Kayteg1 wrote:
I found those 1400W elements, but even they don't list the thread size, info says they have 1 1/2" hex, so the thread next to it has to big as well.
Not likely will fit into 3/4" hole I have on my Atwood.
You are getting confused.
OEM..that is an electric heat element that is part of a WH that has an electric heat element Option. WH Tank is designed with proper size opening to accept the OEM FACTORY heat element.
Unless you change WH tank to one with that Option you can NOT install it after market.
That is why the aftermarket heat rods go in thru the drain hole and why those heat rods are low wattage......because rod is small.
You mention 3/4" hole on your Atwood. :H
Atwood drain hole is 1/2" and tank is aluminum.
Suburban drain hole is 3/4" and is a steel tank---which is glass-lined. And being STEEL it requires an anode rod to protect steel tank from corrosion.
So if you have a 3/4" drain hole then you have a Suburban WH and that heat rod is installed when anode rod should be.....so hopefully you got the KIT with the anode rod attachment. Even though the anode rod is very small at least it is something which is better then NO anode rod. Course being small it will dissolve very quickly and have to be replaced frequently or steel tank will not be protected.
Better to burn the propane ......faster recovery