After soaking hot tub filters there is always some residual cleaner, resulting in foam.  I designed this filter flusher to force water through the filter pleats by running the flusher slowly up and down the filter.  It has a 54mm diameter and is approximately half the length of my filters.  The threads are GHT and work directly on a laundry sink faucet and garden hose.  With an adapter, it can also be used with a washing machine hose.  

It prints without supports.  I used an extra wide brim to add stability.  It is a tall and narrow print, so I reduced print speed at height to reduce any wobble.  It was printed with PLA+ and has been working great so far.