Interchangeable Cartridge Freeze Prevention Valve
The thermostatic IC/FP uses an interchangeable cartridge design that is tee-mounted into the protected piping, positioning the thermal actuator directly in the water stream. Available in ½″ and ¾″ NPT configurations with brass or stainless-steel construction, the valve can serve as the primary method of freeze protection or as a fail-safe backup on heat-traced systems.
For applications requiring ambient-temperature sensing, see the HAT/FP Freeze Protection Valve.
Design Features
- Exclusive Thermoloid® paraffin wax actuator
- Corrosion-resistant construction
- Narrow temperature band
- Compact and low mass construction
- Two wrench flats for easy installation
- Ram-type plug for reliable shutoff
Typical Applications
The IC/FP supports water pipe freeze protection across a range of industrial and emergency water systems, including:
- Heat-traced piping
- Insulated water lines
- Safety shower and eyewash supply piping
- Fire lines and spray nozzles
- Condensate systems
Technical Documents
Specifications
- Sizes: ½”, ¾”
- Maximum Operating Pressure for ½”: 150 PSIG (10.3 bar)
- Maximum Operating Pressure for ¾”: 100 PSIG (6.9 bar)
- Maximum Temperature: Range 150ºF (83.3ºC) over set -point with a limit of 300ºF (149ºC)
- Materials: brass, 303 stainless steel or 316 stainless steel
Ordering
| Part Number | Description |
| 180 – 000000 – 035 | 1/2” IC/FP-35 Cartridge1 |
| 180 – 000000 – 039 | 1/2” IC/FP-39 Cartridge1 |
| 180 – 110000 – 035 | 1/2” IC/FP-35 SS Cartridge1 |
| 180 – 110000 – 039 | 1/2” IC/FP-39 SS Cartridge1 |
| 185 – 000000 – 035 | 3/4” IC/FP Cartridge1 |
| 185 – 110000 – 035 | 3/4” IC/FP Cartridge 316 SS1 |
| 185 – 220000 – 035 | 3/4” IC/FP Cartridge 303 SS1 |
Ordering & Configuration Notes
- Full open/close temperatures: 35°F (1.7°C)/40°F (4.4°C); 39°F (3.9°C)/48°F (8.9°C) – Other temperatures available upon request.
Certifications
- NSF/ANSI/CAN 61 & 372 Certified valve options are available.
IC/FP Installation
The IC/FP Freeze Protection Valve is installed at the lowest point within the protected system and tee-mounted so the thermal actuator remains positioned in the water stream. Installation requires a minimum 1″ tee with either a 1″ × ¾″ NPT reducer bushing or a 1¼″ × ¾″ × 1¼″ NPT reducer tee without a bushing. Adequate internal clearance must be provided for the actuator.
How the IC/FP Valve Works
When the water temperature falls below the valve’s specified set point, typically 35°F (1.7°C), the thermal actuator modulates the valve open to discharge cold water. Once warmer makeup water raises the temperature approximately 5°F above the open set point, typically 40°F (4.4°C), the valve modulates closed. Because the actuator remains continuously wetted, operation is based on water temperature rather than ambient air temperature.
For solar applications, install a minimum 12-inch dead leg upstream of the IC/FP to help protect the valve from residual fluid temperatures that may reach or exceed 300°F (148.9°C).
