Gro Supplies recommends the Autopot 16mm Click Fit Tank Adaptor and Filter. This device connects to any 16mm Flexitank. It allows water to flow out of a tube. Particles are stopped from entering the system thats to the filter. This is very useful if you have branches of pipe which is 6mm. The pipes can easily get blocked causes problem from debris. To clean the filter it is very simple, you take it apart and clean it and then re-attach them back together. The 16mm Click-Fit Tank Adapter is the perfect way to get water flowing from your Flexitank!