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[JOWEN]

How long should i expect my taco circulator pump to last in my Hardy H5 it runs all the time. Im running a heat exchanger in my duct as well as domestic hot water heat exchanger that also has a taco pump on the domestic hot water out side of the heat exchanger.

[Sloppy_Snood]

...should last until 1 day after the warranty expires from my experiences. 

...but with proper maintenance, guys running Tacos seem to be routinely getting 5-10 years,,, some even more.

[LittleJohn]

If you run the pump all the time, it will probably last longer, because it does not have to start and stop, so less chances to seize up or get stuck.

...it also will fail on the coldest night, during a snow storm, on a holiday weekend  , cause it can.  Expect Murphy's Law, so if possible have a backup pump -> does not necesarily have to be a 100% match for your application, but it shouls be enough pump to get you by for a few days, til the weather lets up and you can replace the pump with the permanant replacement

[JOWEN]

If you run the pump all the time, it will probably last longer, because it does not have to start and stop, so less chances to seize up or get stuck.

...it also will fail on the coldest night, during a snow storm, on a holiday weekend  , cause it can.  Expect Murphy's Law, so if possible have a backup pump -> does not necesarily have to be a 100% match for your application, but it shouls be enough pump to get you by for a few days, til the weather lets up and you can replace the pump with the permanant replacement

I agree 110% Littlejohn Thirty years on a farm and seven years working for the power company I have learned this lesson on many holidays and cold late nights. Just this last saturday we had a freak snow storm here in SC and thats never happened before worked all day getting the lights back on. Murphy is always enforcing his law.

[oaky]

My Taco 007 F5, lasted for all the 14 years I had my old Aqua-Therm owb, it was still running perfectly when I sold the owb this past spring. It ran 24/7 during the heating season, shut it off until the next heating season. Now, after being on this forum for awhile, I learned it is advisable to start your circulator pump for a few minutes couple times a month during the off season.

[JOWEN]

Thats a good idea oaky i will have to make a note of that for the summer. I might keep her going in the summer anyway for the hot water.

[LittleJohn]

... Now, after being on this forum for awhile, I learned it is advisable to start your circulator pump for a few minutes couple times a month during the off season.

Totally agreed, its called excerizing the pump, it can help you find a faulty/questionable pump before heating season actually begins