The fill/drain hose coupling will not stay attached under pressure. I have ensured that the faucet aerator is correct and allows for enough room for the coupling quick-disconnect.

The white gasket? inside the coupling came out, but I was able to reinsert it. It does look as if a piece is missing though.

So, my question is: can I replace just the coupling or do I have to replace the whole hose assembly?

If I must replace the hose assembly, where can I find instructions for accessing the hose hookups on the dishwasher?

Also, are there any cheaper options that I have not considered?

Thank you,
CBernard