wait how does that work? you stick it into the water pump, hose it down and it comes out the radiator? if that works for flushing all the coolant then that's mighty cool.
Sorry late reply. Yes works a treat. Need to take the thermostat out first and make sure your heater knob is pulled out fully. This back flushes the system and just keep going until it runs clear.
After that I blew back a little on the rad pipe which forces some water back out the thermostat housing just enough to put a litre of blue coolant in.
Thermostat and pipe back on. Job done.
I don't suppose u know what diameter pipe I would need to do that with. I'm guessing I would need to be a pretty flush fit as to not leak. Also when doing this do u need to drain the system before trying to remove the thermostat or do u just pop the top hose off a catch the little bit of over spill. Sorry for the all the Qs