HFT33017Z-01 Thermostatic Mixing Valve, G3/4
The Legom HFT33017Z-01 Thermostatic Mixing Valve is a G3/4 thermostatic mixing valve featuring a gray glossy silk-screen handwheel, nickel-plated union body, and an integrated water inlet and outlet connector — combining the easy-disconnect advantage of union connections with the corrosion resistance of nickel plating and a distinctive gray handwheel finish suited to modern visible installation environments. 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.
Manufactured from 57-3 copper with nickel plating, the HFT33017Z-01 provides the standard domestic G3/4 connection with union fittings that allow the valve to be disconnected and serviced without rotating the body — particularly valuable in confined installation spaces and high-maintenance commercial environments. Factory-preset temperature ranges available for OEM orders.
Key Benefits
- Gray glossy silk-screen handwheel — unique finish in the HFT range – The gray glossy handwheel with silk-screen graphics provides a visually distinctive finish not found in any other standard HFT model, suited to modern plumbing aesthetics, white-scheme plant rooms, and OEM products where a non-black, non-white handwheel is a design specification
- Nickel-plated union body – Nickel plating over the 57-3 copper body with union connections combines corrosion resistance, premium surface finish, and easy-disconnect serviceability in a single specification
- Union connections for fast installation and servicing – Union fittings allow the valve body to be connected and disconnected without rotating it in the pipework, reducing installation time in confined spaces and enabling faster cartridge replacement during periodic maintenance
- Integrated water inlet and outlet connector – The inlet and outlet connections are integrated into the valve body assembly, reducing the external fitting count at the connection point and creating a compact, self-contained assembly
- G3/4 — standard domestic water heater connection – Direct compatibility with standard domestic storage water heater outlets and G3/4 pipework
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point
- 20–60°C adjustment range – Full-range commissioning flexibility with factory-preset narrower ranges available
- No electricity required – Self-acting thermostatic operation with no electrical connection needed
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT33017Z-01 |
| Body Material | 57-3 copper, nickel plated |
| Connection Type | Union (nickel plated) |
| Handwheel | ABS gray glossy silk-screen |
| Thread Size | G3/4 internal thread (DN20) |
| Inlet/Outlet | Integrated water inlet and outlet connector |
| 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) |
HFT33017Z-01 Feature Summary vs Similar Models
| Feature | HFT33017Z-01 | HFT40020Z-01 | HFT30001 G3/4 |
|---|---|---|---|
| Handwheel | Gray glossy silk-screen | Black 1–7 MAX scale | Black silk-screen |
| Connection | Union (nickel plated) | Union inlet only | Fixed thread |
| Body finish | Nickel plated | Nickel plated | Nickel plated |
| Connector type | Integrated | Union inlet only | Standard ports |
Application & Use Cases
- Modern domestic water heater installations with premium aesthetics – Where the installation environment features white, gray, or light-toned surroundings and the gray handwheel coordinates better than the standard black options across the HFT range
- OEM water heater products with gray color scheme specification – Manufacturers requiring a gray handwheel to match their product’s color palette or brand specification, while retaining the nickel-plated body and union connection functionality
- High-maintenance installations requiring regular cartridge access – The union connections allow the valve to be disconnected for cartridge inspection without rotating the body, making annual TMV verification faster and less disruptive
- Retrofit installations in confined spaces – Where the union connection’s easy-disconnect advantage is most valuable in tight under-sink, in-cabinet, or in-wall installation environments
- All standard domestic water heater types – Compatible with electric, gas, solar thermal, and heat pump water heaters with G3/4 outlet connections
Installation Notes
- Install the union tail pieces onto the hot (H), cold (C), and mixed (M) pipe ends first using appropriate thread sealant, then connect the valve body by tightening the nickel-plated union nuts
- Ensure union sealing washers or O-rings are correctly seated — hand-tight plus a quarter turn is sufficient for a leak-free union joint
- 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
- Verify outlet temperature at the furthest fixture with a calibrated thermometer after installation
- Flush supply lines before installation to remove debris
Frequently Asked Questions
Why is the handwheel gray rather than the standard black or white?
The gray glossy handwheel is a design specification option that fills the gap between black (the most common HFT handwheel color) and white (found on the HFT65001, HFT47001, HFT47002, and SMA series). Gray suits installation environments with a neutral, modern aesthetic — particularly white or light-toned plant rooms, utility areas, and OEM water heater products with gray color scheme branding. It is the only model in the standard Legom HFT range with a gray handwheel, making it a distinctive option for OEM product differentiation.
What is the difference between this model and the HFT40020Z-01?
Both are G3/4 thermostatic mixing valves with union connections and nickel-plated bodies. The key differences are the handwheel and connector scope. The HFT40020Z-01 has a black numbered 1–7 MAX scale handwheel with a union on the hot inlet only, while the HFT33017Z-01 has a gray glossy silk-screen handwheel with a fully nickel-plated union body and integrated inlet and outlet connector. Choose the HFT33017Z-01 when the gray handwheel finish is required or when full union disconnection at all connections is preferred over union-inlet-only access.
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 gray handwheel can also be customized with an OEM graphic or alternative color specification. Contact the Legom team with your requirements.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT33017Z-01 Thermostatic Mixing Valve. Customization options include handwheel color and graphic design, preset temperature range, connection size, union specification, 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.
