Suburban SW6DEL (5240A)
#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 $479.99$479.99
The Suburban SW6DEL (5240A) is the better RV water heater overall, rated 3.0 to 2.9. The Suburban SW6DEL (5240A) leads on value. The Suburban SW6DEL (5240A) costs $42.86 less ($479.99 vs $522.85).
Prices were last checked November 4, 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.
Dometic WH-6GA
#13 in TankFull review
A 6-gallon aluminum tank heater on propane for a straight swap in an RV with the matching cutout.
Amazon $522.85$522.85
Which should you buy?
- Choose the Suburban SW6DEL (5240A) for value ($80 per gallon of tank ($479.99, 6 gal) vs $87.14 per gallon of tank ($522.85, 6 gal)).
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 SW6DEL (5240A) | Dometic WH-6GA |
|---|---|---|
| Overall rating | 3.0/5 | 2.9/5 |
| Value 40% | 31 $80 per gallon of tank ($479.99, 6 gal) | 23 $87.14 per gallon of tank ($522.85, 6 gal) |
| Hot water output 35% | 51 10.1 gal/h recovery on gas | 50 recovery rate not published (neutral score used) |
| Warranty 25% | 50 2-year warranty | 50 2-year warranty |
Specifications
| Suburban SW6DEL (5240A) | Dometic WH-6GA | |
|---|---|---|
| Heat and water | ||
| Input capacity | 12,000 BTU | 10,000 BTU |
| Tank size | 6 gal | 6 gal |
| Gas recovery | 10.1 gal/h | - |
| Fuel | Propane + electric | Propane |
| Fit | ||
| Weight | 36 lb | 15 lb |
| Warranty | ||
| Warranty | 2 years | 2 years |