After you flip on the water pump switch open each and every faucet, shower head or wash down fixture. I suggest doing them one at a time, first cold then hot at each faucet. Do this to be sure all the lines are getting pure pink the same exact color it was coming out of the bottle.
Remember this type of RV antifreeze is not intended to be diluted. Diluted antifreeze means warmer burst & freeze points. If in doubt, you can always suck one more bottle through.