Jeff G - PDX

Thank you for the detailed response. Just for clarification, I am trying to understand the information. The existing pump I have is a 2 hp pump with the exact same details at the new one. The only difference that i can see is the 2" intake and output. Both pumps have the same RPMs at 3450 and max amps at 11.2 as well as 230 voltage. Both the old and new replacement pump seem to have impeller dimensions. So, for me not being an expert and I trust your information, how can a pump with the same rpms and HP ratings, produce a higher flow rate? I assume the impeller must have a different vein array to allow? Thanks again for your information, Always something, jG

I have an in-ground Kidney Shaped fiberglass pool. All Sta-Rite filter and pump componets. The Filter and multiport valve have given up the ghost. After being repaired and such, we made the decision to replace the system. When the pool was put in, all 1.5" PVC ran underground. All of the new equipment is Sta-rite, but all the new is 2". So, I have purchased the following system components. Filter: Sta-rate [s8S70]Sta-Rite System 3 Sand Filter - 3.4 SF / 68 GPM Multi Port Valve: Sta Rite [18201-0200]Sta-Rite Multiport Backwash Valve for System 3 DE/Sand Filter Pump: Sta-Rite [P6E6G-208L]Sta-Rite Max-E-Pro Pool/Spa Pumps - P6 Series - Energy Efficient 2 hp Pump Pool Size: 9.5" deep(to water line) Approx. 28000-30000 Gals Integrated Hottub and Pool All of these components are inline with the specifications of my pool and what we had before with the exception of one big detail. The original plumbing is all 1.5" and all of the new items above are 2". Question: What are the ramifications if I neck down from 2" to 1.5" on this new pump? (Planning to run 2" line from Pump to filter as a side note.) Are there any ways I can offset these issues?(ie: Take out the return jet directional balls?, Leave the Hottub inputs open? Etc) Thank you, any assistance will be greatly appreciated. Jeff G Portland, OR

It would appear that JeffT and I are in a similar predicament. I have an in-ground Kidney Shaped fiberglass pool. All Sta-Rite filter and pump componets. The Filter and multiport valve have given up the ghost. After being repaired and such, we made the decision to replace the system. When the pool was put in, all 1.5" PVC ran underground. As Jeff described, all of the new pumps are 2" pumps. So, I have purchased the following system components. Filter: Sta-rate [s8S70]Sta-Rite System 3 Sand Filter - 3.4 SF / 68 GPM Multi Port Valve: Sta Rite [18201-0200]Sta-Rite Multiport Backwash Valve for System 3 DE/Sand Filter Pump: Sta-Rite [P6E6G-208L]Sta-Rite Max-E-Pro Pool/Spa Pumps - P6 Series - Energy Efficient 2 hp Pump Pool Size: 9.5" deep(to water line) Approx. 28000-30000 Gals Integrated Hottub and Pool All of these components are inline with the specifications of my pool and what we had before with the exception of one big detail. The plumbing is all 1.5" and all of the new items above are 2". Question: What are the ramifications if I neck down from 2" to 1.5" on this new pump? (Planning to run 2" line from Pump to filter as a side note.) Are there any ways I can offset these issues?(ie: Take out the return jet directional balls?, Leave the Hottub inputs open? Etc) Thank you, any assistance will be greatly appreciated. Jeff G Portland, OR