Guardian G6020 Thermostatic Mixing Valve, 13 Gallon/49 Liter Capacity - Replaces Guardian G3600LF
Availability : Usually Ships in 15 Business Days
✅ 13 GPM (49 L/Min) Flow Capacity
✅ Adjustable Tepid Water Range 65°F–95°F
✅ ASSE 1071 Certified Thermostatic Mixing Valve
✅ Built-In Cold Water Bypass
✅ Automatic Hot Water Shutoff Protection
✅ Includes Dial Temperature Gauge
This unit is listed as the replacement for Guardian’s G3600LF Thermostatic Mixing Valve.
ANSI Z358.1 requires emergency eyewash and drench shower equipment to deliver tepid water — defined as 60°F to 100°F — for a full 15-minute flush. Without a thermostatic mixing valve, water temperature can fluctuate with supply conditions, potentially discouraging proper use during an emergency.
The Guardian G6020 thermostatic mixing valve is designed to blend hot and cold water to a controlled tepid temperature for emergency fixtures. It uses a precision thermal actuator to maintain stable output and includes built-in safety features for supply interruptions. The G6020 is ASSE 1071 certified and lead-free per the U.S. Safe Drinking Water Act, making it suitable for commercial and industrial safety applications.
KEY FEATURES
Thermostatic Temperature Control
Blends hot and cold water to maintain a stable tepid output suitable for emergency eyewash and safety shower applications.
Cold Water Bypass
Provides cold water flow (9 GPM) if the hot water supply is interrupted, helping keep the fixture operational during an emergency.
Hot Water Shutoff Protection
Automatically shuts off flow if the cold water supply fails, preventing delivery of excessively hot water.
Dial Temperature Gauge Included
Allows facility personnel to visually monitor outlet temperature at the valve.
Flexible Installation Options
Inlets can be configured from the top, back, or bottom, with outlet options for multiple orientations.
Integrated Service Components
Includes inlet shutoff valves, internal check valves, and strainers to support maintenance and long-term operation.
WHICH VERSION IS RIGHT FOR YOU?
- G6020 — Valve only with mounting bracket (this unit)
- G6021 — Surface-mounted steel cabinet
- G6022 — Surface-mounted stainless steel cabinet
- G6023 — Recessed steel cabinet
- G6024 — Recessed stainless steel cabinet
- G6040 — 50 GPM system for higher-demand or combination units
SIZING / HOW MANY DO YOU NEED?
The G6020 is typically used for a single eyewash, eye/face wash, or drench hose. In some systems, it may support multiple fixtures depending on supply pressure and piping design.
For combination eyewash and drench shower units — or where multiple fixtures may operate at the same time — a higher-capacity valve such as the G6040 (50 GPM) is recommended.
Proper system sizing is required to meet ANSI Z358.1 performance requirements.
Q: Does the G6020 replace the G3600LF?
A: The G6020 is listed as the replacement model for the Guardian G3600LF.
Q: Is the G6020 lead-free?
A: Yes. It meets U.S. Safe Drinking Water Act lead-free requirements and is ASSE 1071 certified.
Q: What temperature does it deliver?
A: Factory set at 85°F and adjustable from 65°F to 95°F, with a maximum limit of 90°F.
Q: What happens if hot water supply fails?
A: The valve provides cold water flow through an internal bypass to help maintain operation.
Q: Does this meet ANSI Z358.1?
A: The G6020 is ASSE 1071 certified and designed to deliver tepid water. ANSI Z358.1 compliance depends on proper system design, installation, and maintenance of the full emergency fixture.
Application: Thermostatic mixing valve to blend hot and cold water to deliver tepid water. Valve has a flow capacity of 13 GPM (49 L/min) at 30 PSI pressure drop. Valve can be used to supply emergency eyewash, eye/face wash or drench hose unit. Depending on water supply size and pressure, valve can supply multiple units.
Mounting: Valve inlets can be positioned on top, back or bottom of valve. Outlet can be on top or bottom. Valve can be configured in the field for any mounting position. Furnished with heavy duty stainless steel mounting bracket.
Temperature Control: Valve has precision thermal actuator that senses incoming water temperature and automatically blends water to preset temperature. Valve is factory set to deliver 85°F (29°C) water. Temperature of tepid water can be adjusted as required and then locked. Furnished with dial temperature gauge as standard to monitor temperature of tepid water.
Cold Water Bypass: If the supply of hot water is restricted or interrupted, an internal bypass allows the valve to deliver cold water only. In bypass mode, the valve delivers 9 GPM (34 L/min) at 30 PSI (2.1 bar) pressure drop.
Hot Water Shutoff: Valve has internal PTFE valve seat. If the supply of cold water is interrupted, the valve will close completely and not deliver any water at all, eliminating any possibility of scalding. Flow Capacity: Refer to table below for flow capacity of valve at specified pressure drops.
Checkstops/Filters: Each inlet has a lockable shutoff valve for maintenance, internal check valve to prevent backflow and stainless steel basket filter to remove debris from the water flow.
Construction: Valve meets the requirements of the U.S. Safe Drinking Water Act as lead-free.
Inlet/Outlet: 1/2” NPT female inlets and outlet as standard.
Quality Assurance: Valve is ASSE certified under ANSI/ASSE 1071. Valve is fully assembled and factory tested prior to shipment.
Water Pressure/Temperature Requirements
Supply Pressure: Maximum incoming water pressure is 125 PSI (8.6 bar). Pressure of hot and cold water supplies can vary up to 25% and still deliver the flow and temperature required by ANSI/ASSE 1071.
Hot Water Supply Temperature: Incoming hot water temperature range is 120° - 180°F (49° - 82°C). Guardian recommends that the hot water temperature not exceed 140°F (60°C).
Cold Water Supply Temperature: Incoming cold water temperature range is 40° - 70°F (4° - 21°C). Cold water temperature must be at least 10°F (5.6°C) less than the temperature of the delivered tepid water.
Tepid Water Temperature: Temperature of tepid water is adjustable within a range of 65° - 95°F (18° - 35°C) and then locks in position. High temperature limit stop is set at 90°F (32°C) to prevent misadjustment.
| Material | Stainless Steel |
| Max Water Output Temp | 85 °F |
| Inlet Pipe Gender | Female |
| Inlet Pipe Size | 1/2 in |
| Inlet Pipe Thread Type | NPT |
| Outlet Pipe Gender | Female |
| Outlet Pipe Size | 1/2 in |
| Outlet Pipe Thread Type | NPT |
| Max Inlet Pressure | 125 psi |
| Max Inlet Temp | 180 °F |
| Minimum Flow Rate | 3 gpm |
| Max Flow Rate | 13 gpm |
| Height | 6-1/4 in |
| Width | 3-3/8 in |
| Depth | 7-3/8 in |
| Compatible with Brand | Guardian |
| Compatible with Series | Guardian Mixing Valves |
| Includes | Stainless Steel Wall Bracket for Mounting |
| Color | Yellow |
WARNING: California Residents
This product and/or packaging can expose you to chemicals including Styrene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
