Changes

* [http://funkfactorybrewing.blogspot.com/2016/09/modifying-barrel.html Funk Factory Brewing modified barrel for aging beer on fruit.] Associated [https://www.facebook.com/groups/MilkTheFunk/permalink/1417425021619041/ MTF thread here].

* [https://www.glaciertanks.com/brl-mw-rnd-g12x4-sil.html Glacier Tanks custom manways for barrels and puncheons.] See also [https://www.glaciertanks.com/barrel-conversions.html Glacier Tanks LLC sells a manway fitting for barrels.] <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1991131250915079/ Matthew Fields. Milk The Funk Facebook group post on wine barrel triclamp taps & manways from Glacier tanks. 02/16/2018.]</ref>

* Vertically stored barrels can have their bung sealed by using a silicon bung, rubber bung, or wooden bung <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2642877995740398/ Milk The Funk Facebook group thread on how to seal the bung in a barrel. 05/02/2019.]</ref>.

*[https://www.facebook.com/groups/592560317438853?view=permalink&id=2674107619284102 Homebrewer Samuel Neitzke's modification of small barrels for a CO2 post and a sample port for easy transfers and CO2 purging.]