[C320-list] Head hoses

[Fishbust]

Hi all,

I need to replace the 3/4” hoses for the manual head pump, old and brittle. From the thru-hull valve to pump and vented loop...it is all that clear reinforced hose with red or blue tracer, obviously not for use below the waterline. Even my head sink drain has the same type hose going to a thru-hull valve.  

It all looks original, like the boat was built this way. Anyone know why? Maybe the turning radius doesn’t work out with the proper hose with the tight bends? 

I am planning to replace all of it and a new joker valve, etc., planning on what exactly to buy ahead of time.