Equivalent pump but Taco brand

donedeal

Hi what would be an equivalent pump to replace this but in Taco brand? For some reason all my other pumps are Taco except this one. This Wilo one died out and needs replacing but I'm not sure what an equivalent model would be. It services 1 manifold on my main level, about 800-1000 sq feet.

kcopp

007

Steamhead

005 is closest according to the performance curve. 007 is a bit more.

What type of radiation is on that zone?

hot_rod

Why not an ECM circ?

Paul48

I got 16 ft max head and 16.5 gpm max flow for that circ. It's possible the 005 and 007 may not work. It's also possible the capacity of the original, may not be necessary. I suggest you treat it like a new installation.

donedeal

I went with a taco 007 with ifc. That model of wilo looked to have been discontinued when I was shopping. It's not adequately heating like the old pump was. If I pop that IFC out would I see improvement? Or is there another pump recommendation? My system has built in flow checks already so that ifc is redundant.

hot_rod

Yes removing the internal check will get you a bit more performance.

The Star 16 is a bit higher heat and steeper curve compared to the 007. It depends on what your system requires as to which is the better match. Taco 008 looks like a better match to the Star 16?

Star 16 are still available as far as I know, and the Star 21 is a bit higher head. The 16 or 21 refers to head at the top of the curve.

donedeal

Thanks. Supply house is recommending the Wilo star 21fx 3 speed as a replacement for the 16fx. Based on the graph the 21 its a bit higher head compared to the 16, could that risk any damage To my system? Also there's 3 speeds, just go with the middle speed?

hot_rod

Without analyzing your system to determine exactly what is needed, it is a bit of a guess. A multi speed option would allow you to experiment. Run the lowest setting that will get then job done.

Zman

How many loops at what diameter tubing? Sometimes you can read the footage marks on the supply and return tubing and determine the length of the loops. Is there a mixing valve or other restriction? What type of manifolds?
I would be reluctant to assume that the original installer picked the best circ for the job. Why not just select the best one for your application?
If you post a sketch or picture you will get a more accurate answer.

Paul48

What does the manifold feed? Radiant? Home-run radiator?

Zman

If you assume 4 or 5 250' loops of 1/2". The 21fx on speed 2 looks good. You are running much closer to the sweet spot in the curve than the taco options. Very similar performance to the star 16. Plus you can always turn it up or down a speed.

billtwocase

I switched to Wilo a few years ago with only 1 failure. I can't begin to tell you the failure rate Taco was at when I switched