Resetting audio graph? (Reconnecting after disconnecting audio nodes)

I have code that looks like (pseudocode)

source.connect(lowpass) lowpass.connect(highpass) highpass.connect(destination)

I have a function which I thought should properly reset the audio graph;

source.disconnect() source.connect(destination)

But the graph is not reset, as, when I get to connect new audio nodes to source, there are no FX.

Can anyone help? Thanks in advance

Using the standard AudioContext of the webaudio api