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Thread: Any Stenner pump acid tube swap safety tips?

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    Question Any Stenner pump acid tube swap safety tips?

    Hi -

    A condo complex I am associated with uses 4 Stenner pumps located inside a building - 2 for acid and 2 for chlorine for a pool and spa with a couple of Chemtrol pc2100 controllers. They went in last year and the tubes should be changed soon, (and downsized from a 5 to a 1 or 2). I've viewed the Stenner video on changing pump tubes and it looks pretty straight forward, but I am wondering about the acid pump safety issues. We've noticed that the lines to the tanks, which are outside don't fill completely with fluid, making us think we have some small air leaks, so we are going to change all the ferrules as Stenner says the tubes should be full after a startup period.

    It is recommended to run a buffer solution or water before servicing the pumps, and as they are inside and near other equipment we don't want to have *any* spills. I thought we'd pull the feed tubes and drop them in water, and run the pump continuously until the water was clearly depleted to flush the pumps and then pull everything apart with gloves and eye protection.

    My question is related to the restart when we re-insert the tubing into the (non dilute) acid drums. The tubes will be full of water, and I'm mindful of the "don't add water to acid" mantra. I think the tube will end up being be the site of an exothermic reaction. Should we run the pumps until the lines are dry before reinserting?

    Any other tips for chemical safety during a tube change?

    Central MA Area
    24K kidney
    salt, DE

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Any Stenner pump acid tube swap safety tips?

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Any Stenner pump acid tube swap safety tips?

    Just pull the suction side tubing out of the acid and run the pump until it pumps air and then you can remove the tubing and the pump tube using Google gloves.

    When replacing the tubing just drain the tubing and it'll be fine.
    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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