Suburban RV water heaters use a porcelain-lined, steel water tank that has an anode rod to offset electrolytical effects. According to Suburban this may double, or triple the hot water heater life. Also Suburban gas waters feature 12,000 BTUH for a rapid recovery rate, and combo gas/electric water heaters utilize a 1,440-watt heating element to recover an extra 6 gallons of hot water per hour.
 
For additional insulation, Suburban uses a copolymer insulation jacket which the company claims will retain heat better than the cardboard insulation used on competing RV hot water heaters.
520814 Suburban MFG Ignition Control Circuit Board for Suburban Water Heater

520814 Suburban MFG Ignition Control Circuit Board for Suburban Water Heater

PayPal - $83.59 1h 7m
Suburban 6259ACW Colonial White Water Heater Access Door

Suburban 6259ACW Colonial White Water Heater Access Door

PayPal - $56.31 1h 55m
Brand New Suburban Water Heater Magnesium Anode Rod For RV Travel Heater -abb

Brand New Suburban Water Heater Magnesium Anode Rod For RV Travel Heater -abb

PayPal - $11.89 3h 35m
RV NEW!!! Suburban Water Heater On Off Switch Black Trailer RV Motorhome

RV NEW!!! Suburban Water Heater On Off Switch Black Trailer RV Motorhome

PayPal - $49.95 6h 6m
Suburban 6255APW   6 Gal. SW Water Heater Access Door Flush Mount Polar White

Suburban 6255APW 6 Gal. SW Water Heater Access Door Flush Mount Polar White

PayPal - $46.99 8h 26m
Electric Conversion Kit LIGHTNING ROD Water Heater 10 gallon Suburban Atwood New

Electric Conversion Kit LIGHTNING ROD Water Heater 10 gallon Suburban Atwood New

PayPal - $84.99 8h 51m
Electric Conversion Kit LIGHTNING ROD Water Heater 6 gallon Suburban Atwood

Electric Conversion Kit LIGHTNING ROD Water Heater 6 gallon Suburban Atwood

PayPal - $79.99 8h 51m
Suburban 6255APW Polar White Water Heater

Suburban 6255APW Polar White Water Heater

PayPal - $48.51 9h 7m
Suburban Water Heater SW6DE 6 Gallon with Control Board

Suburban Water Heater SW6DE 6 Gallon with Control Board

PayPal - $275.00 10h 7m
Suburban 232768 Water Heater Aluminum Anode Rod

Suburban 232768 Water Heater Aluminum Anode Rod

PayPal - $18.32 10h 23m
Suburban Water Heater 232282 Thermostat Limit Switch 130 Degree RV 12v DC

Suburban Water Heater 232282 Thermostat Limit Switch 130 Degree RV 12v DC

PayPal - $20.49 11h 3m
Brand New Suburban RV Water Heater Standard Door,  10 Gallon,  B Style,  White

Brand New Suburban RV Water Heater Standard Door, 10 Gallon, B Style, White

PayPal - $51.25 12h 25m
Suburban | 161112 | RV Water Heater Thermostat Gas Control

Suburban | 161112 | RV Water Heater Thermostat Gas Control

PayPal - $231.51 12h 38m
SUBURBAN Water Heater DOOR - White Radius A-Style 4 & 6 Gallon Standard Mount

SUBURBAN Water Heater DOOR - White Radius A-Style 4 & 6 Gallon Standard Mount

PayPal - $42.65 13h 24m
Suburban DSI Water Heater Electrode Wire 232456 All SW models

Suburban DSI Water Heater Electrode Wire 232456 All SW models

PayPal - $15.00 14h 3m
Quick Products QP-MAR9 Magnesium Anode Rod for Suburban and Mor-Flo Water Heater

Quick Products QP-MAR9 Magnesium Anode Rod for Suburban and Mor-Flo Water Heater

PayPal - $11.86 14h 3m
Water Heater Magnesium Anode Rod 9 1 4'' Replaces for Suburban 232767 RV-Camper

Water Heater Magnesium Anode Rod 9 1 4'' Replaces for Suburban 232767 RV-Camper

PayPal - $11.47 18h 47m
Suburban 232882 Water Heater Wall Switch Assembly - White

Suburban 232882 Water Heater Wall Switch Assembly - White

PayPal - $28.81 18h 58m
Suburban 6255APW Polar White Water Heater

Suburban 6255APW Polar White Water Heater

PayPal - $46.78 19h 56m
5247A Suburban Mfg Direct Spark Ignition Electric 12GAL Water Heater W  12000BTU

5247A Suburban Mfg Direct Spark Ignition Electric 12GAL Water Heater W 12000BTU

PayPal - $637.94 20h 55m
Suburban water heater models include SW6P,  SW10P, SW6PR, SW10PR, SW6PE, SW10PE, SW6PER, SW10PER, SW6D, SW10D, SW6DE, SW10DE, SW6DEM, SW10DEM