Outdoor Wood Furnace Info

All-Purpose OWF Discussions => Plumbing => Topic started by: MD20/20 on September 05, 2021, 12:52:34 PM

Title: grundfos 26-99F vs. 26-99FC
Post by: MD20/20 on September 05, 2021, 12:52:34 PM

whats the difference between the Grundfos 26-99 F and 26-99 FC?

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: mlappin on September 06, 2021, 05:20:56 PM

An F is a single speed while an FC is a three speed

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: RSI on September 06, 2021, 10:12:48 PM

The FC has a check valve in it and just the F does not. I think the F means it is a flanged model.
The single speed pumps have UP before the number and 3 speed pumps have UPS.

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: mlappin on September 07, 2021, 08:50:50 AM

Quote from: RSI on September 06, 2021, 10:12:48 PM

The FC has a check valve in it and just the F does not. I think the F means it is a flanged model.
The single speed pumps have UP before the number and 3 speed pumps have UPS.

Is that it? They could leave that check valve out but include it in the box. Ive literally removed the check valve in 99.9% of my installs.

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: MD20/20 on September 07, 2021, 09:12:46 AM

I thought the FC is for open systems and F for closed. I guess that's not the case and its fine to use on my OWB.
Thanks guys.

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: MD20/20 on September 07, 2021, 09:18:10 AM

also, the one i got is black...seller said it was ''commercial'' version.

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: MD20/20 on September 09, 2021, 07:36:40 AM

I checked with Grundfos and was told it is an OEM pump, so that's why its black. Thanks for your help.
I have to put the pump on and then start cutting...not one peice of wood ready for the winter!

Title: Re: grundfos 26-99F vs. 26-99FC
Post by: hoardac on September 09, 2021, 07:35:42 PM

You need to get started cutting 20/20