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What's wrong with Taco?

GW Member Posts: 4,676
Hi Guys,

Once again I'm a little stumped. I talked to my Viessmann rep today just bouncing some boiler pump ideas off of him, and he made it pretty clear he didn't like the Taco... is there something I'm missing? It seems like the 0014 would be ideal form the Vitodens 15-60 (boiler pump only, into the LLH). He recommends the 26-99, but that seems a little beefier than what the Viessmann flow data requires.

How about the 009? Again this seems like a prefect pump for Climate Panel system, as it offers high head and low flow, right in the sweet spot for a system like this. People call the 26-99 a "high head" pump, but to me it just seems like a "big" pump- what is so "high head" about it? It has a pretty average curve, just juiced up.

Thanks again for the help-

Gary Wilson

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Gary Wilson
Wilson Services, Inc
Northampton, MA
[email protected]


  • Dan Peel
    Dan Peel Member Posts: 431
    Everybody gets comfortable

    With one circ brand or another. If it fits on the curve it'll deliver the volume. Viessmann and Grundfos seem to have a close relationship world wide. Dan

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  • Gregg Jackson
    Gregg Jackson Member Posts: 55
    taco 009


    I agree with you on the 009. It is perfect for climate panel systems and the high head / low flow situation. I did have a problem with a 009 squealing on a climate panel job. The sound was coming from the outlet side pipe and it wasn't the check valve so we think it was velocity noise? Replaced it with a 007 and its run fine and quiet ever since.


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  • Josh M.
    Josh M. Member Posts: 360

    I would put in the optimal pump for the curve that you are looking for regardless... Taco is a wonderful pump and they back up their product.
  • hr
    hr Member Posts: 6,106
    Doesn't Grundfos's

    new facility in PA have Viessann equipment? HB would know :)

    Rumor I heard was Dr. V has a close working partnership with Grundfos corporate. Old hunting buddies? But you know how rumors are.

    I, too, think it is more of a personal preference issue with the person you spoke with.

    hot rod

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  • todd s
    todd s Member Posts: 212

    In our area, no one uses Grundfos. Back in the eighties a whole bunch went out that had the removable "nickel" on them. Everyone has their story of running around the first cold night to "give'em a spin". We switched to Taco back then and never looked back, very reliable. I wish they would come out with a 3 speed like Grundfos though.
  • Steve Ebels
    Steve Ebels Member Posts: 904
    Pump preference

    My personal experience has been better with Grundfos. We do a lot of outdoor wood boiler installs and a 26-99 or 0011 is quite common for the main loop feeding the house along with other buildings. We use bronze 0011's and regular cast housing Grunt's. There is a stack of burned out 0011's in my shop, why I save 'em, I don't know......
    To date, not a single Grundfos has failed. This is admittedly, a harsh environment for a pump to operate in. Open systems ALWAYS build up gunk, goo and other shall we say undesireable crap. The NPSH is often near 0 psi and these larger wet rotors do NOT like that. For whatever reason, the Grunt's seem to tolerate it better than the Taco's do. I've seldom had a problem with any Taco on a conventional closed system. JMHO
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