Girard Water Heater Door Installation Kit Replacing Atwood/Dometic 6 Gallon

What is included in the Girard water heater door installation kit?

The kit contains the Girard tankless water heater access door along with the adapter framing and hardware needed to retrofit it into an opening originally cut for an Atwood or Dometic 6 gallon tank-style water heater. This lets you switch to on-demand hot water without cutting a new hole in your sidewall. Confirm your existing cutout dimensions before ordering to make sure the adapter matches your coach.

Will this kit fit my Atwood or Dometic 6 gallon water heater opening?

Yes, the kit is sized specifically for the standard rough opening used by Atwood and Dometic 6 gallon RV water heaters. Measure your current opening (typically around 12-3/4" x 12-3/4" for a 6 gallon unit) and compare to the spec sheet before purchase. If you are replacing a 10 gallon unit instead, see our 10 gallon RV water heater collection for the correct sizing.

Do I need any additional parts to complete the Girard tankless conversion?

Most installs also need fresh propane and water line fittings, sealant for the perimeter flange, and mounting screws rated for your sidewall material. If you are doing the conversion ahead of cold weather, pair it with a RV winterizing kit so the new tankless unit is protected during storage. Our team at United RV Parts is here to help confirm what your specific install needs, text or call 817-984-1852.

How difficult is the installation for a DIY RV owner?

If you are comfortable removing your old water heater, disconnecting LP and water lines, and running a bead of sealant, the conversion is a manageable weekend project. The adapter door bolts to the existing cutout, and the Girard tankless unit mounts to the door assembly. Plan for two people during the lift-and-set step and have butyl tape or Dicor sealant on hand for the flange.