The Caleffi 221500A is a straight thermostatic radiator valve body with 3/4". It accepts a Caleffi thermostatic control head, which is ordered separately.
Best for radiators fed in line with the valve connection.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Accepts a Thermostatic Control Head
Supplied with a valve stem sized for Caleffi thermostatic control heads, so the body can be installed first and the head fitted at commissioning.
Straight Body
In-line body for radiators fed along the same axis as the valve connection.
Technical Specifications
| Product Type | Radiator Valve Body |
| Connection Size | 3/4" |
| Body Style | Straight |
| Maximum operating pressure | 150 psi (10 bar) |
| Medium temperature range | 40 to 212 deg F (5 to 100 deg C) |
| Finish | Chrome |
| Series | Valve Bodies (straight) |
| Shipping Weight | 0.7 lb (approx.) |
Documentation
Related Products
- Caleffi 338452 : Convertible Angled TRV Body
- Caleffi 339452 : Convertible Straight TRV Body
- Caleffi 220400A : Angled TRV Body 1/2"
- Caleffi 220500A : Angled TRV Body 3/4"
Frequently Asked Questions
What does Caleffi 221500A do?
It is a straight thermostatic radiator valve body with 3/4". It fits the radiator connection and accepts a Caleffi thermostatic control head, which regulates flow to hold the room at setpoint.
Does Caleffi 221500A include a control head?
No. The body and the control head are separate items. Order a Caleffi thermostatic control head to complete the assembly, or a manual knob if manual control is wanted.
What are the pressure and temperature limits of Caleffi 221500A?
Maximum operating pressure is 150 psi (10 bar), over a medium temperature range of 40 to 212 deg F (5 to 100 deg C).
What is the warranty on Caleffi 221500A?
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.
- Product Type:
- Radiator Valve Body
- Product Family:
- Radiator Valve Bodies
- Series:
- Valve Bodies (straight)
- Connection Size:
- 3/4 inch
- Body Style:
- Straight
- Max Operating Pressure:
- 150 psi (10 bar)
- Medium Temperature Range:
- 40 to 212 deg F (5 to 100 deg C)