Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 24

Thread: Skimmer question....

  1. Back To Top    #1

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Skimmer question....

    Our pool installer told us that when we vacuum, we close the the skimmer that doesn't get the vacuum hooked up almost completely to add more suction to the skimmer where we vacuum from. Also, I've noticed that we have to play with how much we close that same skimmer to make sure the other skimmer actually pulls debris in...make sense.

    But, after re-opening the pool this year, it seems that the skimmer farthest from our pump (the same one we vacuum out of) barely even has any suction any more. It doesn't matter how much we adjust the other skimmer, it just doesn't seem to pull like it used to. Any ideas or suggestions? Could it be the pump? I am looking to replace it anyway.
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Skimmer question....

    Have the pressure readings change? It would be odd for the pump to be the problem.

    How are things plumbed?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Pressure readings generally stay the same other than the rise when it needs to be backwashed.

    I have 1 line for the skimmers and main drains, and my returns are split into two lines. The installer did it that way so I could turn the valve to cut flow to 3 of the returns which increased the pressure to the return that we connected the Polaris 360 to...
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  4. Back To Top    #4
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Skimmer question....

    So where are the valves to adjust between the 2 skimmers and the floor?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  5. Back To Top    #5

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by jblizzle View Post
    So where are the valves to adjust between the 2 skimmers and the floor?

    Those only have shutoff valves. The adjustments I was referring to for the skimmers and the vacuum are just the little doors (for a lack of a better term) at the bottom of the skimmer itself. Where you can close off the suction.... under the skimmer basket when you take it out...does that make sense?
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Skimmer question....

    I know what doors you are talking about. Do you just have a flap on the bottom of the skimmer or do you have a float diverter?
    I still do not understand the way the pipes are done.

    Is there 1 suction pipe at the pump? Where is the floor plumbed to?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by jblizzle View Post
    I know what doors you are talking about. Do you just have a flap on the bottom of the skimmer or do you have a float diverter?
    I still do not understand the way the pipes are done.

    Is there 1 suction pipe at the pump? Where is the floor plumbed to?

    Yes, the flap. Yes there is just one suction pipe at the pump. After it goes through the filter, it hits the return pipe that splits into two pipes. One of those runs 3 returns, while the other runs straight to 1 return that we connected the polaris too. This was done so we could increase pressure to the polaris.

    Why? I don't know. That's just what the installed told us after he was done and was showing us how to operate everything.
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  8. Back To Top    #8

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Something like this (did this quick so bare with me)Pool schematic.jpg
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  9. Back To Top    #9
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Skimmer question....

    Uh Oh ... I seem to not be seeing the pipes

    To be sure, the returns feel normal and the filter pressure seems the same as last year?
    Just you do not think there is as much suction from the far skimmer.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  10. Back To Top    #10

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by jblizzle View Post
    Uh Oh ... I seem to not be seeing the pipes

    To be sure, the returns feel normal and the filter pressure seems the same as last year?
    Just you do not think there is as much suction from the far skimmer.
    No pipes would be a good reason I have no suction...haha!!

    Yes, that is correct. I can shut the door on the skimmer closest to the pump and the far skimmer still doesn't seem to increase suction much...
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  11. Back To Top    #11
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Skimmer question....

    Well, if you close the first skimmer and the 2nd one does not increase, does the filter pressure and return flow drop? Or where is the floor plumbed in this situation? Can you close off the floor also?

    Does not seem like this setup is very ideal.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  12. Back To Top    #12


    Join Date
    Sep 2014
    Location
    Bakersfield, CA
    Posts
    155

    Re: Skimmer question....

    When Jason refers to the floor I think he means the main drain. Does your pool have a main drain? If so it must be plumbed to one of the skimmers, and most likely to the skimmer closest to the pump. If this is the case closing the flap on that skimmer's float valve won't do much as the pump will just pull more water thru the second hole underneath the float valve that goes to the main drain.
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

  13. Back To Top    #13

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by jblizzle View Post
    Well, if you close the first skimmer and the 2nd one does not increase, does the filter pressure and return flow drop? Or where is the floor plumbed in this situation? Can you close off the floor also?

    Does not seem like this setup is very ideal.
    Honestly, I haven't closed it and then looked at the filter pressure or return flow. I will check on that. No, I can't close the floor. Yeah, I didn't think so either but it is what it is now

    Quote Originally Posted by prs View Post
    When Jason refers to the floor I think he means the main drain. Does your pool have a main drain? If so it must be plumbed to one of the skimmers, and most likely to the skimmer closest to the pump. If this is the case closing the flap on that skimmer's float valve won't do much as the pump will just pull more water thru the second hole underneath the float valve that goes to the main drain.
    Yeah, I understand what he means. Actually has the two main drains that are noted in the beautiful artwork above...lol. No, if you close the flap on the skimmer closest to the pump, the other skimmer would suck your hand down in there hard enough to hurt it if you weren't careful. It doesn't do that now.

    I wish I knew more about the plumbing but it's not something that I saw a lot of as it was mostly done while I was at work.
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  14. Back To Top    #14


    Join Date
    Sep 2014
    Location
    Bakersfield, CA
    Posts
    155

    Re: Skimmer question....

    Is it possible both your skimmers are plumbed to a main drain? Do they both have two holes in the bottom?
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

  15. Back To Top    #15

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Both skimmers have one open hole with the flap and another hole that stays plugged. I can take a picture if it would help
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  16. Back To Top    #16


    Join Date
    Sep 2014
    Location
    Bakersfield, CA
    Posts
    155

    Re: Skimmer question....

    Yes please post a picture. Typically if there is only one suction line running from the pool to the pump then the main drain is connected to the skimmer, and then the suction line goes from the skimmer to the pump. A flap or a adjustments on a float valve are then used to control how much water is pulled into the skimmer from the main drain vs how much water is pulled down thru the skimmer basket.

    If sounds like you have two skimmers that each have a suction line and those lines join together underground, and you control how much is pulled from each skimmer by adjusting the flaps on the suction port of each skimmer.

    If the second hole in each skimmer is plugged then the main drains don't go to the skimmers and must be joined to the suction line underground. This assumes you are getting suction at the main drains, have you checked? If this is true you have no control on how much water is pulled thru the skimmers because even if you close off a flap more water could be pulled from the main drains rather than the other skimmer. You would have to put something over the main drain covers to restrict the flow.

    If this is how the pool is plumbed then the builder really screwed it up.
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

  17. Back To Top    #17

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by prs View Post
    Yes please post a picture. Typically if there is only one suction line running from the pool to the pump then the main drain is connected to the skimmer, and then the suction line goes from the skimmer to the pump. A flap or a adjustments on a float valve are then used to control how much water is pulled into the skimmer from the main drain vs how much water is pulled down thru the skimmer basket.

    If sounds like you have two skimmers that each have a suction line and those lines join together underground, and you control how much is pulled from each skimmer by adjusting the flaps on the suction port of each skimmer.

    If the second hole in each skimmer is plugged then the main drains don't go to the skimmers and must be joined to the suction line underground. This assumes you are getting suction at the main drains, have you checked? If this is true you have no control on how much water is pulled thru the skimmers because even if you close off a flap more water could be pulled from the main drains rather than the other skimmer. You would have to put something over the main drain covers to restrict the flow.

    If this is how the pool is plumbed then the builder really screwed it up.
    -I'll get a picture in just a bit.
    -The main drains have suction because the leaves always get sucked down to the main drains and have to be swept off.
    -But I can assure you that when you close the flap in the closest skimmer, the farther skimmer has a lot more suction. That's how we used to get more suction with the vacuum hose hooked up to the farther skimmer.
    -So far, the pool plumbing has worked as advertised. The pool stays clean, it's easy to air lock the pipes when closing, etc...This is the first problem that we have had and I'm not sure it's even a big problem.
    -I know there is only one open hole and one plugged in each skimmer because when we close, we only have to plug the one open hole with a gizmo for the winter

    I do see an error I made. There ARE 2 lines going to the pump. I was thinking there was only an on/off valve on the returns but I was incorrect.
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

  18. Back To Top    #18


    Join Date
    Sep 2014
    Location
    Bakersfield, CA
    Posts
    155

    Re: Skimmer question....

    Maybe one suction line goes to the main drains and the other goes to the skimmers? This would make a lot more sense and takes your builder off the hook. You could open/close each valve in turn and find out where they go. If you do have a line that is for the main drains only you'll likely need to shut it off when vacuuming.

    To avoid confusion we usually refer to the lines after the filter going to the pool as the "returns". The "suction" lines go from the pool to the pump.
    Cheers, Peter
    20,000 gal, 52'x17' kidney shaped IG, Pebble Tec, IntelliPro P6E6VS4H-209L pump. Intellichlor IC40 SWG.
    300 sf Sta-Rite System 3 cartridge filter. Poolvergnuegen 4-wheel suction pool cleaner. TF-100 test kit.

  19. Back To Top    #19

    In the Industry

    Join Date
    Jun 2015
    Location
    Wildomar, California
    Posts
    423

    Re: Skimmer question....

    I know that I am late to this discussion but is it possible that you have old American Products skimmers? They only have one hole for suction and they divide the suction between skimmer and main drain by a diverter valve that fits into the suction hole and can turn to adjust the suction A lot of older California pools have them.

  20. Back To Top    #20

    Join Date
    May 2012
    Location
    Henderson, TN
    Posts
    218

    Re: Skimmer question....

    Quote Originally Posted by prs View Post
    Maybe one suction line goes to the main drains and the other goes to the skimmers? This would make a lot more sense and takes your builder off the hook. You could open/close each valve in turn and find out where they go. If you do have a line that is for the main drains only you'll likely need to shut it off when vacuuming.

    To avoid confusion we usually refer to the lines after the filter going to the pool as the "returns". The "suction" lines go from the pool to the pump.
    Yes, I'm sure that's how it us plumbed. We haven't had a need to shut off the mains t vacuum in the past. I mean, if we have a separate line that runs both skimmers, then shutting the flap in the closest skimmer would obviously give more suction to the farther skimmer. That's the way it has worked for 3 years, but is having issues this year. Yeah, I always refer to the lines leaving the filter going to the pool as returns. And usually refer to the others as suction.

    Quote Originally Posted by OldPoolMan View Post
    I know that I am late to this discussion but is it possible that you have old American Products skimmers? They only have one hole for suction and they divide the suction between skimmer and main drain by a diverter valve that fits into the suction hole and can turn to adjust the suction A lot of older California pools have them.
    The skimmers have their own line. They aren't connected to the mains. The only adjustment to suction in the skimmer, is the flap that simply covers the suction hole.
    35000 gallons
    Hayward Sand Filter
    Jandy AquaSeries Ei Pure Salt System
    IG
    Vinyl
    Pentair Superflow 1hp

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •