HFT36003Z-01 Thermostatic Valve, G1
The Legom HFT36003Z-01 Thermostatic Valve is a G1 thermostatic mixing valve with a green ABS handwheel, natural color pickled movable inlet and outlet joints, and a 57-3 copper body — a distinctive combination of handwheel color, joint flexibility, and surface treatment not found in any other model in the HFT range. The movable joints allow both inlet and outlet connections to be repositioned to align with offset or misaligned supply pipework, while the natural color pickling leaves a clean, bright natural brass surface on the joint connection areas without an applied plating layer.
Temperature adjustment range 20–60°C, control accuracy ±2°C, working pressure range 0.03–1 MPa, compatible with hot water inlet 30–99°C and cold water inlet 5–29°C. The G1 (DN25) connection provides mid-range commercial flow capacity between the standard domestic G3/4 and larger commercial G1¼ and above.
Key Benefits
- Green handwheel — unique color in the HFT range – The green ABS handwheel provides immediate visual identification in multi-valve installations and suits OEM water heater products with green color branding or specific color-coding requirements. Green is used in some markets as a color code for cold water or safety-related plumbing components, making it a meaningful visual specification beyond aesthetics alone
- Natural color pickled movable joints – The movable inlet and outlet joints carry a natural color pickling surface treatment — acid-cleaned to remove oxides, leaving a clean bright natural brass surface without plating. This combines the installation flexibility of movable joints with the clean natural brass appearance preferred in OEM integration applications
- Movable inlet and outlet joints — full connection flexibility – Both the hot inlet, cold inlet, and mixed outlet connections can be repositioned to accommodate offset or misaligned supply pipework, eliminating the need for additional elbow fittings or pipework modification in retrofit and confined-space installations
- G1 connection (DN25) for mid-range flow – Higher flow capacity than standard G3/4 domestic models, suited to larger domestic storage water heaters and light commercial applications
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point
- 20–60°C adjustment range – Full-range flexibility with factory-preset narrower ranges available
- No electricity required – Self-acting thermostatic operation with no electrical connection needed
- 57-3 copper body – Durable copper alloy construction for potable hot water service
- Wide pressure range 0.03–1 MPa – Covers gravity-fed through mains-pressure systems
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT36003Z-01 |
| Body Material | 57-3 copper |
| Handwheel | ABS green |
| Connection | G1 internal thread (DN25) |
| Joint Type | Movable inlet and outlet joints |
| Joint Surface Treatment | Natural color pickling (acid cleaned, no plating) |
| 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 and light commercial, OEM) |
HFT Handwheel Color Guide
| Color | Models | Best For |
|---|---|---|
| Black (various finishes) | Most HFT models | Standard installations |
| White silk-screen | HFT65001, HFT47001/02, SMA series | Light-toned environments |
| Gray glossy | HFT33016/17Z-01 | Neutral modern aesthetic, gray OEM |
| Electroplated metallic | HFT40005/06/07H-01 | Premium visible installations |
| Green | HFT36003Z-01 | Color-coded identification, green OEM branding |
Application & Use Cases
- Color-coded multi-valve installations – Where multiple thermostatic valves serve different circuits or temperature zones and handwheel color coding distinguishes each valve’s function at a glance — green is commonly used to indicate specific temperature ranges or circuit types in plumbing color-coding conventions
- OEM water heater products with green branding – Manufacturers whose product color scheme or brand identity uses green as a primary or accent color, enabling the TMV handwheel to coordinate with the overall product appearance
- Retrofit and misaligned pipework installations – The movable joints accommodate pipework that does not align with standard fixed-port valve body positions, making the HFT36003Z-01 well suited to replacement of existing valves in established pipework layouts
- Larger domestic and light commercial water heaters – The G1 (DN25) connection provides the flow capacity required for larger domestic storage units and light commercial systems where G3/4 is undersized
- Solar thermal and heat pump systems – Where the G1 bore and movable joints simplify connection to heater outlets with variable positioning requirements
Installation Notes
- Position the valve and adjust the movable joints on all three connections (H, C, M) to align with the actual pipe positions before tightening any connections
- The pickled joint surfaces are clean and oxide-free — apply thread sealant directly to the natural brass surface without additional preparation
- Tighten all movable joint connections fully and evenly after alignment — partial tightening can result in leakage under operating pressure
- Install isolation valves upstream of both hot and cold inlets
- Install a strainer on the cold inlet to protect the thermostatic cartridge
- The valve performs optimally at 0.1–0.5 MPa
- Check all movable joint connections under operating pressure for leaks before commissioning
- Verify outlet temperature at the furthest fixture with a calibrated thermometer after installation
Frequently Asked Questions
Why is the handwheel green rather than the standard black or white?
The green handwheel serves both a functional and aesthetic purpose. Functionally, green is used in some plumbing color-coding systems to distinguish specific circuits, temperature ranges, or valve functions in multi-valve installations, enabling rapid identification without reading labels. Aesthetically, green coordinates with OEM water heater products that use green as a brand or accent color. It is the only model in the standard Legom HFT range with a green handwheel, making it unique for applications requiring this specific color specification.
What is natural color pickling on the movable joints?
The movable joints are acid-cleaned through a pickling process that removes surface oxides from the 57-3 copper alloy, leaving a clean, bright natural brass surface without any applied plating layer. This provides a clean thread profile at the connection points with an oxide-free surface for thread sealant adhesion, and the natural brass appearance that is preferred in specific OEM integration applications where no metallic coating is specified on the connection areas.
How do movable joints differ from standard fixed ports?
Standard fixed-port TMVs have connection ports at fixed positions on the valve body — the pipe must come from the exact direction of the port. Movable joints can be repositioned — typically by swiveling or articulating — to meet a pipe coming from a slightly different direction or position. Once the correct position is found, the joint is tightened to lock and seal. This eliminates the need for additional elbow or offset fittings to connect misaligned supply pipes to a fixed-port valve.
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. The green handwheel color can also be customized to other colors for OEM branding. Contact the Legom team with your requirements.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT36003Z-01 Thermostatic Valve. Customization options include handwheel color, preset temperature range, movable joint configuration, connection size, and body finish. Contact us 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.
