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Thread: Anyone using LMI pump for chlorine dosing?

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    Anyone using LMI pump for chlorine dosing?

    Hello,
    I'm in the process of assembling my pool system, and and going to use the BBB method, but wanted a continuous dosing of the bleech as to consistantly maintain the FC level rather than have the swings from too much to too little, I know I will still need to adjust for weather and bather load, but figure it will still be minimal.
    Anyways, I have aquired an LMI P121-158 dosing pump for cheap, but it didn't come with the foot valve or the 4FV (priming valve), and am wondering if I really need these?
    Does anyone have any examples of how these are installed?, pics?
    Any help is greatly appriciated.
    24' round x 54" Tahitian (Sharkline), 1.5HP Sta-rite Pump, 22" 250lb. sand filter with Zeo-best media, Hayward H250FDN heater, Del Clear Ozonator, SWG or Rola-Chem feeder, not sure?, Trident Automatic Pool Cleaner, 100Watt Nightlighter, Underwater light show and fountain, 2" Hard Plumbed.
    Wishin Isa Swimmin!

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    Mod Squad Bama Rambler's Avatar
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    SouthWest Alabama
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    Re: Anyone using LMI pump for chlorine dosing?

    given your suction head from the container to the pump you may not need the foot valve. Keep in mind that those diaphragm pumps can be a bit of a pain to prime. Once primed it should be fine. You can always buy a foot valve later if you find you need it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Anyone using LMI pump for chlorine dosing?

    Thanks for the information, I'm considering buying a Rola-Chem feeder now since I've heard that diapham pumps don't like liquid chlorine all that much.
    24' round x 54" Tahitian (Sharkline), 1.5HP Sta-rite Pump, 22" 250lb. sand filter with Zeo-best media, Hayward H250FDN heater, Del Clear Ozonator, SWG or Rola-Chem feeder, not sure?, Trident Automatic Pool Cleaner, 100Watt Nightlighter, Underwater light show and fountain, 2" Hard Plumbed.
    Wishin Isa Swimmin!

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    In the Industry

    Join Date
    Mar 2011
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    441

    Re: Anyone using LMI pump for chlorine dosing?

    I'd give you an LMI pump for free, but I woudlnt be doing you a favor.

    I prefer stenner pumps to rolachem. Rolachem seem incredibly cheaply made.
    20X40 30,000 gallon gunite pool

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    Re: Anyone using LMI pump for chlorine dosing?

    Stenner pumps are alot more $$$ than the Rola-chem pumps, which is the reason I chose the Rola-chem, I haven't really heard anything bad about them.
    It sucks that I already bought that LMI pump, but I guess I'll just post it on kijiji or ebay or something, use it as a paper weight ha! ha!
    24' round x 54" Tahitian (Sharkline), 1.5HP Sta-rite Pump, 22" 250lb. sand filter with Zeo-best media, Hayward H250FDN heater, Del Clear Ozonator, SWG or Rola-Chem feeder, not sure?, Trident Automatic Pool Cleaner, 100Watt Nightlighter, Underwater light show and fountain, 2" Hard Plumbed.
    Wishin Isa Swimmin!

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    Re: Anyone using LMI pump for chlorine dosing?

    Love my Rola Chem. I use it with a fifteen gallon Carboy!

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    Isaac-1's Avatar
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    May 2010
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    SW Louisiana
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    Re: Anyone using LMI pump for chlorine dosing?

    I have been using an LMI pump since last year for Chlorine, so far so good, I have only had issues with loosing prime a couple of times this winter with the limited circulation going on and pump being turned down to very low levels.

    see my set up here new-metering-pump-project-t22358.html?hilit=lmi%20pump


    Ike
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
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