Interesting...that waterbed fill kit sink adapter looks exactly like the one I have had for many years. Only mine is green and distributed by Python. I remember the old days before pythons working at a LFS and using homemade hose adapters made out of PVC. I should try to make one up for old times sake! The only part I have had to replace on the old python that has to be at least 10 years old by now and has had thousands of gallons go through it is the threaded piece that hooks it up to the sink with hose threads.