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Thread: where should I cut the PVC to replace pump?

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    hanesian's Avatar
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    where should I cut the PVC to replace pump?

    OK, I will be replacing my current non-fucntioning pump with a new one, and would appreciate opinions from the peanut gallery as to where to best cut the existing plumbing. I have an idea but would like to hear other opinions before marching ahead. Here are photos of the plumbing going into the existing pump.







    Do you think the diagonal travel offset line would be the best place, as highlighted below?







    I've done pvc plumbng work before, but not often involving a choice of locations to cut, so suggestions are warmly welcomed.

    Thanks!
    25,000 gallon, vinyl IG, Pentair Superflo 1 HP Dual Speed pump, Hayward S-240 sand filter, SWG, Raypak M206A heater, Polaris Pool Cleaner 280

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    Mod Squad zea3's Avatar
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    Re: where should I cut the PVC to replace pump?

    The section you are pointing at in picture 2 looks like it would have the most available gluing surface, though I would cut flush with the sweep elbow closest to the valves, add a union and go from there.
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    Re: where should I cut the PVC to replace pump?

    I would cut back between the four way fitting and the first 45.

    Cutting as shown in your photo probably won't allow you to get the pump in exactly the same place it is now. My suggestion will allow the pump to be in the exact same location, just with the 45 section a little closer to the 4 way fitting.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: where should I cut the PVC to replace pump?

    Wherever you cut, this time, install a union! You're running out of space.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: where should I cut the PVC to replace pump?

    +1 what Jasonlion and Richard320 both said.
    Dave S.
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    Re: where should I cut the PVC to replace pump?

    Thanks for the helpful suggestions. I really appreciate it!

    As a relatively inexperienced PVC guy, I'm trying to understand how I could install a union between the 4 way fitting and that first 45 section, much less move the first 45 closer to the 4 way fitting. I currently have only about 2" of clear pipe showing between that 4 way and the 45 fittings, and best I can determine it looks like a union joint fitting is about 3 1/2" wide, not to mention the unknown width of the adapter fittings for the pipe ends leading into the union. Wouldn't this push the first 45 further away from the 4 way, and make it harder to keep the same pump position?

    I'm probably asking a really stupid question as my PVC experience is more oriented to gluing and fitting pieces together but not planing out the layout, so I apologize if I'm missing something obvious.

    Would you mind elaborating in more detail of the process for this Pooh of very little brain?

    Thanks again!
    25,000 gallon, vinyl IG, Pentair Superflo 1 HP Dual Speed pump, Hayward S-240 sand filter, SWG, Raypak M206A heater, Polaris Pool Cleaner 280

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    Re: where should I cut the PVC to replace pump?

    I would put the union very near the pump and replace the 45's with 90's to give you more room.
    Dave S.
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    Re: where should I cut the PVC to replace pump?

    If you want a union, here is how I would do it: Start at the four way fitting, cut the pipe that is sticking out near the 45 degree fitting. Attach a new 45 degree fitting, a short section of pipe, the union, another short section of pipe, another 45, and a final short section of pipe leading to the pump.

    The new 45 is closer to the four way fitting, the straight section between the two 45s has room for the union, and the pipe from the final 45 to the pump is now slightly longer than it used to be.

    As always, measure several times, cut once.
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    Mod Squad woodyp's Avatar
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    Re: where should I cut the PVC to replace pump?

    How about a stretch of some flexible PVC?
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    Re: where should I cut the PVC to replace pump?

    How I would do it...
    Where-to-cut-PVC.jpg

    If there is no room for union with 45's during the dry-fit, put the union in the area between the two 45's, or use 90's.
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    Re: where should I cut the PVC to replace pump?

    Thank you to all who offered suggestions and opinions. Much appreciated!

    I now understand I have several viable options, so I'll figure out one and adjust if needed.

    Thanks again! What a great resource this site is. Once I get through this project and have a minute I'll be upgrading to a paid supporter. Totally worth it!
    25,000 gallon, vinyl IG, Pentair Superflo 1 HP Dual Speed pump, Hayward S-240 sand filter, SWG, Raypak M206A heater, Polaris Pool Cleaner 280

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    Re: where should I cut the PVC to replace pump?

    Remember to clean all the joints and glue them. What ever you do you want it to be easier to work on the next time around. Good luck.
    210k gallon pool, IG Plaster, (2) marathon 7.5 hp motors, (6) Triton sand filters, Test Kit Guardex 4-in-1 Plus DPD & Taylor K-2006, Baby pool 6in deep round with stand alone sand filter.

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    Re: where should I cut the PVC to replace pump?

    Just circling back to report final results and thank everyone who offered help again. I ended up going with the two 90's for simplicity's sake, and as discussed added a union near the pump to make future work easier.

    Success!

    photo (5).jpg


    May not win any awards, but it works! (ignore my work glove lying on the 4 way)

    Thanks again!
    25,000 gallon, vinyl IG, Pentair Superflo 1 HP Dual Speed pump, Hayward S-240 sand filter, SWG, Raypak M206A heater, Polaris Pool Cleaner 280

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    Re: where should I cut the PVC to replace pump?

    No leaks = winner!

    Nice job. Did you do that in the rain yesterday? Got rain and mist all day up here in our neck of the woods. Even more of an accomplishment.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
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    Re: where should I cut the PVC to replace pump?

    I got most of it done during lulls in the rain, or during a couple of short intervals of sprinkles!

    Need to get this pump working/pool open before it warms up too much and algae starts growing!
    25,000 gallon, vinyl IG, Pentair Superflo 1 HP Dual Speed pump, Hayward S-240 sand filter, SWG, Raypak M206A heater, Polaris Pool Cleaner 280

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    Re: where should I cut the PVC to replace pump?

    Good job, you certainly cleaned up that section of plumbing.
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