Truma water heaters can be installed by factory trained independent installers. We used A&P Vintage Trailer Works in Paradise, TX about 25 miles northwest of DFW airport to install a Truma AquaGo Comfort modeling both our 2014 31' Classic and and ou 2015 23D International Serenity. The difference is Paul Mayeux is an Airstream only shop and repairs and fixes new and vintage Airstreams. He knows how to install "studs" of aluminum to properly size the opening and uses Airstream aluminum to properly reduce the Dometic opening to fit the Truma.
I suggest giving him a call to learn more about this process from an Airstream specialist. 817-919-3651
We are just happy customers of his. While we spent considerable funds, we believe you get what you pay for. His work has not needed repairs while OEM build issues still can manifest over time.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels