Suburban ST-42 (5481A)
#11 in TanklessFull review
A tankless heater rated 42,000 BTU for endless hot water in an RV that has the cutout for it.
Amazon $404.99$404.99
The Suburban ST-42 (5481A) rates 3.0 among tankless RV water heaters; the Camplux RG600W 6 Gallon rates 2.7 among tank ones. The Suburban ST-42 (5481A) costs $32 less ($404.99 vs $436.99).
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.
Camplux RG600W 6 Gallon
#21 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 $436.99$436.99
Scores side by side
These two sit in different type classes (tankless and tank), 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 ST-42 (5481A) | Camplux RG600W 6 Gallon |
|---|---|---|
| Overall rating | 3.0/5 | 2.7/5 |
| Value 40% | 35 $9.64 per 1,000 BTU ($404.99, 42,000 BTU) | 41 $72.83 per gallon of tank ($436.99, 6 gal) |
| Hot water output 35% | 50 maximum flow not published (neutral score used) | 50 recovery rate not published (neutral score used) |
| Warranty 25% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Suburban ST-42 (5481A) | Camplux RG600W 6 Gallon | |
|---|---|---|
| Heat and water | ||
| Input capacity | 42,000 BTU | 12,000 BTU |
| Tank size | - | 6 gal |
| Fuel | Propane | Propane + electric |
| Fit | ||
| Weight | 21 lb | 35 lb |
| Warranty | ||
| Warranty | 2 years | - |