Delta PG PLUS-25 - Manual (Page 24)

18
Domestic Piping
Fig. 7: PERFORMANCE PLUS
With Recirculation
1. Mixing valve with check valve
2. Flow check valve
3. Shut off valve
4. Backflow preventer or pressure reducing valve* 6. Thermal expansion tank
7. Circulator (controlled by aquastat)
8. Domestic drain valve
9. Vacuum breaker*
Note: All shut off valves
shown in this figure must be
closed when siphon draining
the PERFORMANCE PLUS
* Optional devices may be required by local Codes
Fig. 8: Multiple Units Installation With Recirculation