PN for the T's is 87248-80830, description is PIPE, WATER. ~ $9.00 each from my dealer that typically doesn't discount.
Likelihood of a leak may go up, silicone grease on the T and hose may mitigate that due to ease of assembly. Oem hose spring clips are definitely reusable.
Not sure if the reducer is removable as I have yet to change mine.
hth
Steve
Good to hear from you Steve, I've missed you in the 100s section.
I think you may have a typo in PN#, OP has as 87248-08030 for the sub PN# (water pipe), which my local Toyota Parts Dep has at $12.13 retail list. I did have those and the OEM assembly 87209-60C01 $67.43, 87209-60C12 $75.77 retail list plus tax and driving time to pick up $$$. Which all are cheaper online at a number of location.
I find soapy (Dove) dish water is great for assembly of water pipes when need, which I didn't in this case.
Using the substitute tees would've probably been ok. But this was not my rig, so I can't keep and eye on for leaks. Once I found OD different, a red flag went up. I'm regretting not pulling new OEM hose assembly apart and measure OD one of those tee's, but not mine to play with.
Why Toyota only sell assembly, who knows.
We run into stuff like ball joint, rack mounting bushing, 03+ starter contacts & plugger, etc. in the 100 series we can't get individual parts to rebuild. In those, Toyota considers to difficult or to time consume to just replace a part, rather than the whole assembly. Which in this case I can't see either to be the case
