Intex pool hose splitter

I have an Intex Easy Set pool and I want to heat it.
How? Using my bbq: I made a heat-exchanger from a copper pipe to put on the bbq and I will run the water from the pump through this heat-exchanger and back in the pool.
This splitter is needed after the pump to divert a part of the water through your garden hose to the bbq.

This is a piece which will fit after the pump: on exit will connect the normal hose, the other can be used to connect a 16mm (exterior) garden hose.

To optimize