Pump Efficiency and Head Loss... I’m at a Loss :(

[TxHr]

The larger filter will give you slightly better flow. However, as long as the flow is going to be kept below 50 gpm, I don't think that it's worthwhile to go to a bigger filter.

If it was a new install, I would choose the 100, but I wouldn't pay to replace a working filter.

Thanks again. I’ll talk w/ the PB tomorrow. When we spoke earlier in the week he said he would swap the valve for another. I’m thinking about seeing if he will just change the valve to a 3-way and if he would allow me to swap the DE 60 for a DE 100 and just pay the difference (I’m anticipating approx $300). He has been extremely intrigued with the flow rate/head loss as well. I’m the first heat pump customer he has ever had and if I hadn’t done the heat pump it looks like I may have never gone down this rabbit hole.

One last question, to what degree does an in-line chlorinator restrict flow and raise head?


Thanks,

Brandon

 

[bdavis466]

I've found the multi ports to be horribly restrictive and I agree with the others that you do not need it.

FWIW I'm 31 gpm at 1100 rpm. That's with no multiport and a raypak heater. The same setup was 26 gpm with the multiport in place.

The quad filters are very efficient - more so than the other pentair offerings but their heaters are very restrictive.

 

[JamesW]

I couldn't find a curve for the head loss of the chlorinator.

If you look in the T that goes in the plumbing, you will see a substantial obstruction due to the elbow that goes inside the pipe.

https://www.poolsupplyunlimited.com/Products/Product2/84106_1_2012103182359.jpg

https://www.poolsupplyunlimited.com/pentair-chlorinator-diverter-tee-15-inch-npt-x-2-inch-slip-r172317/84106p1

 

[TxHr]

I just wanted to provide a quick update. My PB came out yesterday and swapped the Pentair Quad DE60 for the 100 and plumbed the pump directly to the filter, removing the MPV. I’m currently out of town, so immediately after the panel was removed from service mode I checked the flowrate via the app. I’m getting 20 GPM @ 1000 RPM with 100% flow being directed to heater and bypass. I’ll report more when I get home next weekend. Thanks again for everyone’s input and suggestions!


Brandon