Hey Paul

Hi, I'm waste, you know... the one you want to vacuum to

All you have to do is remove the carts, open the drain port on the back of the filter and you should be set to go! You might want to attach a hose to the drain port so you don't flood out the filter pad area. If you see the vacuumed stuff re-entering the pool via the returns, you can either close the return line valve (if applicable) or plug the returns while you do the vac-ing.

As always, when wasting the water with the vacuum, keep an eye on the water level in the pool so it doesn't get too low!

This isn't a major issue - no carts in the filter = no debris on them, water flowing out of the drain port (& the returns not just putting the vac'd debris back into the pool) = water being vacuumed to ME (waste)