Hi. Instead of passing the washing machine cold water pipe and the drain pipe through a hole or holes in the kitchen unit partition wall, to affix to points under the sink unit. I'd like to use two feed-through (or bulkhead) units. That would mean if I install or uninstall the washer I would not be messing about under the sink, but making connections on the kitchen unit partition to the left of the washer. Do these feed-through or bulkhead units exist for washer inlet and drain pipes? Thanks.