The Caleffi NA10825 is a low-lead brass full-port isolation ball valve with 3/4" NPT female x NPT female connections, rated 600 WOG / 150 WSP. It installs on the inlet and outlet of Caleffi 130, 142, and 132A series balancing valves (and other 3/4" FNPT devices) using low-lead close nipples, so the device can be serviced or replaced without draining the system. The extended stem keeps the T-handle operable after the valve body is insulated, with no field-installed stem extension required.
Best For
- Service isolation for Caleffi balancing valves and similar FNPT devices
- Insulated piping where valve handles must remain accessible
- Plumbing and hydronic systems requiring low-lead brass components
- Glycol-based systems up to 50% glycol concentration
Key Features
Extended Stem
The stem clears standard pipe insulation, so the T-handle stays operable with no separate field-installed stem extension.
Full-Port Design
The full-port bore minimizes added restriction through the isolation valve.
Blowout-Proof Stem
Double o-ring stem seals (NBR and FKM) with a PTFE thrust washer and packing ring give bubble-tight shutoff.
Low-Lead Construction
High tensile strength forged low-lead brass C28500 body with low-lead brass ball and stem.
Pre-Assembly Option
Caleffi offers select valves, such as the 116 series ThermoSetter, factory-assembled with NA108 isolation valves.
Technical Specifications
| Series | NA108 |
| Connection | 3/4" NPT female x NPT female |
| Port | Full port |
| Pressure Rating | 600 WOG / 150 WSP |
| Working Temperature Range | -4 to 366°F (-20 to 186°C) |
| Shutoff | Bubble tight |
| Suitable Fluids | Water, glycol solutions (max 50% glycol) |
| Body and End Connections | High tensile strength forged low-lead brass C28500 |
| Ball and Stem | Low-lead brass C28500 |
| Seats | PTFE (2) |
| Stem Seals | Double o-ring, NBR and FKM |
| Handle | Polyamide (PA6.6) T-handle, ABS top cap |
Documentation
Related Products
- Caleffi 130500A – 3/4" Flo-Set 130 fixed orifice balancing valve
- Caleffi 142251A – 3/4" 142 series variable orifice balancing valve
Frequently Asked Questions
What is the Caleffi NA10825 used for?
It isolates the inlet and outlet of 3/4" FNPT devices such as Caleffi 130, 142, and 132A series balancing valves, installed with low-lead close nipples, so the device can be serviced without draining the system.
Why does the Caleffi NA10825 have an extended stem?
The extended stem keeps the T-handle operable after the valve body is insulated, eliminating the separate stem extension that would otherwise be field-installed between body and handle.
What is the pressure rating of the Caleffi NA10825?
The valve carries a 600 WOG-150 WSP pressure rating and shuts off bubble tight. Caleffi lists water and glycol solutions up to 50% as suitable fluids, with a working temperature range of -4 to 366°F (-20 to 186°C).
Is the Caleffi NA10825 low lead?
Yes. The body, end connections, ball, and stem are low-lead brass C28500.
What is the warranty on the Caleffi NA10825?
Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship. ZOT Supply is an authorized Caleffi distributor.
- Type:
- Accessory
- Series:
- NA108
- Connection Type:
- FNPT
- Connection Size:
- 3/4 Inch
