"phaeton" wrote in message

1) put a trap in the PVC (it has none) and buy some beer
2) put some sort of one-way check valve in the PVC and buy some beer
3) duct tape or otherwise seal the hose into the PVC and buy some beer
4) buy some votive candles and beer.

5) buy some beer and to hell with the other options.

First choice is #5, but I think #1 may be the best long term solution.