Pump psi since changing out motor and impeller

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  • Last Post 11 April 2020
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BillBob58 posted this 03 April 2020

Changed out bad motor (Century 1hp, 3450 rpm) with exact swap and put new impeller on my Magnum force pump that is identical to the old one. Ordered all from inyoPools, Turned everything back on and my pump psi wont come back up to original psi. It is about approx. half (because my psi guage is broke right now). Back washed it several times, rinsed it but nothing seems to help.  Could the motor be turning backwards? would it still pump some if it was doing that? i hooked it up identically to the old one.

Bill

low-psi
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InyoRob posted this 03 April 2020

The impeller/shaft would not run backwards. Is there any air in the pump strainer or bubbles coming out of the return jets?

BillBob58 posted this 06 April 2020

 on occasion yes , very small amount coming out of jets

BillBob58 posted this 07 April 2020

i am begnning to think the pipe on either side of the inline chlorinator might be plugged. i turned the motor off during the winter and the shaft inside rusted too. but i changed that all out and thought it would all just start right back up like it was..

 

InyoRob posted this 07 April 2020

It's possible that the chlorinator is clogged. Try mixing some warm water and a cup of baking soda. Pour the solution into the chlorinator when the pump is off. Let it sit in there for 10-15 minutes and then turn the system back on. That should free up any clog that was in the chlorinator.

BillBob58 posted this 11 April 2020

    Well that wasnt it, pulled the line on the outgoing side of the inline chlorinator and it was flowing good when i turned the pump on. i am going to try and vacuum the pool tomorrow but i dont think i will have enough suction to do it. Before i do that I will pull the pump away from the housing tomorrow and see if i have something impeding it unless you have more suggesstions. This is perplexing me.

 

InyoRob posted this 11 April 2020

I would replace your pressure gauge so we have a better understanding of what is happening. If the gauge is reading low, there is a clogged line or an air leak. If the pressure is high, there is an issue with the filter. The media may need to be changed.

Check out our article titled "Why Are My Pool Jets Not Working?"

BillBob58 posted this 11 April 2020

 I found the issue with the low psi, when I pulled the motor/pump unit out of the pump cavity, apprantely there was debris under the filter basket and it sucked into the center of the impeller blocking it from the very start when i got it all back together to begin wiith... Because i never had psi to start with i automatically thought maybe i had installed the wrong impeller on it or something. I have good psi now some where around 25 and all is well (right now) at my house.  Thanks for the tips it helped me think through the problem better.

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InyoRob posted this 11 April 2020

That's great news! We really appreciate you coming back and letting us know what fixed the problem. I'm sure it will help a lot of pool owners in the future.

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