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Thread: Safety question about water intake

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    Safety question about water intake

    I've made a diagram of my pool's equipment, which is vital to understanding my question:

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    Take a look at the two green arrows. I have two lines coming in from the pool (bringing water into the pump), and there is a valve at the top which allows me to close either one, or use both.

    I'm not sure exactly where the left one sucks water from the pool. Presumably the skimmer.

    But I just discovered that if I open the right side one, one of the jets/nozzles in my pool's wall sucks water too. It looks like a usual small nozzle. But here's the safety issue: I put my hand in front of it, and I experienced a LOT of instant suction -- so much that it actually hurt my hand, as my hand was drawn towards its suction.

    This concerns me greatly, since I've got kids swimming in the pool. If a kid puts their hand on that, it could be strong enough to injure them.

    Is it safe for me to set the valve so that that line is fully closed? Should I leave it slightly open so that there's a bit of water flow? Is there any downside to that?

    I don't fully understand the physics and construction of it all, so please advise me like a complete newbie.

    Secondary question: at the bottom of the deep end of the pool is that circular thing (don't know what the name is). Is it possible/likely that the right line is also sucking from there? Or the left one? How would I know? (I'm sure you understand my concern of diving down to the deep end and getting too close to a strong vacuum.)
    Los Angeles (San Fernando Valley)
    15k gallon in-ground (IG) pool (I believe it's plaster)
    DE filter (Heyward), using cellulose instead of DE
    Jandy APURE1400 3-port salt cell

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    Mod Squad jblizzle's Avatar
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    Re: Safety question about water intake

    Sounds like it is actually a dedicated suction line for a suction cleaner. When I had my pool replastered, they put an eyeball in it too before I realized what the line was actually for.

    I would certainly leave the line closed. You could also add the little flapper adapter for a cleaner that would screw in instead of the eyeball that would be closed and not allow suction if the valve got opened.
    OR
    I was looking into finding a spa suction cover that I would screw into the wall fitting so that I could keep both suction lines open, but the cover would make it safer. Although I now use a suction cleaner so i never ran the cover to bed.

    The thing on the floor is a floor drain. Since you only have 2 suction lines at the pump, if you look under your skimmer basket you will either see 2 holes or you will see a float diverter. If you have the diverter, you can remove it and see the 2 holes. One hole is from the floor and the other is the line to the pump. In order to get any suction from the floor, you need the float diverter installed to force the suction to the floor. There is a little slide flap that adjusts the amount of suction from the floor.

    Note, you should not really be able to ever feel the suction at the floor to avoid the entrapment issue. Ideally there are 2 drains on the floor, but at minimum the cover should be designed to lower the entrapment possibility.
    Jason, TFP Moderator
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    Mod Squad YippeeSkippy's Avatar
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    Re: Safety question about water intake

    Is the drain in question low down on the pool wall side or floor of the pool? It sounds like your Main Drain, and the valve alters the water suction between the skimmer and the main drain. If your pool is older it may be missing a cover that is now a requirement for pools for safety-
    Safety Tips Pool Safely
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    Re: Safety question about water intake

    Re: the eyeball and flapper adapter, great, thank you. I might go looking for one, just as a safety precaution. But meanwhile I'll leave that line closed.

    Interesting theory that it might be for a suction cleaner. That would make sense. The vacuum is certainly strong enough. I didn't take a close enough look at the eyeball to see if it can be unscrewed and used to plug-in a suction cleaner (or a flapper for safety).

    Under my skimmer basket, I see two holes. The right one goes to the pump. (I know, because this is where I plug in my vacuum hose.) The left one doesn't have any suction, and to my eye, actually looks closed/blocked.)

    I've been down in the deep end near my floor drain and have never felt any suction there, however, I'm just trying to be extra careful, since I just discovered that valve that's producing high pressure suction in one of the eyeballs on the side of the pool. Don't want to make a mistake with something like that!

    @YippeeSkippy, not sure which drain you're asking about. The first issue (the valve opening a strong vacuum) goes to an "eyeball" in the side/wall of my pool. I've got about 4, but only 1 shows this strong vacuum that I mentioned. The others are return jets pushing water out into the pool.

    @YippeeSkippy -- saw your link in your sig -- love your pool!

    So, to conclude: no harm in closing the line that's leading to the (presumed) suction cleaner eyeball, and I'll go looking for a safety flap to put on it if I can find such a thing. Correct?
    Los Angeles (San Fernando Valley)
    15k gallon in-ground (IG) pool (I believe it's plaster)
    DE filter (Heyward), using cellulose instead of DE
    Jandy APURE1400 3-port salt cell

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    Mod Squad jblizzle's Avatar
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    Re: Safety question about water intake

    Correct. I would investigate the 2nd hole further to see if is it truly blocked or if it is open to the floor. And if open, get a float diverter.

    Google: "pool vacuum safety wall fitting"
    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
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    Re: Safety question about water intake

    Took a swim today and found this:

    The "eyeball" jets into the pool all look like eyeballs, are fixed, and have nothing I can attach anything to. All of these shoot water back into the pool.

    But the one in question, the one I was concerned about, it has threading on it -- indicating it absolutely was designed for something to be plugged into it.

    OK. I will want to find a safety cover for this.
    Los Angeles (San Fernando Valley)
    15k gallon in-ground (IG) pool (I believe it's plaster)
    DE filter (Heyward), using cellulose instead of DE
    Jandy APURE1400 3-port salt cell

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    Killer95Stang's Avatar
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    Re: Safety question about water intake

    [IMG]YXBwaWQ9eWlzZWFyY2g7Zmk9Zml0O2dlPTAwNjYwMDtncz0wMEEzMDA7aD0y Mzk7dz0zMDA-/http://i.ebayimg.com/images/g/Zw0AAOSwHnFVixDt/s-l300.jpg.cf.jpg[/IMG]

    Should look like this
    Pool done!! (backyard = work in progress) 32' x 19' inground freeform with 7' spa, baja step w/ (2) bubblers, stonescapes mini pebble finish, rock waterfall feature, 12" raised bond beam, Intelliflo VS, Whisperflo feature pump, (3) 5G Color LED's, FNS + DE 60, 400K Master Temp, Easytouch 8 w/ remote, Intellichlor IC40, Vision Classic Ceramic Kamado smoker, Margaritaville DM1000!!! Party Coming Soon!!
    TF-100 Test Kit w/ Speedstir

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    Re: Safety question about water intake

    Yup, that looks right. I'll just make sure the opening diameter matches then I'll order one.

    (Corrected URL for future visitors: Redirect Notice)
    Los Angeles (San Fernando Valley)
    15k gallon in-ground (IG) pool (I believe it's plaster)
    DE filter (Heyward), using cellulose instead of DE
    Jandy APURE1400 3-port salt cell

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    Mod Squad YippeeSkippy's Avatar
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    Re: Safety question about water intake

    Interesting... I've never seen that device before.
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

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