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[WoodMOJoe]

There is a little white plastic piece in the outlet end of my pump.  Is that the check valve and do I want it in there?

[uncle]

I was advised to pull mine out and I've had no negatives to this.

Brian

[WoodMOJoe]

I was advised to pull mine out and I've had no negatives to this.

Brian

Thanks Brian, yeh it looks like it would really restrict the flow, can't imagine what it's purpose would be in my system.

[RSI]

If it is your main boiler pump, pull it out. If you are using one something else like in-floor heat, leave it in.

[WoodMOJoe]

If it is your main boiler pump, pull it out. If you are using one something else like in-floor heat, leave it in.

Yes, it is my main boiler pump, will leave it in, thanks.

[Roger2561]

I'm using mine to circulate water between the oil burner and the flat plate heat exchanger.  I left it in but should I remove it?  Thanks, Roger

[WoodMOJoe]

If it is your main boiler pump, pull it out. If you are using one something else like in-floor heat, leave it in.

Yes, it is my main boiler pump, will leave it in, thanks.

Was a long day yesterday, I meant I will TAKE IT OUT!      

[WoodMOJoe]

When I went to pull the check valve out I just got half of it I think?

Do I need to get the white piece out in the pic below?  If so anybody know any tricks to do that?

[RSI]

It should all come out.
Can you hook it with something like an allen wrench?

[WoodMOJoe]

It should all come out.
Can you hook it with something like an allen wrench?

It's in there real tight but I will figure out something to pull it out, just wanted to make sure it was supposed to.  Thanks RSI.

[willieG]

mine did not come out easlily either...i grabbed it with pliers but it came out in a couple of pieces

[slimjim]

The best tool I've found for that job is the saw blade on my leatherman (wave), it works great, don't cut yourself, it hurts!

[WoodMOJoe]

mine did not come out easlily either...i grabbed it with pliers but it came out in a couple of pieces

Yeh, I think I will have to break it in pieces to get it out, will try again tomorrow.

[Crow]

 I tried to remove mine also and the large diameter white that fits in the cast bore would not come out. Used a to pry the edge back and could see what looks like an O-ring behind it and then it flares out wider still as if it is installed from the inside if the pump.

WARNING - DO NOT use a heat gun in attempt to make it softer to remove. The impeller will not take it!!!
On a related note does anyone know if a rebuild kit is available for a 26-99? This bonehead was determined to get that white part out.

[WoodMOJoe]

I did some Googling and found this (from 2006):

"Grundfos internal check valves are friction fitted in the outlet of the pump and have been successfully applied in the field for over 5 years. The location in the outlet of the pump allows for easy removal, if desired, but the low pressure drop design of the product makes it optional - pump performance with and without the valves are nearly identical."

Don't know if that is true or not but I am now thinking I may just leave the white part that is still in the pump.