The Caleffi NA10826 is a low-lead brass full-port isolation ball valve with 1" 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 1" 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 | 1" 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 130600A – 1" Flo-Set 130 fixed orifice balancing valve
- Caleffi 142261A – 1" 142 series variable orifice balancing valve
Frequently Asked Questions
What is the Caleffi NA10826 used for?
It isolates the inlet and outlet of 1" 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 NA10826 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 NA10826?
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 NA10826 low lead?
Yes. The body, end connections, ball, and stem are low-lead brass C28500.
What is the warranty on the Caleffi NA10826?
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:
- 1 Inch
