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Written from the listing's specs, not from our own use · How we rate
On paper, the Baococo 18L Propane (4.76 GPM) gets the important things right: up to 4.76 GPM and built-in freeze protection. A good match for one shower at a time and not much more, rated 6.4/10 on its documented specs.
| Brand | Baococo |
|---|---|
| Category | Gas tankless water heaters |
| Fuel | Propane |
| Stated maximum flow | 4.76 GPM |
| Stated gas input | 115,425 BTU/h |
| Freeze protection | Stated in the listing |
| ASIN | B0HCBMN5QC |
Full listing title: 18L Tankless Water Heater Propane with Digital Display 4.76 GPM 115425 BTU
| Fuel | PropaneFull listing title |
|---|---|
| Stated maximum flow | 4.76 GPMFull listing title |
| Stated gas input | 115425 BTUFull listing title |
Rated from the listing's specs, no buyer reviews yet
What it's made for: one shower at a time and not much more.
Two gas tankless heaters on propane too, with about the same flow, closest to it on our rating, each with a dated price.
That's the maximum flow the listing states, and headline flows are usually quoted at a mild temperature rise. A cold January asks for a 63 °F rise (42 °F in, 105 °F out), and at that rise every tankless gives less than its headline; the maker's chart says how much. Counting 2 GPM per shower, as our calculator does, that's one shower and a sink at a time, maybe two showers where the water comes in warm.
What it has going for it
Freeze protection. Stated in the listing. Useful in a garage, a crawl space or a cabin that sits empty in winter, as long as the unit keeps power.
Propane: that's what the listing names. A propane unit runs off a tank outside, so the tank size and the regulator are part of the plan.
Natural gas: it's a different set of gas jets and pressures. Only the maker's conversion kit, if there is one, and a licensed gas fitter can switch it; ask before you order.
What the Baococo 18L Propane (4.76 GPM) listing names:
Read the installation manual for the vent, the gas line size and the clearances before you order; it overrides anything above.
At the price on Sep 30, 2026, each GPM of stated maximum flow works out at about $31.51 (price ÷ stated GPM, our arithmetic). That puts it in the cheaper third of the 10 gas tankless heaters we have a price and a stated flow for.
The online price is the heater alone. Venting, a bigger gas line where needed and the installer's day are a separate bill, often as big as this one.
The button opens the exact listing (ASIN B0HCBMN5QC), where today's price, stock and seller apply.
Two showers and the dishwasher at once? The Rheem RTG 8.4 GPM Propane Outdoor (7.5/10) states up to 8.4 GPM.
Want the high-efficiency kind? The ThermoMate Condensing Propane (7.6/10) is a condensing unit rated 0.86 UEF, per its listing.
On natural gas, not propane? The ThermoMate Condensing Natural Gas (7.7/10) runs on natural gas.
Our take
We like the Baococo 18L Propane (4.76 GPM) for up to 4.76 GPM and built-in freeze protection. No buyer has reviewed it yet, so our 6.4/10 comes from the spec sheet alone. The catch with this Baococo gas tankless heater: no stated temperature hold, while most picks here claim ±1 °F. We'd pick it if it will live in a garage, a cabin or another cold spot; otherwise, put it next to the Amzgachfktch 4.75 GPM Natural Gas first.
Old tank out, unit on the wall, vent through the wall or the roof. Plan the gas line for 115,425 BTU/h; a licensed pro handles it, and often a permit.
Hot water arrives after the cold already in the pipes, then stays. A trickle from a bathroom tap may not light the burner; open it a bit more.
January water comes in colder, so the same unit gives fewer GPM. Stagger the showers if you sized it tight.
Flush the heat exchanger with a pump and a descaler (the service valves make it an hour's job), and clean the inlet filter. Our flushing and descaling guide has the checklist.
Before the Baococo 18L Propane (4.76 GPM) goes in your cart, check your gas line: 115,425 BTU/h is a lot of gas at once, so ask your plumber whether the existing line can feed it.
4.76 GPM is the headline. In a northern January the water comes in near 42 °F, so a 105 °F shower needs a 63 °F rise and the real flow drops. Our flow-rate calculator runs the numbers for your house.
Ask the plumber to check the gas line size and the meter against the heater's input, and to quote the vent route at the same visit. Our install cost guide shows what that usually adds.
Read what it requires: a licensed install, the gas type and regular flushing are the usual conditions.
Hard water scales the heat exchanger. Service valves on the water lines turn the yearly flush into an hour with a bucket and a pump; our flushing and descaling guide shows the routine.
How the Baococo 18L Propane (4.76 GPM) stacks up against the closest alternative, the Amzgachfktch 4.75 GPM Natural Gas.
| Criterion | Baococo 18L Propane, 4.76 GPM | Amzgachfktch 4.75 GPM Natural Gas |
|---|---|---|
| Our rating | 6.4/10 | 7.0/10 |
| Max flow | 4.76 GPM | 4.75 GPM |
| Gas input | 115,425 BTU/h | 102,000 BTU/h |
| Temperature hold | Not stated | ±1 °F stated |
Pick the Amzgachfktch 4.75 GPM Natural Gas if you want our higher-rated option (7.0/10), with a stated ±1 °F hold; stay with the Baococo 18L Propane (4.76 GPM) for more flow (4.76 GPM) and a bigger burner (115,425 BTU/h).
We rate it 6.4/10 (fair). The rating comes from its documented listing alone, as no customer-review record is captured yet.
The listing states a maximum flow of 4.76 GPM and a gas input of 115,425 BTU/h. The headline flow is a mild-weather number: with cold winter water coming in, the same unit gives you less. Read the maker's flow chart at your winter rise, or let our flow-rate calculator do the sums.
Its listing states up to 4.76 GPM and freeze protection. These are the seller's figures, not our measurements: how steady the temperature is in your shower and how it copes with your winter water can't be read from a listing.
Your winter flow: 4.76 GPM is the headline. In a northern January the water comes in near 42 °F, so a 105 °F shower needs a 63 °F rise and the real flow drops. Our flow-rate calculator runs the numbers for your house. Vent and gas line: ask the plumber to check the gas line size and the meter against the heater's input, and to quote the vent route at the same visit. Our install cost guide shows what that usually adds. The warranty terms: read what it requires: a licensed install, the gas type and regular flushing are the usual conditions. Flushing: hard water scales the heat exchanger. Service valves on the water lines turn the yearly flush into an hour with a bucket and a pump; our flushing and descaling guide shows the routine.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula.