Suburban SW10D (5242A)
#3 in TankFull review
A 10-gallon steel tank heater on propane for a straight swap in an RV with the matching cutout.
Amazon $591.09$591.09
The Suburban SW10D (5242A) is the better RV water heater overall, rated 3.4 to 3.2. The Suburban SW10D (5242A) leads on value. The Suburban SAW6DE (5321A) wins on hot water output. The Suburban SW10D (5242A) costs $19.48 less ($591.09 vs $610.57).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Suburban SAW6DE (5321A)
#9 in TankFull review
A 6-gallon steel tank heater that runs on propane and electric for a straight swap in an RV with the matching cutout.
Amazon $610.57$610.57
Which should you buy?
- Choose the Suburban SW10D (5242A) for value ($59.11 per gallon of tank ($591.09, 10 gal) vs $101.76 per gallon of tank ($610.57, 6 gal)).
- Choose the Suburban SAW6DE (5321A) for hot water output (14.1 gal/h recovery on gas vs 10.1 gal/h recovery on gas).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every tank RV water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | Suburban SW10D (5242A) | Suburban SAW6DE (5321A) |
|---|---|---|
| Overall rating | 3.4/5 | 3.2/5 |
| Value 40% | 61 $59.11 per gallon of tank ($591.09, 10 gal) | 8 $101.76 per gallon of tank ($610.57, 6 gal) |
| Hot water output 35% | 51 10.1 gal/h recovery on gas | 91 14.1 gal/h recovery on gas |
| Warranty 25% | 50 2-year warranty | 50 2-year warranty |
Specifications
| Suburban SW10D (5242A) | Suburban SAW6DE (5321A) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 12,000 BTU | 10,000 BTU |
| Tank size | 10 gal | 6 gal |
| Gas recovery | 10.1 gal/h | 14.1 gal/h |
| Fuel | Propane | Propane + electric |
| Fit | ||
| Weight | - | 41 lb |
| Warranty | ||
| Warranty | 2 years | 2 years |