I made my water butt filter like so.....
One of
these Karcher in-line filter units (fits all newer machines) and I adapted it by adding a Hozelock
2289 Adapter on the other end.
and voila.....
Provides a super fine mesh filter that goes in line between the water butt pump and DI Vessel. I also use
this stuff to keep the water cleaner.
Had a tap start leaking on the water butt a couple of weeks back and used the pump to empty it into a kiddies sandpit/paddling pool toy, washed the butt out, changed the tap and pumped the clean water back in again. Well happy with the whole system....
With our mains water being at a TDS of 500+ I don't have an option, or I'll be changing the resin every month or so. I also drain the DIV after every use.....no idea if that makes a difference to the resin's longevity or not?