- May 3, 2007
- 16,895
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
When two pumps are run in parallel, the pressure and head loss will increase because the flow rate is higher through the plumbing (2 vs 1 pump). But higher pressure just means higher head loss which in turn lowers efficiency. It doesn't mean that the pumps are in any danger. In fact, just the opposite. The operating points of both pumps will shift to left and the total pump power will be less than the sum of when each pump was run by itself.
The only situation that could cause problems when running both pumps is if the Intelliflo RPM is so low that the pump cannot produce the flow rate to open the check valve (i.e. dead head) because of the high pressure from the jet pump. In this case, the PB may be right. But if the RPM is high enough, it will open the check valve.
The only situation that could cause problems when running both pumps is if the Intelliflo RPM is so low that the pump cannot produce the flow rate to open the check valve (i.e. dead head) because of the high pressure from the jet pump. In this case, the PB may be right. But if the RPM is high enough, it will open the check valve.