I just want to chime in here! HappyPill if you are still around.
You can ABSOLUTELY water pump with the ThickWall, if you would have looked around their site a bit you would have seen they sell a water catch attachment so you can water pump without getting water into the pump.
I will also argue that water pumping is not a “marketing” ploy designed by Bathmate, as several established pump brands sell attachments and recognize water pumping, not to forget the numerous threads on thunders and elsewhere of water pumping being used sin-bathmate.
Water pumping does have its benefits, and there are more than enough threads out there that get into why. For me is the ease of applying constant even heat through my session, and anecdotally ive noticed a reduced amount of edema when doing similar sessions (hg/time).
Its not a holy grail of course, and pumping without water is still great but I just wanted to dismiss a couple pieces of misinformation in this thread. So HappyPill if your still around, and genuinely want to give water pumping a shot to try it out you can 100% get a water catch for your ThickWall for about 200 SEK.
Edit: I missed the one post HappyPill said he ordered the water trap. Whoops, Im going to leave the post however, for new eyes that might come across this thread as well
"Pain is temporary, pride is forever."