The Caleffi R39204 is a STD PLASTIC CHECK VALVE INSERT NV20 DN20 for Caleffi mixing valve systems. It is supplied as a service or integration component and is not a standalone mixing valve.
Best for water heater and storage tank outlets where a single valve sets the distribution temperature for an entire building, zone or riser.
Specifications sourced from Caleffi North America document 01092_NA. Last reviewed August 2026.
Technical Specifications
| Series | Accessories |
| Valve Technology | Thermostatic |
Documentation
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Frequently Asked Questions
What is the warranty on Caleffi R39204?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.
Caleffi 2-Year Limited Warranty. Caleffi North America warrants this product to be free from defects in material and workmanship for two years from the date of shipment, when installed and operated in accordance with published instructions. ZOT Supply is an authorized Caleffi distributor with fast nationwide and international shipping.
- Product Series:
- Accessories
- Valve Technology:
- Thermostatic
- Application:
- Point of Distribution
- Integral Check Valves:
- Yes
- Temperature Gauge:
- No
