I have used one of these kits attached to my Grainfather Conical to circulate cold water from an insulated picnic box since March 2021. I do not use it all the time but I use it during the warmer months for Ales to avoid overheating and whenever I brew lager (mostly through winter), it works...
I have finally found plastic crates that are a good fit for these bottles:
20 x 500ml ECO Bottle Crate APF13 from
www.solentplastics.co.uk
Dimensions (External):
L 400 x W 300 x H 300mm
Dimensions (Internal):
Partition L 68 x W 68 x H 270mm
Note the partition dimension is exactly 68mm...
