Going to swap out my Bestway Filter Pump for a 3000 GPH Intex tomorrow. Considering its a 18 x 48 Coleman / Bestway pool everything as is can be plug and play, including all inlets and outlets. However the Intex Hyrdo Aeration inlet fitting seems so far superior to the existing Bestway in that it can be aimed with the gimble / ball and seems to have better functionality overall. The question is can i change it while the pool is full. In other words, will I be overcome with pressure or risk damage by trying to quickly swap them out. I don't think i could plug it like i would the outlet tubes . These are the instructions that came specifically with the pump in orc er to do the change. I am guessing it would be unscrewing the pool side and then somehow plugging that from the other side. I cannot find anything on the internet or Youtube which leads me to believe its a bad idea or at the minimum i shoudl drain the pool to the inlet level . Any insight thoughts or resources greatly appreciated.