HFT40014Z-01 Thermostatic Diverter Valve, G3/4
The Legom HFT40014Z-01 Thermostatic Diverter Valve is a G3/4 thermostatic mixing valve with an integrated water inlet and outlet connector in a bottom inlet, side outlet configuration — the standard domestic connection size counterpart to the G1 HFT40015Z-01. Hot and cold water supplies enter the valve from the bottom through the integrated inlet connector, while the mixed water outlet exits from the side of the body, matching water heater installations where vertical supply risers and horizontal distribution pipework meet at the mixing point.
The integrated connector reduces external fitting count at the heater connection point by building the inlet connection directly into the valve body, creating a compact self-contained mixing assembly. Temperature adjustment range 20–60°C, control accuracy ±2°C, working pressure range 0.03–1 MPa. Manufactured from 57-3 copper with surface plating, compatible with hot water inlet 30–99°C and cold water inlet 5–29°C.
Key Benefits
- G3/4 bottom inlet, side outlet — domestic standard size – Brings the integrated bottom-inlet/side-outlet geometry to the most common domestic water heater connection size, matching vertical supply and horizontal distribution layouts without additional elbow or adapter fittings
- Integrated inlet connector — fewer joints, more compact assembly – Hot and cold inlet connections are integrated into the valve body rather than being separate threaded ports, reducing the total fitting count and creating a more compact installation footprint at the heater connection point
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point across varying supply pressure and temperature conditions
- 20–60°C adjustment range – ABS black handwheel for full-range commissioning adjustment, with factory-preset narrower ranges available for safety applications
- No electricity required – Self-acting thermostatic operation with no electrical connection needed
- 57-3 copper with surface plating – Durable copper alloy body for potable hot water service
- Wide pressure range 0.03–1 MPa – Covers gravity-fed through standard mains-pressure systems
- OEM integration ready – Purpose-built geometry for water heater manufacturer integration at the standard domestic G3/4 connection size
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT40014Z-01 |
| Body Material | 57-3 copper, surface plated |
| Handwheel | ABS black |
| Connection | G3/4 internal thread (DN20) |
| Valve Type | Thermostatic diverter valve |
| Inlet Direction | Bottom (integrated connector) |
| Outlet Direction | Side |
| Temperature Adjustment Range | 20–60°C (standard); 35–55°C / 40–50°C / 30–60°C (preset options) |
| Temperature Control Accuracy | ± 2°C |
| Working Pressure Range | 0.03 MPa – 1 MPa |
| Ideal Working Pressure | 0.1 MPa – 0.5 MPa |
| Cold Water Temperature Range | 5°C – 29°C |
| Hot Water Temperature Range | 30°C – 99°C |
| Primary Use | Water heater (domestic, OEM integration) |
HFT Thermostatic Diverter Valve Series
| Model | Connection | Bore | Typical Use |
|---|---|---|---|
| HFT40014Z-01 | G3/4 bottom inlet / side outlet | DN20 | Standard domestic water heater, OEM |
| HFT40015Z-01 | G1 bottom inlet / side outlet | DN25 | Larger domestic / light commercial, OEM |
Application & Use Cases
- Domestic water heaters with vertical supply and horizontal distribution – Where hot and cold supply risers approach from below and the mixed water distribution pipe exits horizontally — the most common layout in wall-hung domestic water heater installations
- OEM water heater product integration at G3/4 – Water heater manufacturers requiring a compact, integrated thermostatic mixing assembly at the standard domestic G3/4 connection size for product-line integration without separate fittings
- Electric storage water heaters – Domestic electric storage units where the bottom connections and side distribution outlet geometry of the HFT40014Z-01 matches the heater’s standard outlet configuration
- Solar thermal domestic systems – Where the integrated connector design and bottom inlet geometry suit the connection configuration of compact solar storage cylinders
- Compact installation assemblies requiring minimal fitting count – Where reducing the number of individual fittings at the heater connection point is a design requirement for space or reliability reasons
Installation Notes
- Connect the hot and cold water supplies to the bottom integrated inlet connector — connections are made directly to the integrated fitting built into the valve body
- Connect distribution pipework to the side mixed outlet (M) using male G3/4 fittings with appropriate thread sealant
- Plan pipework layout to align with the bottom inlet and side outlet before installation — the integrated connector geometry is fixed and cannot be rotated once connected
- Install isolation valves upstream of both hot and cold supply lines
- Install a strainer on the cold inlet to protect the thermostatic cartridge
- The valve performs optimally at 0.1–0.5 MPa
- Verify outlet temperature at the furthest fixture with a calibrated thermometer after installation
- For OEM integration dimensional drawings and connection interface details, contact the Legom technical team
Frequently Asked Questions
When should I choose the HFT40014Z-01 over the HFT40015Z-01?
Choose the HFT40014Z-01 when your water heater outlet connection is G3/4 (DN20) — the standard domestic water heater size. Choose the HFT40015Z-01 when the connection is G1 (DN25), which suits larger domestic or light commercial systems requiring higher flow capacity. Both models share the same bottom inlet, side outlet, integrated connector geometry and identical thermostatic performance — the only difference is connection size.
How does the integrated connector differ from a standard threaded port?
A standard TMV has individual threaded ports that each accept a separate pipe fitting — typically a compression fitting, union, or threaded elbow — which is then connected to the supply pipe. The integrated connector on the HFT40014Z-01 incorporates the inlet connection interface directly into the valve body casting, so the supply pipe connects directly to this integrated fitting without a separate intermediate fitting at that joint. This reduces the total number of individual fittings and joints at the connection point, making the overall assembly more compact and eliminating one potential leak point per inlet.
Can the temperature range be factory-preset?
Yes. OEM and project orders can specify factory-preset temperature ranges of 35–55°C, 40–50°C, or 30–60°C. For OEM integration projects, dimensional drawings and connection interface specifications are available from the Legom technical team. Contact us with your complete assembly requirements.
OEM & ODM Customization
Legom supports full OEM and ODM services for the HFT40014Z-01 Thermostatic Diverter Valve. Customization options include inlet and outlet orientation, preset temperature range, integrated connector specification, connection size, and body finish. Contact us with your complete assembly requirements via WhatsApp or info@legomsmart.com.
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official datasheet or contact our sales team.
Custom OEM & ODM Solutions
Legom is a direct manufacturer offering end-to-end OEM and ODM services. With our in-house engineering and production capabilities, we work closely with distributors and system integrators to deliver fully customized solutions under strict NDA.
