did u c the demo in my showroom? that pump is 1.5hp pump and my PVC pipe + flexible hose didnt crack or burst. Pipes can withstand minimum 5 times the pressure for grundfos pumps. THe only problem is, did ur plumber connect the pipes properly? If u got a good plumber, then do not worry about leaks or cracks.

Just recall that u gonna go for hitachi pump, thatz really 50% Grundfos price. Choosing a pump is like choosing ur toilet bowls, why u didnt go for Cheap brandless China toilet bowl which cost 50% cheaper than those Johnson Suisse toilet bowls that you bought from me? You r gonna stay in the house for many years and not 1 or 2 weeks, so ofcoz u wan to get something better and wouldn't give u headaches.