Saving old circs for spares not possible since they dry out?

Terry H

David, when we get a pump that has been used we'll put on a set of plugged flanges and fill them with glycol to keep them from drying out.

Terry H.

D107

I recently salvaged two working circs from new boiler install

and put them aside hoping to be able to use them someday in a pinch.(Taco 008, Grundfos UPS 20-42, both at least 15 yrs old.) But was told they'll dry out and be useless. True?

Thanks,

David

Unknown

New one on me Dave.......

put them to one side in your shop, they don`t ask for bread & water, you may be glad you did some Saturday night!

brucewo1b

I had some older grundfoss

that were used in greenhouses that would get taken out in the fall and put back in the spring and sat all winter in a shop, if one was froze we just gave it a few spins my hand and would go the whole season, work that way for years.

D107

Thanks gentleman, good to know. The Grundfos has a center screw

that I understand can be loosened (for access to the impeller so it can be spun in case it seizes?) Special procedure for this?

Strangely enough my own old Grundfos seized in October. I cut power, tapped it with a hammer a few times, and she went right back to work.

Thanks,

David

Ken_40

Some of the really old

Grundfos' had a relatively "weak" start torque, making them prone to off season seizure.

To the best of my knowledge, they over came that shortcoming almost 20 years ago...

Keep 'em both. One never knows what might be needed some cold wintry night.

Dave Stroman

Those cartridge pumps always have water in them. I made the mistake of leaving a used one in my truck. The water froze and ruined the pump.

Dave in Denver

Kniggit

00 circs

its not just drying out, if they are iron pumps the bearings in the cartridge may rust, I have had a couple do that, I removed the cart pulled off the impeller, gripped the shaft and got it spinning smoothly again. no problems after that

K