Thank you all. I guess Grundfos it is!
Speedbump -- I haven't tried running the return pipe to the bottom - will have to ask the plumber if he could do it. I am not handy enough to figure it out myself :-(
Any thoughts on my other question - does the check valve need to be replaced?
Thanks!
I have an 'Armstrong Astro Express' hot water circulation pump, which has stopped working after 3 1/2 years of service - so I am looking for a replcement.
I came across a variety of brands online; so am looking for recommendations.
Does any of the following outshine the rest?
1...
