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Pool skimmer has too much suction after changing to PVC pipe.

I just replaced my pool hoses with PVC plumbing. Everything went good except when I turned the pump on, I noticed that the suction from the skimmer was too strong and the skimmer float was pulled all the way down. I replaced my 1 1/4 inch hose with 1 1/2 inch PVC pipe. Could this be the problem. I have a 1 HP pump and added a new Hayward DE filter. I didn't add DE yet because I wanted to test for leaks since I added new PVC plumbing. Could that be the problem because I didn't add DE to the filter yet.

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  • Pool & Spa Master
  • 1,338 Answers

If you only have a skimmer and no valve to direct suction from the skimmer to he main drain, you will nee to down size your pump, i suggest a hayward 3/4 hp super two pump

Posted on Apr 30, 2013

Testimonial: "Do you mean a PVC type turn off valve that you can put between the skimmer bottom and to the pump suction line?"

  • 7 more comments 
  • Mike
    Mike May 01, 2013

    Do you mean a PVC shutoff valve going to the skimmer and to the pump suction then turn the valve a little to slow suction?

  • Jay Finke
    Jay Finke May 01, 2013

    do not choke off the pump in any way... skimmer to the main drain, you will need to down size your pump

  • Mike
    Mike May 02, 2013

    In you first answer to sent me you said, "If you only have a skimmer and no valve to direct suction from the skimmer to he main drain" what exactly does that mean? I know what the skimmer is but I am lost at what you mean by the main drain. I seen pictures of those who installed shutoff valves under the skimmer pipe and thought you meant to use that valve to slow down the pump's suction.

  • Jay Finke
    Jay Finke May 02, 2013

    it splits the flow. tat way you can pull mor water from the main drain thats on the bottom of the pool

  • Jay Finke
    Jay Finke May 02, 2013

    wait you have a above ground pool ?

  • Mike
    Mike May 02, 2013

    Yes, its a 4' X 15' out of ground pool. Any suggestions?

  • Jay Finke
    Jay Finke May 02, 2013

    I tel my customers to use a 3/4 hayward super pump. or you can add another skimmer and more return lines. you will also need a filter, i suggest a hayward 120. the better you have filter pump and filter system the longer you will get to enjoy the pool. use the pump and filter I suggest, raise the pump off the ground about 1 foot and I think you will find you will gett years and years and years of service.. NO CHLORINE TABS IN THE SKIMMER ! use a floaty and tie it off by one of the return jets. .. best of luck .. jay the pool pump motor repair guy in longwood florida

  • Mike
    Mike May 02, 2013

    Thankyou Jay for all your advice. Much is appreciated.

  • Jay Finke
    Jay Finke May 02, 2013

    remember to mention the type of pool you have and the type of pump when asking Q's .. and hit the helpful button in the top right please


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Posted on Jan 02, 2017

  • 2702 Answers

SOURCE: Hayward Self-Priming Pump with AO Smith 1 HP 56J

the pump must not have any air leaks in the suction side of it,, or it will just **** air and not water,,, water is very heavy you see, however i think its the impeller in the pump thats the problem,,,you should try to put water in the out let of the pump so you fill the pump with water first if its dryed out it may just wear out the impeller before it starts to **** water up, if this still dont work turn off the stop **** and strip out the pump to look at the impeller any wear on it and it will need a new one fitted
i hope this has help you, good luck

Posted on Nov 20, 2009

  • 1902 Answers


You are correct. Your lines are extremely small for this system and the pump is to small for this system. You are going to have to do a total upgrade. from the pump to all the lines. I know this is bad news, but it is a common problem for system that where put in more then 10 years ago

Posted on Jun 01, 2009

  • 297 Answers

SOURCE: Hayward pump hose and intex pool

Im thinking that hot glue would not harden completly in a direct sun situation not to mention the potential mess
What I did was go to my local hardware store and bought rubber o rings ( sorry dont remember what size) put them on the fitting slipped the hose over it and clamped on top of that area. Has been fine all summer

hope you figure it out

Posted on Aug 05, 2009

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When installing a chlorine pack I turned the water supply off and forgot. Hour later noticed the water wasnt moving and went to pump and the skimmer basket was so hot it was melted and smoking. Waited...

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Leaves in the skimmer line and its plugged

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Either way, you can disconnect the pump, and work from there. If the pump was installed correctly there shgould be unions ( fitting that can be reconnected on the pump suction and supply. If not, you can cut the pipes a few inches from the pump and then shorten the remainder to acomodate the length of the union. Glue these in place follow the instructions on the glue can.

Try using a water hose with the water on from the direction of the pump to the pool. see if this does the job. Leaves should be able to be pulled through by the oumop, I suspect somthing larger. Do you have a strainer on the suction line? Have you checked the pool filter?

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Operation my Pentair 2" Pvc, 3 Way Lube Free Diverter

Every valve is unique to the system in which it is plumbed. You cannot specifically say that there is one way to turn a valve and then apply it to your situation. So, there is a way to determine what you need. Three way valves should be plumbed with the water flowing into the valve at what one would recognize as the "leg" of a letter "T".

Assuming the valve is plumbed this way, the source of flow to the other ports is either from the pool/spa or to the pool/spa. for a valve plumbed in front of a pump, the direction is from the pool/spa. For the other 3 way valve, it is to the pool/spa.

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