Need help with what pump to replace a B&G LR20BF with


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Old 10-07-09, 05:31 PM
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Need help with what pump to replace a B&G LR20BF with

I have been trying to figure out what pump to use to replace the Bell & Gossett LR20BF. It is leaking and I was looking for a Taco 007-F5-5 but can not find anyone that has one. The other pump I was looking at is the Grundfos UPS15-58FC but not sure if I need that one or the UPS15-58FRC with the rotated flange, my guess would be UPS15-58FC.

Would this pump work or do I a need a different one?

Would it be a direct replacement for the B&G LR20BF?

Pictures of pump and boiler can be viewed at boiler
 

Last edited by swalz; 10-07-09 at 06:03 PM.
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Old 10-08-09, 12:56 PM
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Taco 007-F5 pumps are very common and should be readily available. For example: https://www.pexsupply.com/Taco-22000-b

You can get flange-to-flange dimensions and connection sizes from Taco's (or any other manufacturer's) website to make sure it would fit.

Was your existing pump working OK except for the leak? If so, you should aim to try to match the replacement pump's head-flow performance curve. The B&G LR-20BF (now obsolete) was a low-head pump; here is its curve: http://www.bellgossett.com/ProductPa...pump-curve.jpg

Here is the curve for the Taco 007F:
http://s3.pexsupply.com/manuals/1249...80/101-029.pdf

They look close enough to me, provided you don't have more than two storeys in your house. But you'd have to check physical dimensions.

B&G is recommending their Series 100 pumps as a replacement for the LR-20BF
 

Last edited by Mike Speed 30; 10-08-09 at 01:30 PM.
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Old 10-08-09, 01:37 PM
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Originally Posted by Mike Speed 30 View Post
Taco 007-F5 pumps are very common and should be readily available. For example: https://www.pexsupply.com/Taco-22000-b

You can get flange-to-flange dimensions and connection sizes from Taco's (or any other manufacturer's) website to make sure it would fit.

Was your existing pump working OK before it started leaking? If so, you should aim for a replacement pump that has a head-flow performance curve similar to your existing B&G pump. Your LR-20BF is a low-head pump, and the Taco 007 might not be a good match. B&G is recommending their Series 100 pumps as a replacement for the LR-20BF (which is now obsolete).

Yes a lot of places have the Taco 007-F5 but I need the one that has the rotated flange which is hard to find. I think I will be going with the UPS15-58FC seems to be the same specs. Found the specs on it and all the other Grundfos UPS series.
Pexsupply has it for $72.95 and when asking about the Taco they did not have it. The 100 series is to much money, right now on a very tight budget, that is why I am doing it myself.

Thanks for the help.
 

Last edited by swalz; 10-08-09 at 03:29 PM.
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Old 10-08-09, 05:21 PM
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I did find a cross reference for my pump and it had the Grundfos UP15-42F listed and the UPS15-58FC. the UP15-42F matches the curve better so I am leaning towards that one.

Dose any one know if I will need to replace the flanges or will the ones used with the Bell & Gossett match up?
 
 

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