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.
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 1h 16m
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 1h 40m
Suburban Water Heater SW6DE 6 Gallon with Control Board

Suburban Water Heater SW6DE 6 Gallon with Control Board

PayPal - $275.00 2h 56m
SUBURBAN SW10D DIRECT SPARK WATER HEATER 10 GALLON

SUBURBAN SW10D DIRECT SPARK WATER HEATER 10 GALLON

PayPal - $429.99 3h 7m
6259AEB SW model 10,  12,  16 Gal Flush Mount -BLACK-Suburban Water Heater Door

6259AEB SW model 10, 12, 16 Gal Flush Mount -BLACK-Suburban Water Heater Door

PayPal - $56.99 3h 24m
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 3h 53m
5286A Suburban Nautilus Tankless On-Demand RV Water Heater

5286A Suburban Nautilus Tankless On-Demand RV Water Heater

PayPal - $577.00 3h 55m
Suburban SW6D SW6DE SW10D SW10DE Water Heater Circuit PC Module Board 520814

Suburban SW6D SW6DE SW10D SW10DE Water Heater Circuit PC Module Board 520814

PayPal - $80.39 3h 59m
Suburban 232259 RV Camper Water Heater Switch Rocker

Suburban 232259 RV Camper Water Heater Switch Rocker

PayPal - $6.98 4h 46m
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 5h 14m
Suburban | 161112 | RV Water Heater Thermostat Gas Control

Suburban | 161112 | RV Water Heater Thermostat Gas Control

PayPal - $231.51 5h 28m
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 - $44.89 6h 14m
Suburban DSI Water Heater Electrode Wire 232456 All SW models

Suburban DSI Water Heater Electrode Wire 232456 All SW models

PayPal - $15.00 6h 52m
Suburban 232767 Water Heater Anode Rod

Suburban 232767 Water Heater Anode Rod

PayPal - $16.24 6h 59m
Suburban 232768 Water Heater Aluminum Anode Rod

Suburban 232768 Water Heater Aluminum Anode Rod

PayPal - $16.45 6h 59m
Suburban 5138A Recreational Vehicle Water Heater for RVs

Suburban 5138A Recreational Vehicle Water Heater for RVs

PayPal 17 $60.01 7h 56m
Aluminum RV Water Heater Anode Rod Replacement Suburban Camper Hot Trailer Camco

Aluminum RV Water Heater Anode Rod Replacement Suburban Camper Hot Trailer Camco

PayPal - $12.99 11h 13m
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 - $11.74 11h 37m
Suburban 6255APW Polar White Water Heater

Suburban 6255APW Polar White Water Heater

PayPal - $46.22 12h 46m
Suburban 6259APW Polar White Water Heater

Suburban 6259APW Polar White Water Heater

PayPal - $59.46 20h 8m
Suburban water heater models include SW6P,  SW10P, SW6PR, SW10PR, SW6PE, SW10PE, SW6PER, SW10PER, SW6D, SW10D, SW6DE, SW10DE, SW6DEM, SW10DEM