chem geek wrote:I have a Pentair IntelliFlow variable-speed pump and when it is at a low-speed for general circulation at around 26 GPM, 1500 RPM, 275 Watts, then it is very, very quiet -- I've measured it at 60 dB in the pump shed and around 65 dB about 1 foot from the pump (normal outdoor "quiet" is around 50 dB). At 48 GPM, 2350 RPM, 865 Watts, it's around 65 dB in the pump shed and 70 dB 1 foot from the pump.
Whereas Richard, if you pop in on this forum any time my pump is 29dB at filtration and 49 dB on backwash but some of that noise is the water and not the pump.
1700 RPM at 59 watts 29dB @1 meter (30 US gallons)
2850 RPM at 274 watts 49db @ 1 meter (55 US gallons)
Yep, showing off Lol.