folks, since i leave in the tropics, i'm thinking of using a T-joint to direct the coolant flow to the heater core back to the engine.

i'm talking about intercepting the coolant hoses going after they come out from the aux water pump (1 hose for driver side, 1 hose for passenger side and 1 return hose to engine).

my questions (to anyone who has had the experience here) are:

1. what is the diameter of the T-joint required (2cm?) ?

2. what is the best material for the T-joint (steel, stainless steel, brass or PVC plastic)?

i hope i'm clear in my post