I believe Outfitter now installs only manual holding tank valves on their campers. Bob told me they did that because the electric ones were unreliable. My 20ll with cassette and 7.5CF NovaKool compressor fridge (375W solar and many other options and modifications) has a manual valve for the grey tank (cassette doesn't need one). Please check with Outfitter to confirm. You can also get a new Apex 8.5 with a four 6V battery capacity compartment located under the rear dinette seat. - 460AH. You can't beat an Outfitter for features, customization, capability, storage room, off-road capability, and comfort in a pop-up! They are not cheap, but for what you get are price competitive. Terry
PS. The bed-drawer is a perfect large clothing storage drawer - meets the storage needs for for the two of us for any length trip we undertake and will handle clothes for three when we have someone on the dinette bed.