Nickhydro & Robertgf:
Thanks for the replies!
I bit the bullet – borrowed my friends pick-up truck again – and got the regular PVC from Home Depot. The extra time and money would seem insignificant compared to the possibility of having to rip out the cellelar core stuff and redo it!
One follow-up question: What’s the best way to reduce the noise of the water rushing through the PVC in the walls? Do I just add regular (uncompressed) fiberglass batting to the stud bay or is there a special pipe wrap material?like