circulation pump systems
Schematic structure for frost protection of drinking bowls by a circulation pump system
| 1. shut-off valve | 2. water filter | 3. check-valve / non-return valve |
| 4. pressure reducer | 5. T-piece | 6. shut-off valve ZPS |
| 7. Shut-off valve by-pass line | 8. drain faucet | 9. insulation |
| 10.vent valve | 11. Overpressure safety valve | 12. Pipe trace heating cable |
| 13. Animal bite protection | 14. drinking bowl |
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