| 1. | 3" | coupling | (batch) |
| 2. | 2" | coupling | (fill) |
| 3. | 3" | coupling | (return) |
| 4. | 3" | coupling | (suction) |
| 5. | 1/2" | coupling | (thermostat & dilution control) |
| 6. | 1/2" | coupling | (pressure gauge & pressure switch) |
| 7. | 3" | vent | (1"larger than fill line) |
| 8. | manhole | (optional) |