Pump making noise

Rick T

Well-known member
Apr 28, 2019
95
Houston, TX
I have a Pentair InteliflowXF variable speed pump. Yesterday I noticed it making a loud mechanical hum. The noise changes with RPM. I was worried about running it, perhaps bad bearings. Any thoughts?
 

Rick T

Well-known member
Apr 28, 2019
95
Houston, TX
Just checked my receipt. Tomorrow is the 1 year mark from install. Called and they said parts but not labor still covered! This is my 2nd variable speed intelliflo pump. The 1st one only lasted 2 years. At $1500 a pop it gets expensive.
 

1poolman1

In The Industry
Jul 14, 2014
30
Sacramento
Bearings usually go bad due to a leaking seal. For a seal to go bad in that short a time is usually the result of bad water chemistry or running the pump dry. Occasionally the seal-plate can be damaged, but that is rare. A motor shop can easily replace the bearings in the motor. I've done it several times and I'm not a motor shop. Variable-speed motors are much easier to work on than standard motors. There are warnings about the strength of the magnets that should be heeded, but the job is a straight forward bearing replacement. If the drive is functioning correctly, it is worth a try.
 

Rick T

Well-known member
Apr 28, 2019
95
Houston, TX
Brought pool guy out. Duplicated the noise. He did an internet search and said if I sprayed silicone lubricant up the underside of the pump the noise would go away. I did that and no more noise.
 

JamesW

TFP Expert
Mar 2, 2011
16,599
The motor is totally enclosed. Spraying silicone on the outer casing isn't going to do anything.

The seal might be squeaking or maybe the bearings.

If it's the seal, it might smooth out on its own as the seal wears down.

If it's the bearings, it's only going to get worse.
 

Rick T

Well-known member
Apr 28, 2019
95
Houston, TX
I agree. It sounds more like a seal noise. There is an opening underneath the motor where if I curl the straw hose up under there and spray the noise went away. At least it did for a few weeks.
 

JamesW

TFP Expert
Mar 2, 2011
16,599
For some reason some of the new seals squeak. Sometimes the squeaking goes away as the surfaces polish themselves by rotating against each other.

Keep an eye out for leaks and replace the seal if necessary.

I would get a seal on hand so that you can replace it immediately if necessary.