Oh the fun of keeping things warm ...
Cracked a filter housing by neglecting to drain it and had lots of lovely water gushing over the patio in the early hours as the thaw set in ...
1. Van immersion on. Check.
2. Fan heater between my two storage tanks where my transfer pump sits. Check.
3. R/O in insulated cupboard under car port by house. Check.
4. Pre-filter cartridge and housing sitting outside of R/O cupboard.
OOPS!