The Caleffi 577870A is a 577 XF magnetic dirt separator with a 1-1/4 in union female connection and a composite/brass body, engineered to capture suspended dirt and ferrous particles from hydronic systems using a rare-earth magnetic field.
Product data compiled from Caleffi North America technical documentation. Last reviewed June 2026.
Key Features
Magnetic Ferrous Capture
Rare-earth neodymium magnets capture iron-oxide and ferrous debris down to microscopic size.
5 Micron Dirt Removal
Separates non-ferrous suspended particles down to 5 micron from the system fluid.
Removable Magnet
The magnet is removable so trapped ferrous debris releases and purges through the drain during blowdown.
Online Cleaning
Captured debris is flushed without draining or shutting down the system.
1-1/4 In Union Female Connection
1-1/4 in union female connection sized for the application.
Composite/Brass Construction
Composite/Brass body with stainless and EPDM internal components for hydronic service.
Technical Data
| Function | Magnetic dirt separation |
|---|---|
| Series | Caleffi 577 XF |
| Connection | 1-1/4 in union female |
| Body material | Composite/Brass |
| Magnet | Neodymium rare-earth |
| Dirt separation | Non-ferrous debris to 5 micron |
| Maximum operating pressure | 45 psi |
| Medium temperature range | 32 - 195 °F |
Documentation
Technical brochure- Instruction sheet
- Instruction sheet
- Sell sheet
- In-depth guide
- In-depth guide
- Submittal data
Related Products
Frequently Asked Questions
It captures suspended dirt and ferrous particles from the system fluid, using a rare-earth magnet for iron-oxide and a separation chamber for non-ferrous debris down to 5 micron.
No. This is a dirt and magnetic separator. For combined air separation as well, use a DISCALDIRTMAG model.
45 psi maximum operating pressure with a medium temperature range of 32 - 195 °F.
- Type:
- Magnetic Dirt Separator
- Series:
- 577 XF
- Magnetic Separation:
- Yes
- Body Material:
- Composite/Brass
- Connection Type:
- Union
- Connection Type:
- NPT Threaded
- Connection Size:
- 1-1/4 in
