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Thread: No flow on SWG - how to trouble shoot

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    No flow on SWG - how to trouble shoot

    The no flow light is a steady red on our Mineral springs SWG - I found the video on replacing the sensor, but am wondering if there are trouble shooting steps to take first, before replacing. (the weed whacker has no access to the area )

    We've also had heavy rains, and the pool is turning - I'm thinking I need to SLAM it. Will get new levels tomorrow a.m.
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Mod Squad jblizzle's Avatar
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    Re: No flow on SWG - how to trouble shoot

    Did the flow rate actually drop due to a dirty filter?
    Jason, TFP Moderator
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    Re: No flow on SWG - how to trouble shoot

    I don't know. We have a sand filter, and all was fine at the start of the season. How would I check the filter?
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Mod Squad jblizzle's Avatar
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    Re: No flow on SWG - how to trouble shoot

    What is the pressure reading on the filter? What was it at the start of the season?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: No flow on SWG - how to trouble shoot

    I don't know what it was at the start of the season (Oh, I have SO MUCH to learn), but it is now at 58 - so I'm guessing it needs to be cleaned. Something more I guess I need to learn to do.

    - - - Updated - - -

    I have been backwashing the filter on a regular basis, but perhaps that isn't enough?
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Re: No flow on SWG - how to trouble shoot

    Wow, that's high!!! Mine is about 18 when clean and I backwash when it gets to 22-23. I have a noticeably slower flow when it gets there, but not enough to affect my SWG.
    Pool size: 24000gal inground Vinyl-Taylor k-2006 and k-1766 test kits and-speed stir
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    Mod Squad jblizzle's Avatar
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    Re: No flow on SWG - how to trouble shoot

    That is impossible as a pool pump can not generate that much pressure. You need a new gauge. I highly recommend the liquid filled ones like sold at tftestkits.net

    Do the jets in the pool feel strong? If so, then there must be enough flow and that not be the problem.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: No flow on SWG - how to trouble shoot

    *The return seems as strong as ever - will order the new gauge.
    *I'm wondering if I should continue to slam the pool now, or first replace gauge and get to the the cause of the 'no flow' and correcting it.
    (Clean filter, check sensor?)
    *I know I need to raise the CYA - but probably shouldn't do that until the filter is cleaned, correct?
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Mod Squad jblizzle's Avatar
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    Re: No flow on SWG - how to trouble shoot

    How does the water look? Post test results. You can raise the CYA now, just hang sock in front of return jet.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: No flow on SWG - how to trouble shoot

    The water is looking better, I'm in the process of slamming it - will get levels again this evening and tomorrow a.m. to see where I'm at (will post those numbers in the morning). I back flushed, checked that sensor is installed correctly (was replaced just a year ago, as was the cell) -and sock in front of jet with stabilizer; new gauge has been ordered. I'm not sure what is wrong with the SWG. As I can't afford to have anyone look at it this season, is it possible to simply turn it off and keep the pool balanced with the liquid chlorine (bleach)? I realize this will be more work, but maybe my only option to get through the season. Will save $$ over the winter and have system checked to see if the board or unit needs to be replaced.
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Re: No flow on SWG - how to trouble shoot

    Sure you can just use bleach.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Re: No flow on SWG - how to trouble shoot

    Thanks! For now, I guess that's the plan then. I have to continue to slam (lost more than 1.0 on TC overnight) - I have been using the SWG levels for slamming, but since the SWG isn't generating, should I work with the levels recommended for a non-SWG pool?
    The ph was ok before I started, but is now high, I'm assuming because of the high FC? There is still stabilizer to dissolve from within the nylon, so I won't add anything yet, and hope the CYA comes up a bit. I certainly appreciate all the help. (If it weren't for the therapeutic role the pool has for my youngest children, I think I would have thrown in the towel!).

    a.m. levels
    TC - 20
    TA 110
    PH 8.2
    CH 120
    CYA - 30
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Unhappy Re: No flow on SWG - how to trouble shoot

    BIG mistake! Just realized that I shocked much higher than I should have - based on CYA level! UGH! Some day I might get this all under control!
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Re: No flow on SWG - how to trouble shoot

    Replies in red.
    Quote Originally Posted by what next View Post
    Thanks! For now, I guess that's the plan then. I have to continue to slam (lost more than 1.0 on TC overnight) - I have been using the SWG levels for slamming, but since the SWG isn't generating, should I work with the levels recommended for a non-SWG pool?
    SLAM levels are the same for bleach and CYA pools.
    The ph was ok before I started, but is now high, I'm assuming because of the high FC? Yes, your pH reads artificially with FC>10. There is still stabilizer to dissolve from within the nylon, so I won't add anything yet, and hope the CYA comes up a bit. I certainly appreciate all the help. (If it weren't for the therapeutic role the pool has for my youngest children, I think I would have thrown in the towel!).

    a.m. levels
    TC - 20 Can you please report FC and CC?
    TA 110
    PH 8.2
    CH 120
    CYA - 30
    Quote Originally Posted by what next View Post
    BIG mistake! Just realized that I shocked much higher than I should have - based on CYA level! UGH! Some day I might get this all under control!
    With CYA 30, mustard level is 19FC. Even if you had 20FC, it isn't insanely high, but in future, please remember to use PoolMath to calculate additions.

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    Re: No flow on SWG - how to trouble shoot

    Still at it -


    Levels early this a.m.

    FC 13 (same as last night)
    CC .5 (was 0 last night)
    TA 130 (was 110 last night)
    PH 7.5 (same last evening)
    CYA 30
    CH 120

    Do I need to be concerned about the elevated TA, since the PH is in range?

    Water is indeed looking good, have kept filter on 24x7 and vacuuming (polaris vac sweep); it's been quite overcast, so not much 'loss' due to sun

    So appreciative of the help - and patience….
    Above ground, vinyl 22000, STA-RITE sand filter, swg, upper midwest - in PROCESS of replacing with in-ground - vinyl...

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    Re: No flow on SWG - how to trouble shoot

    Don't worry about TA as long as pH is in range.
    Water crystal clear?

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