The Caleffi 145669A 13G is a FLOWMATIC pressure independent control valve with 1" Sweat connections, adjustable across 1.3 to 13 GPM.
Best for multi-zone systems where differential pressure swings would otherwise force repeated rebalancing.
Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.
Key Features
Pressure Independent Flow Control
Holds the designed flow rate regardless of differential pressure swings elsewhere in the system, so zones stay balanced as other valves open and close.
Holds the Selected Design Flow
Once the valve is set to its design flow, that flow is maintained as differential pressure changes elsewhere in the system. Initial setup is still required at commissioning.
Adjustable 1.3 to 13 GPM
Flow is adjustable across 1.3 to 13 GPM, set manually or by an actuator. The suffix identifies the range, not a single fixed setting.
Glycol Compatible
Rated for glycol solutions to 50 %, covering freeze-protected circuits.
Technical Specifications
| Product Type | Pressure Independent Control Valve |
| Connection Size | 1" |
| Connection Type | Sweat |
| Adjustable Flow Range | 1.3 to 13 GPM |
| Maximum operating pressure | 360 psi |
| Medium temperature range | -4 - 248 °F |
| Maximum glycol % | 50 % |
| Medium | water, glycol solutions |
| Material | DZR brass |
| Series | FLOWMATIC |
| Shipping Weight | 1.1 lb |
Documentation
Related Products
- Caleffi 145663A 13G : FLOWMATIC PICV 1" Female NPT
- Caleffi 145663A 16G : FLOWMATIC PICV 1" Female NPT
- Caleffi 145663A 7G9 : FLOWMATIC PICV 1" Female NPT
- Caleffi 145666A 13G : FLOWMATIC PICV 1" Press
Frequently Asked Questions
What does Caleffi 145669A 13G do?
It is a pressure independent control valve. It holds the design flow rate for its zone regardless of differential pressure changes elsewhere in the system, so zones do not need rebalancing as other valves modulate.
What connection does Caleffi 145669A 13G use?
It is supplied with 1" Sweat connections. Other sizes and connection styles in the range are listed under Related Products.
What is the warranty on Caleffi 145669A 13G?
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:
- Pressure Independent Control Valve
- Product Family:
- Pressure Independent Control Valves (PICV)
- Series:
- FLOWMATIC
- Connection Type:
- Sweat
- Connection Size:
- 1 inch
- Adjustable Flow Range:
- 1.3 to 13 GPM
- Max Operating Pressure:
- 360 psi
- Medium Temperature Range:
- -4 - 248 deg F