Suburban Water Heaters Suburban Water Heaters Pilot Flush Mount Door Models: Radius cornered flush door extends only 3/16" from trim exterior for smooth sidewall appearance. Standard on all 10 gallon models. Direct Spark Ignition Models: Remote switch electronically controls water heater. Gas/Electric Combination Models: Takes advantage of available campsite or generator produced electricity. Combined gas/electric 16.4 gph recovery rate. Standard Features for All Models: High tensile steel, porcelain lined tank for long life. Replaceable anode rod provides further corrosion protection. Highest recovery rate in the industry. Convenient exterior gas line connection. Regulated 100% safety thermostat provides positive control. One piece, die formed metal control housing protects controls from the weather.