The washer was an option. If you already have the jets, you have already solved the trickiest part (check to see if the little "T" is attached to some tubing underneath). If you want to have genuine a Volvo washer, it will be an expensive proposition, but the parts are available. But you can buy a universal washer from your local parts store for $10-20. Any washer will do (you may have to adapt the tubing to fit your jets). What I did, was buy a used washer from Ebay. There are hundreds for sale on ebay, but they are all from different cars. I didn't care if mine was Volvo or not. I ended up with a Suburu washer that I paid $1 for plus $5 for shipping. I picked this model because the tank was the right shape for the place I wanted to hang it.