I have and have had exactly the same problem since i have had my system,i spoke to wyvale and they made me different O rings and it made no difference what so ever.They made me some filters to put just inside the tank and this also didn`t do the job,some tanks that are made have dodgy threads and that`s the problem,i now don`t fill mine right up otherwise the van gets soaked in the footwells that`s how much water comes out.