I just got error code P1151 code which indicates an issue with the Coolant Heat Storage (CHS) system. I actually bought a replacement tank well over 5 years ago when a dump truck decided to take a short cut turn over the front of my Prius. Amazingly, even though the original tank was deformed, it did not leak and I didn't replace it. I'm not sure if the error code is due to the CHS pump, tank, or sensor.. but I might just replace them all since I already have all the parts. Can someone help me ID the part# for the hose that connects to the bottom of the CHS tank (directly opposite the drain plug). I've circled the connection location in the attached photo. The other photo shows the bottom of my currently installed tank where one can see some damage to that hose - note that the hose is not leaking so it might be ok to just reuse.
For issues like this, go to amayama.com. Look up the appropriate Prius (NHW20L-AHEEBA USA, all gen 2 years, there appear to be two different parts list for the early ones and the later ones), then "Radiator and water outlet" (link is from the link for more recent years): https://www.amayama.com/en/genuine-catalogs/epc/toyota-usa/prius/NHW20L/8936/engine/1603 hover mouse over the part number in the diagram and it jumps to the relevant part(s).
Just figure out the shape of the one on your car and compare it to the diagram. If a hose has one or more bends in it and sections of different lengths, and the hose on the vehicle looks the same as the one in the diagram, they should actually be the same. Where I get into trouble is when a hose is just a straight piece, then there's nothing to use for scale, and one section of straight hose looks more or less like another in a diagram. You can't even go by length, usually, because the viewing angle can make the hose look much shorter than it is in reality.