Grey water tank bypass, caravan modification. 

We modify the plumbing under the van to add a bypass valve to the grey water tank. So that when we don't need to store grey water it can run directly out without going through the grey water tank.
We have found that the tank develops a sludge and starts to smell and needs flushing through with a cleaner regularly.
Parts list -
Jandy Valve 40mm
1m x 40mm PVC Pipe
x2 40x32mm reducing couplings
40x25mm reducing coupling
25mm threaded valve socket
PVC cement
Light hanging saddle clip
Cable ties
It cost about $100 and took about an hour - not including the extra trip to Bunnings.
Disclaimer!
This is not a “how-to” video this is a how we did it!
The plumbing on caravans will differ with make and model so this may not work on your van!