A 6-gallon steel tank heater that runs on propane and electric for a straight swap in an RV with the matching cutout.
Amazon $592.99The Suburban SAW6DEL (5322A) rates 3.2 among tank RV water heaters; the Fogatti InstaShower 9 Pro (FS10B1S) rates 3.0 among tankless ones. The Suburban SAW6DEL (5322A) costs $47 less ($592.99 vs $639.99).
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.

A tankless heater rated 66,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $639.99Scores side by side
These two sit in different type classes (tank and tankless), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Suburban SAW6DEL (5322A) | Fogatti InstaShower 9 Pro (FS10B1S) |
|---|---|---|
| Overall rating | 3.2/5 | 3.0/5 |
| Value 40% | 11 $98.83 per gallon of tank ($592.99, 6 gal) | 35 $9.70 per 1,000 BTU ($639.99, 66,000 BTU) |
| Hot water output 35% | 91 14.1 gal/h recovery on gas | 84 up to 3.6 GPM |
| Warranty 25% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Suburban SAW6DEL (5322A) | Fogatti InstaShower 9 Pro (FS10B1S) | |
|---|---|---|
| Heat and water | ||
| Input capacity | 10,000 BTU | 66,000 BTU |
| Tank size | 6 gal | - |
| Gas recovery | 14.1 gal/h | - |
| Maximum flow | - | 3.6 GPM |
| Fuel | Propane + electric | Propane |
| Fit | ||
| Weight | - | 30.9 lb |
| Warranty | ||
| Warranty | 2 years | - |