Ok, I have a pool (not the one in my signature block) where the motor was changed on a pump and now it is super noisy. The pump pushes water to two water features. When I have the valve set to send water to BOTH features simultaneously, it makes a very loud sound. If I move the valve to only send water to ONE of the features, it sounds perfectly fine. This works fine no matter which water feature I send it to, as long as it is only one. If I allow even a little water to go the second feature, it starts making a noise. The noise increases the more I open the valve until i get past the midpoint and start shutting off flow to the other water feature - at which time the noise begins to subside. Any ideas? I am going to try to post a picture of the pump set up. If it does not post, it is a whisper flow pump with a Force 1 motor. Outflow is a 14 inch straight to a 90 degree turn into an immediate two setting valve. The valve is attached to the 90 degree elbows. After the elbows off the valve, there is a 15 inch straight pipe to another 90 degree elbow that goes down to the underground. Hope this works and any advice would be greatly appreciated. Thanks PoolSchool for the opportunity.
Pump too noisy
- Thread starter MiklRngr
- Start date
- May 3, 2007
- 18,088
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
Sounds like the pump may be operating near run out and could possibly be cavitating. If the total head loss in the plumbing is too low, the pump operates too far to the right on the head curve and bad things can happen such as unbalanced loads on the motor shaft and cavitation in the impeller.
From the picture, it looks like the two return lines are larger pipe than the suction line which makes cavitation more likely. If you want this to work without too much investment, you need to have a throttling valve on either the pump outlet or both of the feature lines.
From the picture, it looks like the two return lines are larger pipe than the suction line which makes cavitation more likely. If you want this to work without too much investment, you need to have a throttling valve on either the pump outlet or both of the feature lines.