Hi guys.
I bought the PRO DESIGN SUPER COOLER and now I need to install it on my GG EC300 2018.
https://www.prodesignracing.com/super_coolers.htm
I'm not sure which hose he goes in!
The explanatory leaflet reads as follows:
"SUPER COOLER must be installed in upper hot water line." Then cut water line 3-6 inches from return water spigot from head "Note: very important make sure you install in hot water return line."
Can anyone tell me with absolute certainty what this hose is?
Appreciate.
I bought the PRO DESIGN SUPER COOLER and now I need to install it on my GG EC300 2018.
https://www.prodesignracing.com/super_coolers.htm
I'm not sure which hose he goes in!
The explanatory leaflet reads as follows:
"SUPER COOLER must be installed in upper hot water line." Then cut water line 3-6 inches from return water spigot from head "Note: very important make sure you install in hot water return line."
Can anyone tell me with absolute certainty what this hose is?

Appreciate.