After draining the water from my Swift Challenger 530SE for the winter will I now need to top up the heater system before using again, if so anyone know where the filler hole is (manual has been lost) ?
That's good to know Roger, I'm surprised it has to be done before towing but it does make sense to help keep the weight down.It will fill automatically when you connect the aquaroll pump and open a hot tap - the pump will push the air out and replace it with water.
It should be drained each time, before towing, surprised you haven't sorted this before.