007 Big Enough?

I think my current Taco 007 is going. I can hear it spinning. Do you think the 007 is the best pump for the job?
I have one pump running a baseboard hot water radiators loop going around my whole house, and I'm wondering if the current Taco 007 pump is ideal. I have a less then 1800 ft ranch. The boiler is in the basement and the pump has to push the water to the upper level. Then all the way around the 25'x70' house. If I have to replace the pump should I look into another 007 or something else?

ShawnTRD wrote:I think my current Taco 007 is going. I can hear it spinning. Do you think the 007 is the best pump for the job?
I have one pump running a baseboard hot water radiators loop going around my whole house, and I'm wondering if the current Taco 007 pump is ideal. I have a less then 1800 ft ranch. The boiler is in the basement and the pump has to push the water to the upper level. Then all the way around the 25'x70' house. If I have to replace the pump should I look into another 007 or something else?

Did it work fine for a number of years? No way to knw what circulator you will require without a bunch of details of your zones (zone lengths, type(s) of pipe, pipe diameters, users, etc...).

A rough rule is 6 ft of pump head for every 100 ft of pipe & fittings at design velocity. If that loop is 200 ft of 3/4" copper, it is probably at the high end of that 007.

My choice for replacement would be a Grundfos 15-58 or a B&G NRF-25. Both should be fine on medium speed.

Rob R. wrote:A rough rule is 6 ft of pump head for every 100 ft of pipe & fittings at design velocity. If that loop is 200 ft of 3/4" copper, it is probably at the high end of that 007.

My choice for replacement would be a Grundfos 15-58 or a B&G NRF-25. Both should be fine on medium speed.

Thanks

I have a Taco 007 circulating 3 zones heating 1250 sq. ft. bi-level. Built the home new in 1990, 26 yrs. ago and only replaced it one time.

Hello Shawn,

I have been using the B+G NRF25 3 speed circulators and they work very well.

I have the same one mounted on my system now that you saw when you came by
and the second one is my spare circulator.

The folks at the local HEPS in Etna, N.Y. next to the NYSEG office building
where I bought these two circulators have them in stock all the time.
the circulators are all the way in the back corner in the plumbing section on
the right side of their store in Etna.

If I remember right they still open at seven AM every day and close at six PM.

I was lucky, when my house circulator failed it was when they were still open on
friday and I had them in by late Saturday night after I drained the boilers down.

Be sure to save your mounting bolts as they did not have the bolt mounting kits I
needed that day for my circulators and I ended up with longer bolts than I needed BUT
I had no heat and I got along with the bolts I bought when I mounted the new circulators
on the old Buderus boiler that weekend; and after I bled the air out of the boilers and the
house loop they worked fine.

I have close to 4 years operating for seasonal heating on this specific B+G NRF circulator now and
it works very well and I have the spare in a five gallon bucket with some plumbing parts

The spare circulator is set aside as insurance and having the new isolation flange mount is a blessing and much easier than dealing with the 25 year old TACO flanges I had-not that they did not do the job they were just threaded in to steel reducing bushings and then the bushings were threaded into thread and sweated copper reducer adapters for the house circulator and the two boiler temperature balancing loop between the two old boilers.

The B+G NRF 25's are three speed units and they are very quiet running circulators.

If you get stuck/the pump dies, call me and I will be glad to loan you my spare if you need help.

ShawnTRD wrote:I think my current Taco 007 is going. I can hear it spinning. Do you think the 007 is the best pump for the job?
I have one pump running a baseboard hot water radiators loop going around my whole house, and I'm wondering if the current Taco 007 pump is ideal. I have a less then 1800 ft ranch. The boiler is in the basement and the pump has to push the water to the upper level. Then all the way around the 25'x70' house. If I have to replace the pump should I look into another 007 or something else?

Your circulator does not push water up hill in a way that creates lift head. The downward fall of the returning water completely cancels out any such lift head. You are only left with friction head. So the only thing that matters is the size of your pipe and the length of your individual runs.

Starting Out wrote:I have a Taco 007 circulating 3 zones heating 1250 sq. ft. bi-level. Built the home new in 1990, 26 yrs. ago and only replaced it one time.

Same here, TACO 007, 3 zones on 2200', 1980 1 pump replaced. Coal boiler and oil boiler have their own pumps though, I like that 100% backup.

lsayre wrote:Your circulator does not push water up hill in a way that creates lift head. The downward fall of the returning water completely cancels out any such lift head. You are only left with friction head. So the only thing that matters is the size of your pipe and the length of your individual runs.

So basically 200 ft of 3/4" brass pipe. Not sure how to calculate that.

2X6=12' of head, at the limits of the pump.

coaledsweat wrote:2X6=12' of head, at the limits of the pump.

Teach me what this means? B&G NRF-25 best choice? Does it bolt into the current 007 flanges?

I also have a B&G NRF-22 on my radiant flooring. Looks to be almost as good as the 25. A little better then 25's speed 2, amost speed 3

For 200 continuous feet of 3/4" on a single zone plus users and fittings, it appears that you do not have enough circulator with the 007. It will only deliver about 3.2 GPM into your system.

A B&G NRF-25 on high looks like it will deliver 4.5 GPM.

4.5 GPM will deliver 45,000 BTUH with a 20 degree Delta-T. And at a still acceptable 25 degrees of Delta-T it will deliver 56,250 BTUH.

If you have about 110 feet or less of HWB's the NRF-25 on high speed should return water at around a 20 Degree Delta-T. You will see about a 25 degree Delta-T at the return leg if you have more like 125 feet of HWB's.

If you have more than about 135 feet of HWB's, even the NRF-25 may not be enough for you. At 150 feet of HWB's your Delta-T will be 30 degrees. You can do this, but the tail end of the line HWB's will perhaps not see sufficient heat.

But then again, you can always deliver yet more BTUH by raising your water temperature if all else fails. Even with a 30 degree Delta-T, 190 degree boiler water will return at a respectable 160 degrees.

lsayre wrote:For 200 continuous feet of 3/4" on a single zone plus users and fittings, it appears that you do not have enough circulator with the 007. It will only deliver about 3.2 GPM into your system.

A B&G NRF-25 on high looks like it will deliver 4.5 GPM.

4.5 GPM will deliver 45,000 BTUH with a 20 degree Delta-T. And at a still acceptable 25 degrees of Delta-T it will deliver 56,250 BTUH.

If you have about 110 feet or less of HWB's the NRF-25 on high speed should return water at around a 20 Degree Delta-T. You will see about a 25 degree Delta-T at the return leg if you have more like 125 feet of HWB's.

If you have more than about 135 feet of HWB's, even the NRF-25 may not be enough for you. At 150 feet of HWB's your Delta-T will be 30 degrees. You can do this, but the tail end of the line HWB's will perhaps not see sufficient heat.

But then again, you can always deliver yet more BTUH by raising your water temperature if all else fails. Even with a 30 degree Delta-T, 190 degree boiler water will return at a respectable 160 degrees.

Haha, 2 weeks ago this would have been like reading Japanese for me!!!! Buy "Classic Hydronics" if you don't know what he's talking about!

Yeah that is a little confusing. I get the idea, but not 100% sure. So should I get something bigger then the NRF-25?