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Honeywell Home V4043H1056 22mm 2-Port Motorised Zone Valve Twin Pack — 2 Valves S-Plan Central Heating Zone Control
Honeywell Home V4043H1056 22mm 2-Port Motorised Zone Valve Twin Pack — 2 Valves S-Plan Central Heating Zone Control
This is a twin pack of two Honeywell Home V4043H1056/U 22mm motorised zone valves — the most commonly specified zone valve bundle for a complete S-plan central heating installation. In a standard S-plan configuration, one valve is installed on the heating circuit and one on the hot water circuit, providing independent motorised control of each zone with individual end switches that fire the boiler and pump only when needed. Buying as a twin pack ensures a matched pair with identical specifications and wiring — eliminating any uncertainty about compatibility between a new valve and an existing one. Each valve features motor-open/spring-return action, a normally closed fail-safe position, a potential-free SPST end switch, replaceable powerhead, manual lever, and 1 metre heat-resistant flying lead.
ℹ Why Two Valves? — S-Plan Explained
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
⚡ Y-Plan Note — If your system uses a Y-plan configuration (single mid-position valve), you require one three-port mid-position valve (such as the Honeywell V4073A) rather than two two-port valves. The V4043H1056 is a two-port (on/off) valve — it is not suitable for Y-plan use without a full S-plan conversion.
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.
✔ 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.
✔ 22mm Compression — Industry Standard
Standard 22mm 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.
Specifications — Each Valve (× 2 supplied)
| Pack Contents | 2× Honeywell Home V4043H1056/U |
| Connection Size | 22mm compression (per valve) |
| De-energised State | Normally CLOSED |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W per valve |
| End Switch | SPST potential-free — 250VAC, 4A |
| Opening / Closing Time | 12 sec open / 5–6 sec close (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure | 0.55 bar |
| Kv Value | 6.9 |
| Fluid Temperature Range | +5°C to +88°C |
| Electrical Connection | 1.0m heat-resistant flying lead (per valve) |
| Dimensions (H × W × D) | 98 × 112 × 60 mm |
| Typical Application | S-plan: one on CH circuit + one on HW circuit |
$69.44
Original: $198.40
-65%Honeywell Home V4043H1056 22mm 2-Port Motorised Zone Valve Twin Pack — 2 Valves S-Plan Central Heating Zone Control—
$198.40
$69.44More Images
Honeywell Home V4043H1056 22mm 2-Port Motorised Zone Valve Twin Pack — 2 Valves S-Plan Central Heating Zone Control
This is a twin pack of two Honeywell Home V4043H1056/U 22mm motorised zone valves — the most commonly specified zone valve bundle for a complete S-plan central heating installation. In a standard S-plan configuration, one valve is installed on the heating circuit and one on the hot water circuit, providing independent motorised control of each zone with individual end switches that fire the boiler and pump only when needed. Buying as a twin pack ensures a matched pair with identical specifications and wiring — eliminating any uncertainty about compatibility between a new valve and an existing one. Each valve features motor-open/spring-return action, a normally closed fail-safe position, a potential-free SPST end switch, replaceable powerhead, manual lever, and 1 metre heat-resistant flying lead.
ℹ Why Two Valves? — S-Plan Explained
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
⚡ Y-Plan Note — If your system uses a Y-plan configuration (single mid-position valve), you require one three-port mid-position valve (such as the Honeywell V4073A) rather than two two-port valves. The V4043H1056 is a two-port (on/off) valve — it is not suitable for Y-plan use without a full S-plan conversion.
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.
✔ 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.
✔ 22mm Compression — Industry Standard
Standard 22mm 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.
Specifications — Each Valve (× 2 supplied)
| Pack Contents | 2× Honeywell Home V4043H1056/U |
| Connection Size | 22mm compression (per valve) |
| De-energised State | Normally CLOSED |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W per valve |
| End Switch | SPST potential-free — 250VAC, 4A |
| Opening / Closing Time | 12 sec open / 5–6 sec close (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure | 0.55 bar |
| Kv Value | 6.9 |
| Fluid Temperature Range | +5°C to +88°C |
| Electrical Connection | 1.0m heat-resistant flying lead (per valve) |
| Dimensions (H × W × D) | 98 × 112 × 60 mm |
| Typical Application | S-plan: one on CH circuit + one on HW circuit |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
This is a twin pack of two Honeywell Home V4043H1056/U 22mm motorised zone valves — the most commonly specified zone valve bundle for a complete S-plan central heating installation. In a standard S-plan configuration, one valve is installed on the heating circuit and one on the hot water circuit, providing independent motorised control of each zone with individual end switches that fire the boiler and pump only when needed. Buying as a twin pack ensures a matched pair with identical specifications and wiring — eliminating any uncertainty about compatibility between a new valve and an existing one. Each valve features motor-open/spring-return action, a normally closed fail-safe position, a potential-free SPST end switch, replaceable powerhead, manual lever, and 1 metre heat-resistant flying lead.
ℹ Why Two Valves? — S-Plan Explained
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
In an S-plan (or S-plan Plus) central heating system — by far the most common UK configuration — two separate two-port zone valves independently control the flow of water to the heating circuit (radiators or UFH) and the hot water circuit (cylinder coil). When a thermostat calls for heat, it signals the appropriate zone valve to open; as the valve reaches full open, its end switch fires the boiler and starts the pump. When demand is met, the valve closes, the end switch opens, and the boiler shuts down. This provides independent time and temperature control of heating and hot water, satisfying Part L of the Building Regulations boiler interlock requirements. Two V4043H1056 valves and a suitable wiring centre are the core of this system.
⚡ Y-Plan Note — If your system uses a Y-plan configuration (single mid-position valve), you require one three-port mid-position valve (such as the Honeywell V4073A) rather than two two-port valves. The V4043H1056 is a two-port (on/off) valve — it is not suitable for Y-plan use without a full S-plan conversion.
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.
✔ 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.
✔ 22mm Compression — Industry Standard
Standard 22mm 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.
Specifications — Each Valve (× 2 supplied)
| Pack Contents | 2× Honeywell Home V4043H1056/U |
| Connection Size | 22mm compression (per valve) |
| De-energised State | Normally CLOSED |
| Supply Voltage | 220–240V AC, 50/60Hz |
| Power Consumption | 5W per valve |
| End Switch | SPST potential-free — 250VAC, 4A |
| Opening / Closing Time | 12 sec open / 5–6 sec close (spring return) |
| Max Static Pressure | 8.6 bar |
| Max Differential Pressure | 0.55 bar |
| Kv Value | 6.9 |
| Fluid Temperature Range | +5°C to +88°C |
| Electrical Connection | 1.0m heat-resistant flying lead (per valve) |
| Dimensions (H × W × D) | 98 × 112 × 60 mm |
| Typical Application | S-plan: one on CH circuit + one on HW circuit |
