Found the episode of anyone wants to check it out
Season 6 Episode 6. Tanked for the Holidays
It's beginning to look a lot like the Christmas around ATM when Wayde and Brett are asked to create their largest holiday themed cylinder tank ever! The good tidings keep rolling in when a Snowglobe tank is requested for a winter celebration.
TV-PG CC Runtime: 41 minutes Release date: December 20, 2013