How to build biogas scrubbers at home

Getting my biogas scrubbers working is one of the last tasks in my new setup. I have always wanted to have the scrubbers and gas storage in the strawbale shed but until now it wasn't possible. With space now available I took the chance to upgrade the biogas scrubbers one more time, hopefully it will be the last. I really like these as they are easy to change, you can see in side them and they are relatively simple to install. Scrubber 1: Water Scrubber 2: Cat litter (any desiccant) Scrubber 3: Iron wool Materials list 2 x 3/4" Male BSP connectors 2 x 3/4" Male BSP to 25mm PVC adaptors 5 x 3/4" Female BSP to 25mm PVC adaptors 1 x 25mm PVC elbow 30cm 25mm PVC pipe 3 x 3/4" Brass male BSP to 8mm pipe 3 x 8mm to 4mm brass pipe reducer 2 x 3/4" Brass male BSP to 1/4" BSP 2 x 8mm barb to 1/4" BSP female thread brass coupler 1 x 8mm inline gas valve 3 x 10" Aquafilter inline water filter housing transparent 3/4" Chapters 0:00 Intro 1:32 Moving the gas line 2:50 Scrubber materials 4:52 Putting scrubbers together 7:22 Inlets and outlets 8:30 Wall mounts 9:03 Mounting to the wall 9:45 Linking it all up 11:04 Filling the scrubbers 11:25 Moving in the gas bag 11:41 Opening the valves