HFT40023Z-01 Side Outlet Thermostatic Valve, G3/4
The Legom HFT40023Z-01 Side Outlet Thermostatic Valve is a G3/4 thermostatic mixing valve with a side outlet configuration and natural color pickled inlet and outlet ports — the standard domestic connection size counterpart to the G1 HFT40024Z-01. The mixed water outlet exits from the side of the valve body at 90° to the inlet axis, accommodating pipework layouts where the distribution pipe runs perpendicular to the water heater connection without requiring a separate elbow fitting.
Natural color pickling on the inlet and outlet ports is an acid-cleaning treatment that removes surface oxidation from the copper alloy, leaving a clean, bright natural brass surface without an applied plating layer. 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
- Side outlet at G3/4 — most common domestic TMV connection size – Brings the 90° side outlet configuration to the standard domestic water heater connection size, accommodating perpendicular pipework layouts without a separate elbow at the most common residential TMV specification
- Natural color pickled ports – Acid-cleaned natural brass surface on inlet and outlet connection areas — no plating layer, clean thread profile, oxide-free surface for thread sealant adhesion
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point across varying supply conditions
- 20–60°C adjustment range – ABS black handwheel with factory-preset narrower ranges available for safety-restricted applications
- No electricity required – Self-acting thermostatic operation with no electrical connection needed
- 57-3 copper body – Durable copper alloy construction for long-term potable hot water service
- Wide pressure range 0.03–1 MPa – Including low-pressure gravity-fed systems from 0.03 MPa
- Customizable preset temperature ranges – OEM orders can specify factory-preset ranges for restricted-adjustment applications
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT40023Z-01 |
| Body Material | 57-3 copper, surface plated body; natural color pickled inlet and outlet ports |
| Handwheel | ABS black |
| Connection | G3/4 internal thread (DN20) |
| Outlet Configuration | Side outlet |
| Port Surface Treatment | Natural color pickling (acid cleaned, no plating layer) |
| 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) |
HFT Side Outlet Series — Size Comparison
| Model | Connection | Bore | Typical Use |
|---|---|---|---|
| HFT40023Z-01 | G3/4 side outlet | DN20 | Standard domestic water heater |
| HFT40024Z-01 | G1 side outlet | DN25 | Light commercial / larger domestic |
Application & Use Cases
- Domestic water heaters with perpendicular distribution pipework – Where the hot water distribution pipe exits horizontally from the side of the installation space rather than in line with the water heater connections
- Wall-mounted water heater installations – Where the mixed outlet must exit sideways to connect to wall-run distribution pipework without clearance for an inline elbow fitting
- OEM water heater product integration – The natural pickled port finish and side outlet geometry make this model suited for integration into OEM water heater assemblies where a specific connection appearance and outlet direction are product design requirements
- Compact bathroom and kitchen installations – Where space constraints at the point of TMV installation prevent inline pipework and a side outlet eliminates the need for a separate 90° fitting
- All standard domestic water heater types – Compatible with electric storage, gas instantaneous, solar thermal, and heat pump systems with G3/4 outlet connections
Installation Notes
- Identify the side outlet port before installation and route distribution pipework to align with the side exit direction
- Connect hot water to the hot inlet (H), cold water to the cold inlet (C), and distribution pipework to the side mixed outlet (M) using male G3/4 fittings with appropriate thread sealant
- The pickled port surfaces are clean and oxide-free — apply thread sealant directly without additional surface preparation
- Install isolation valves upstream of both hot and cold inlets
- Install a strainer on the cold inlet to protect the thermostatic cartridge
- Verify outlet temperature at the furthest fixture with a calibrated thermometer after installation
- The valve performs optimally at 0.1–0.5 MPa
Frequently Asked Questions
When should I choose the HFT40023Z-01 over the standard HFT30001 G3/4?
Choose the HFT40023Z-01 when your pipework layout requires the mixed water outlet to exit at 90° to the valve’s inlet axis — for example, when the distribution pipe runs along the wall perpendicularly to the water heater connection. In this layout, the side outlet eliminates the need for a separate elbow fitting on the mixed outlet, reducing connection count and saving space. If your pipework runs inline with the valve (straight through), the standard HFT30001 G3/4 is the appropriate choice.
What is natural color pickling on the ports?
Pickling is an acid-cleaning process applied to the inlet and outlet connection areas that removes surface oxides and contaminants from the 57-3 copper alloy, leaving a clean natural brass surface without any plating layer. The result is a bright, natural copper-gold appearance at the connection ports, with a clean thread profile ready for sealant application. Unlike nickel or chrome plating, there is no applied metal coating that could chip or delaminate at the connection point under thread engagement stress.
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 that mechanically restrict handwheel travel. Contact the Legom team to specify the required preset range and outlet orientation requirements when ordering.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT40023Z-01 Side Outlet Thermostatic Valve. Customization options include outlet orientation, preset temperature range, connection size, body finish, and port surface treatment. 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.
