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Thread: Pentair Rainb #300 off-line chlorine feeder check valve

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    Pentair Rainb #300 off-line chlorine feeder check valve

    I recently installed this feeder. The installation instructions say I should also install an optional R172323 check valve on the inlet side.
    My installation taps in just before de filter with outlet downstrean of heater check valve.

    Do I need the "optional" R172323.

    Thanks
    18' x 38' vinyl liner, 28k gallons, Hayward superpump SP2615X20, Hayward DE filter DE3620,variflow valve

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    Mod Squad Bama Rambler's Avatar
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    Re: Pentair Rainb #300 off-line chlorine feeder check valve

    While I can't say if you Need the check valve it's just good practice to install one when there is a possibility of any backflow. If it were me, I'd install 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
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