Plumbing in circulating pump

[sstan]

I could use some advice .. the ports on my OWB are 1 1/2 inches .. the flanges on my circulating pump are 1 1/4 inch and and my Pex lines are 1" .... keeping in mind that smaller size fittings are cheaper and easier to find (I can't even find a 1 1/4 ball valve) .. is ok to reduce to the 1 inch size BEFORE the pump?

can I reduce to the one inch size right at the ports on the stove and get adapters for the pump flanges or do I have to feed the pump with 1 1/4 inch then reduce to the 1 inch size into the pex lines?

thanks,
steve

 

[mga]

why not?

at some point you'll have to reduce it. might as well do it, if possible, at the pump.

i'm sure the opinions will vary as to where it should be reduced.