Suburban SW6D (5238A)
#7 in TankFull review
A 6-gallon steel tank heater on propane for a straight swap in an RV with the matching cutout.
Amazon $439.99$439.99
The Suburban SW6D (5238A) is the better RV water heater overall, rated 3.1 to 2.8. The KingRVer 6 Gallon Propane DSI wins on value. The KingRVer 6 Gallon Propane DSI costs $40 less ($399.99 vs $439.99).
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.
KingRVer 6 Gallon Propane DSI
#15 in TankFull review
A 6-gallon steel tank heater on propane for a straight swap in an RV with the matching cutout.
Amazon $399.99$399.99
Which should you buy?
- Choose the KingRVer 6 Gallon Propane DSI for value ($66.67 per gallon of tank ($399.99, 6 gal) vs $73.33 per gallon of tank ($439.99, 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 SW6D (5238A) | KingRVer 6 Gallon Propane DSI |
|---|---|---|
| Overall rating | 3.1/5 | 2.8/5 |
| Value 40% | 40 $73.33 per gallon of tank ($439.99, 6 gal) | 50 $66.67 per gallon of tank ($399.99, 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 | 0 warranty not published, scored as none |
Specifications
| Suburban SW6D (5238A) | KingRVer 6 Gallon Propane DSI | |
|---|---|---|
| Heat and water | ||
| Input capacity | 12,000 BTU | - |
| Tank size | 6 gal | 6 gal |
| Gas recovery | 10.1 gal/h | - |
| Fuel | Propane | Propane |
| Fit | ||
| Weight | 34 lb | 36.2 lb |
| Warranty | ||
| Warranty | 2 years | - |