I have an L5 water heater it works fine, its set up after the pump. Only works on the one reel though. I wanted it to be able to service the two reels. If i was to fit the heater inbetween the tank outlet and the T piece when it then goes to the pumps, should it run fine with water being sucked through? Obviously assuming its not to hot going through the pumps. Just wondered if anyone has tried it like this?