 |
| Fluid Temperature Range | +5°C to +88°C |
| Max Ambient Temperature | +52°C |
| Electrical Connection | 1.0m heat-resistant flying lead, 6-core |
| Dimensions (H × W × D) | 98 × 117 × 60 mm |
| Flow Direction | As per arrow on valve body |
$59.05
Original: $168.71
-65%Honeywell Home V4043H1106 28mm 2-Port Motorised Zone Valve — Large Bore Central Heating Zone Control—
$168.71
$59.05More Images
Honeywell Home V4043H1106 28mm 2-Port Motorised Zone Valve — Large Bore Central Heating Zone Control
The Honeywell Home V4043H1106/U is a 28mm two-port motorised zone valve for domestic and light commercial central heating systems requiring larger-bore pipework — the 28mm version of the industry-standard V4043H series. Motor open and spring return, with a normally closed fail-safe position, a potential-free SPST end switch for boiler and pump control, and a replaceable powerhead that does not require draining the system. Suitable for use on main heating flow and return pipework, high-flow primary circuits, and larger domestic installations where 28mm pipework is specified. Manual lever for filling and draining. 1 metre heat-resistant flying lead. Maximum static pressure 8.6 bar; Kv value 8.6; fluid temperature +5°C to +88°C.
ℹ 22mm vs 28mm — When to use the 28mm valve
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
Features & Benefits
✔ Motor Open, Spring Return — Fail-Safe Closed
The V4043H uses a motor to open the valve and a return spring to close it. When the wiring centre calls for heat and sends power to the valve, the motor drives the valve open over approximately 12 seconds; when the call ends and power is removed, the return spring snaps the valve closed in about 5–6 seconds — no electrical power required to close. This normally closed, fail-safe design means that in the event of a power failure or wiring fault, the valve defaults to closed, preventing uncontrolled heating circulation.
✔ Potential-Free End Switch — Boiler & Pump Control
The potential-free (volt-free) auxiliary end switch closes as the valve reaches its fully open position. This switch signal is used to fire the boiler and/or start the circulating pump — ensuring the boiler only fires when at least one zone valve is fully open and water is circulating. This is the fundamental boiler interlock mechanism in S-plan and Y-plan wiring configurations. The end switch must be wired to the boiler's live connection (via the wiring centre) to achieve Part L-compliant boiler interlock. The 28mm body is suited to larger primary circuits, high-flow systems, and main heating flow and return pipework where greater Kv capacity is required.
✔ Replaceable Powerhead — No Drain-Down
The motor head (powerhead) can be removed and replaced without draining the heating system. The valve body remains in the pipework; the motorised head clips or screws on and off independently. If the motor fails — by far the most common V4043 failure — the entire valve does not need to be cut out of the pipework. The powerhead can be swapped in minutes with the system full and under pressure, making maintenance on a live system fast and cost-effective.
✔ Manual Lever — Filling and Draining
A manual lever on the valve body allows the valve to be held open manually when filling or draining the heating system — without requiring electrical power to the actuator. This is essential during commissioning (the system needs to circulate water for flushing and chemical treatment) and during drain-down for maintenance on other components. Push the lever to open manually; release to allow the return spring to close.
✔ Quiet Operation — 5W Power Consumption
The synchronous motor is designed for near-silent operation — the only noise during opening is a brief mechanical engagement, not a continuous motor whine. Once fully open, the motor stalls and the end switch holds the boiler on; there is no continuous motor running sound during the heating period. At only 5W power consumption, the valve adds negligible electrical load — far less than the boiler's control electronics.
✔ 28mm Compression — Industry Standard
Standard 28mm compression fittings — the V4043H is the most widely installed motorised zone valve in the UK and is the valve that all standard wiring centre diagrams, S-plan and Y-plan configurations, and installer training are based around. Being the default component in UK heating design means replacement availability is guaranteed and any qualified plumber or heating engineer will be able to install, wire, and commission it correctly without reference to unusual procedures.
Technical Specifications
| Manufacturer / Part No. | Honeywell Home (Resideo) — V4043H1106/U |
| Connection Size | 28mm compression |
| Number of Ports | 2-port (on/off) |
| De-energised State | Normally CLOSED (spring return) |
| Action | Motor open — spring return |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W |
| End Switch Type | SPST — potential-free |
| Opening Time | 12 seconds (nominal) |
| Closing Time | 5–6 seconds (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure (close-off) | 0.45 bar |
| Kv Value | 8.6 |
| Fluid Temperature Range | +5°C to +88°C |
| Max Ambient Temperature | +52°C |
| Electrical Connection | 1.0m heat-resistant flying lead, 6-core |
| Dimensions (H × W × D) | 98 × 117 × 60 mm |
| Flow Direction | As per arrow on valve body |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Honeywell Home V4043H1106/U is a 28mm two-port motorised zone valve for domestic and light commercial central heating systems requiring larger-bore pipework — the 28mm version of the industry-standard V4043H series. Motor open and spring return, with a normally closed fail-safe position, a potential-free SPST end switch for boiler and pump control, and a replaceable powerhead that does not require draining the system. Suitable for use on main heating flow and return pipework, high-flow primary circuits, and larger domestic installations where 28mm pipework is specified. Manual lever for filling and draining. 1 metre heat-resistant flying lead. Maximum static pressure 8.6 bar; Kv value 8.6; fluid temperature +5°C to +88°C.
ℹ 22mm vs 28mm — When to use the 28mm valve
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
The 22mm V4043H1056 is specified for the majority of domestic S-plan and Y-plan zone control applications on standard 22mm branch pipework. The 28mm V4043H1106 is specified where the zone circuit pipework is 28mm — typically on the main heating flow and return in larger properties, heat pump primary circuits, underfloor heating manifold feeds, or any installation where a larger Kv is needed to avoid excessive pressure drop across the zone valve.
Features & Benefits
✔ Motor Open, Spring Return — Fail-Safe Closed
The V4043H uses a motor to open the valve and a return spring to close it. When the wiring centre calls for heat and sends power to the valve, the motor drives the valve open over approximately 12 seconds; when the call ends and power is removed, the return spring snaps the valve closed in about 5–6 seconds — no electrical power required to close. This normally closed, fail-safe design means that in the event of a power failure or wiring fault, the valve defaults to closed, preventing uncontrolled heating circulation.
✔ Potential-Free End Switch — Boiler & Pump Control
The potential-free (volt-free) auxiliary end switch closes as the valve reaches its fully open position. This switch signal is used to fire the boiler and/or start the circulating pump — ensuring the boiler only fires when at least one zone valve is fully open and water is circulating. This is the fundamental boiler interlock mechanism in S-plan and Y-plan wiring configurations. The end switch must be wired to the boiler's live connection (via the wiring centre) to achieve Part L-compliant boiler interlock. The 28mm body is suited to larger primary circuits, high-flow systems, and main heating flow and return pipework where greater Kv capacity is required.
✔ Replaceable Powerhead — No Drain-Down
The motor head (powerhead) can be removed and replaced without draining the heating system. The valve body remains in the pipework; the motorised head clips or screws on and off independently. If the motor fails — by far the most common V4043 failure — the entire valve does not need to be cut out of the pipework. The powerhead can be swapped in minutes with the system full and under pressure, making maintenance on a live system fast and cost-effective.
✔ Manual Lever — Filling and Draining
A manual lever on the valve body allows the valve to be held open manually when filling or draining the heating system — without requiring electrical power to the actuator. This is essential during commissioning (the system needs to circulate water for flushing and chemical treatment) and during drain-down for maintenance on other components. Push the lever to open manually; release to allow the return spring to close.
✔ Quiet Operation — 5W Power Consumption
The synchronous motor is designed for near-silent operation — the only noise during opening is a brief mechanical engagement, not a continuous motor whine. Once fully open, the motor stalls and the end switch holds the boiler on; there is no continuous motor running sound during the heating period. At only 5W power consumption, the valve adds negligible electrical load — far less than the boiler's control electronics.
✔ 28mm Compression — Industry Standard
Standard 28mm compression fittings — the V4043H is the most widely installed motorised zone valve in the UK and is the valve that all standard wiring centre diagrams, S-plan and Y-plan configurations, and installer training are based around. Being the default component in UK heating design means replacement availability is guaranteed and any qualified plumber or heating engineer will be able to install, wire, and commission it correctly without reference to unusual procedures.
Technical Specifications
| Manufacturer / Part No. | Honeywell Home (Resideo) — V4043H1106/U |
| Connection Size | 28mm compression |
| Number of Ports | 2-port (on/off) |
| De-energised State | Normally CLOSED (spring return) |
| Action | Motor open — spring return |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W |
| End Switch Type | SPST — potential-free |
| Opening Time | 12 seconds (nominal) |
| Closing Time | 5–6 seconds (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure (close-off) | 0.45 bar |
| Kv Value | 8.6 |
| Fluid Temperature Range | +5°C to +88°C |
| Max Ambient Temperature | +52°C |
| Electrical Connection | 1.0m heat-resistant flying lead, 6-core |
| Dimensions (H × W × D) | 98 × 117 × 60 mm |
| Flow Direction | As per arrow on valve body |
