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 3m
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 1h 28m
Suburban 232768 Water Heater Aluminum Anode Rod

Suburban 232768 Water Heater Aluminum Anode Rod

PayPal - $20.82 3h
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 - $44.99 3h 12m
New Camco Aluminum Anode Rod Suburban Mor-Flo Hot Water Heater Tank

New Camco Aluminum Anode Rod Suburban Mor-Flo Hot Water Heater Tank

PayPal - $16.82 4h 37m
Suburban Rv Camper Water Heater Wall Switch Assembly - White

Suburban Rv Camper Water Heater Wall Switch Assembly - White

PayPal - $16.95 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 2m
Suburban | 161112 | RV Water Heater Thermostat Gas Control

Suburban | 161112 | RV Water Heater Thermostat Gas Control

PayPal - $231.51 5h 16m
NEW~NOS~Suburban 520773 Reignitor Kit  for SW series water heater

NEW~NOS~Suburban 520773 Reignitor Kit for SW series water heater

PayPal - $43.00 6h
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 2m
Suburban DSI Water Heater Electrode Wire 232456 All SW models

Suburban DSI Water Heater Electrode Wire 232456 All SW models

PayPal - $15.00 6h 40m
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 6h 40m
*SUBURBAN 233257 RV WATER HEATER CONTROL CIRCUIT BOARD *41*

*SUBURBAN 233257 RV WATER HEATER CONTROL CIRCUIT BOARD *41*

PayPal - $84.49 10h 38m
*SUBURBAN 233257 RV WATER HEATER CONTROL CIRCUIT BOARD *42*

*SUBURBAN 233257 RV WATER HEATER CONTROL CIRCUIT BOARD *42*

PayPal - $84.49 10h 42m
RV - Trailer - Suburban Water Heater T-Stat & High Limit Switch - 120 Volt Side

RV - Trailer - Suburban Water Heater T-Stat & High Limit Switch - 120 Volt Side

PayPal - $15.95 13h 6m
Suburban 4&6 Gallon Water Heater Replacement Door for RV   Trailer   Camper

Suburban 4&6 Gallon Water Heater Replacement Door for RV Trailer Camper

PayPal - $44.95 21h 52m
Suburban 4&6 Gallon Water Heater Replacement Door for RV   Camper   Trailer

Suburban 4&6 Gallon Water Heater Replacement Door for RV Camper Trailer

PayPal - $44.95 21h 52m
Camco 42145 6" x 8-1 2" Suburban Atwood Water Heater Flying Insect Screen - 1pk

Camco 42145 6" x 8-1 2" Suburban Atwood Water Heater Flying Insect Screen - 1pk

PayPal - $24.00 1d 28m
Camco 42150 5" Suburban Water Heater Flying Insect Screen - 1pk

Camco 42150 5" Suburban Water Heater Flying Insect Screen - 1pk

PayPal - $18.78 1d 28m
Camco 42151 7" Suburban Water Heater Flying Insect Screen - 1pk

Camco 42151 7" Suburban Water Heater Flying Insect Screen - 1pk

PayPal - $19.85 1d 28m
Suburban water heater models include SW6P,  SW10P, SW6PR, SW10PR, SW6PE, SW10PE, SW6PER, SW10PER, SW6D, SW10D, SW6DE, SW10DE, SW6DEM, SW10DEM