A recycler water pipe or recycler dab rig is a water filter that recycles the water back to the reservoir. As the recycler is used the vapor and water bubble up through the uptake. This water is dumped out in this area of the recycler and then flows back down to the reservoir.
A good recycler will never have splash. A recycler is still a recycler even if there is no vortex action. Although the vortex action looks dope and this is also what consumers are looking for.