Product images: Amazon listings

Amzgachfktch 4.75 GPM Natural Gas Review

Name: Amzgachfktch 4.75 GPM Natural Gas
Brand: Amzgachfktch
SKU: B0GYD6WG7P

7.0Good · out of 10Rated from the listing's specs, no buyer reviews yet

Written from the listing's specs, not from our own use · How we rate

If you're after up to 4.75 GPM, the Amzgachfktch 4.75 GPM Natural Gas delivers, with temperature held within ±1 °F and built-in freeze protection on top. Think of it for a cabin, a garage apartment or an in-law suite: 7.0/10 on what its listing documents.

Price$189.99Price on Sep 30, 2026 · may have changed

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Specifications

Brand	Amzgachfktch
Category	Gas tankless water heaters
Fuel	Natural gas
Stated maximum flow	4.75 GPM
Stated gas input	102,000 BTU/h
Stated voltage	120 V
Temperature range	95 to 149 °F
Temperature hold	±1 °F, per the listing
Freeze protection	Stated in the listing
Water pressure	From 3.6 PSI
ASIN	B0GYD6WG7P

Full listing title: Tankless Water Heater 4.75 GPM Natural Gas Constant Hot Water

Listing evidence

Fuel	Natural Gas Full listing title
Stated maximum flow	4.75 GPM Full listing title
Stated gas input	102,000 BTU Listing text
Stated voltage	120V Listing text

Updated October 2026

Exact listing, ASIN B0GYD6WG7P

Rating from a published formula

Compared with its closest rivals

Two gas tankless heaters on natural gas too, with about the same flow, closest to it on our rating, each with a dated price.

Compare side by side ↗

Amzgachfktch 4.75 GPM Natural Gas

7.0Good · out of 10$189.99 Price on Sep 30, 2026 · may have changed

Stated: 4.75 GPM · 102,000 BTU/h · 120 V
Gas tankless water heaters

This product ↑

Ranein Condensing Natural Gas, 5.1 GPM

7.4Good · out of 10$559 Price on Sep 30, 2026 · may have changed

Stated: 5.1 GPM · 120,000 BTU/h · 120 V
Gas tankless water heaters

See the review ↗

MIZUDO 120,000 BTU Natural Gas

7.6Very good · out of 10$539.99 Price on Sep 30, 2026 · may have changed

Stated: 5.1 GPM · 120,000 BTU/h
Gas tankless water heaters

See the review ↗

Up to 4.75 GPM from a 102,000 BTU burner

That's the maximum flow the listing states, and headline flows are usually quoted at a mild temperature rise. In January the water comes in nearer 42 °F, so a 105 °F shower needs a 63 °F rise and the unit gives you less; the flow chart in the manual shows how much less. 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

What changes in the morning shower rush

±1 °F hold. The burner adjusts as the flow changes, so the shower stays where you set it when somebody opens the kitchen tap. On paper, at least: that is the seller's claim.

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.

Natural gas or propane?

Natural gas: that's what the listing names, so it runs off the gas line, which may need upsizing for a tankless burner.

Propane: 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; buy the propane version instead if you have a tank.

Great for you if…

A shower that suddenly runs cold drives you mad
It will live in a garage, a cabin or another cold spot

Skip it if…

Two showers often run at once in your house: 4.75 GPM is a one-shower unit
You'd rather wait for buyer reviews: none are captured for this listing yet
You want the high-efficiency kind: the listing doesn't call it condensing

What Amzgachfktch promises

The seller states, word for word, in the Amzgachfktch 4.75 GPM Natural Gas listing:

Delivers a powerful 4.75 GPM flow rate, supporting up to 3-4 fixtures simultaneously—shower, kitchen faucet, and bathroom sink all at once.
The intuitive LED display shows real-time water temperature, operating status, and fault codes at a glance—making it easy to monitor performance and troubleshoot if needed.
Compatible with low water pressure (3.6-116 PSI) for smooth operation in older homes or multi-story buildings.

Their words and their figures, not our measurements. How steady your shower stays when someone opens the kitchen tap, and what's left of that flow in January, no listing can tell you.

Amzgachfktch 4.75 GPM Natural Gas, view 3

Gas, venting and what's in the box

What the Amzgachfktch 4.75 GPM Natural Gas listing names:

Up to 4.75 GPM
102,000 BTU/h input
Natural gas
Starts from 3.6 PSI
±1 °F temperature hold claimed
95 to 149 °F setpoint
Freeze protection named

The installation manual has the last word on venting, gas line and clearances; your installer reads it before you order.

Amzgachfktch 4.75 GPM Natural Gas, view 4

Price and cost per GPM of stated flow

$189.99 Price on Sep 30, 2026 · may have changed

At the price on Sep 30, 2026, each GPM of stated maximum flow works out at about $40.00 (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.

Count the install in the budget: vent pipe, possibly a 3/4" gas line, and a licensed plumber or gas fitter.

The button opens the exact listing (ASIN B0GYD6WG7P), where today's price, stock and seller apply.

Amzgachfktch 4.75 GPM Natural Gas, view 5

A better fit for your house?

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 Natural Gas (7.7/10) is a condensing unit rated 0.86 UEF, per its listing.

On propane, not natural gas? The MIZUDO 120,000 BTU Propane (7.6/10) runs on propane.

Our take

The verdict

The Amzgachfktch 4.75 GPM Natural Gas earns its place with up to 4.75 GPM and temperature held within ±1 °F. No buyer reviews yet, so this Amzgachfktch gas tankless heater has to win you over on paper. The catch with the Amzgachfktch: no word on the warranty. We'd pick it if a shower that suddenly runs cold drives you mad; otherwise, put it next to the GASLAND BE158B Propane (1.58 GPM) first.

Check the price on Amazon ↗Affiliate link · price and stock on AmazonAll gas tankless water heaters →

Living with it

Install day

Old tank out, unit on the wall, vent through the wall or the roof. Plan the gas line for 102,000 BTU/h; a licensed pro handles it, and often a permit.

The first shower

Hot water arrives after the cold already in the pipes, then stays (within ±1 °F, per the listing). A trickle from a bathroom tap may not light the burner; open it a bit more.

The first winter

January water comes in colder, so the same unit gives fewer GPM. Stagger the showers if you sized it tight.

Once a year

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.

The one thing we'd check first

Before the Amzgachfktch 4.75 GPM Natural Gas goes in your cart, check your gas line: 102,000 BTU/h is a lot of gas at once, so ask your plumber whether the existing line can feed it.

Before you buy

Your winter flow

4.75 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.

How it compares

How the Amzgachfktch 4.75 GPM Natural Gas stacks up against the closest alternative, the GASLAND BE158B Propane (1.58 GPM).

Criterion	Amzgachfktch 4.75 GPM Natural Gas	GASLAND BE158B Propane, 1.58 GPM
Our rating	7.0/10	7.4/10
Max flow	4.75 GPM	1.58 GPM
Gas input	102,000 BTU/h	Not stated
Temperature hold	±1 °F stated	Not stated
Warranty	Not stated	1 years

Pick the GASLAND BE158B Propane (1.58 GPM) if you want our higher-rated option (7.4/10), with a longer stated warranty (1 years); stay with the Amzgachfktch 4.75 GPM Natural Gas for more flow (4.75 GPM) and a bigger burner (102,000 BTU/h).

Compare side by side ↗See the GASLAND BE158B Propane, 1.58 GPM review →

The score in detail

How we rated it

Spec-based rating on a 4.5–8.5 scale: 4.5 + average of the 4 criteria × 0.4. Capped at 8.5 because no customer evidence is included.

Key specifications

8 / 10

Build, warranty & certifications

3 / 10

Listing documentation

7 / 10

Fit & compatibility

7 / 10

This product has no captured buyer-review record yet, so its rating comes from the documented listing alone: four criteria scored out of 10 (key specifications; build, warranty and certifications; listing documentation; fit and compatibility), placed on a 4.5–8.5 scale. Read the full methodology.

Read the methodology →

Frequently asked questions

Is the Amzgachfktch 4.75 GPM Natural Gas any good?

We rate it 7.0/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.

How much hot water can the Amzgachfktch 4.75 GPM Natural Gas deliver?

The listing states a maximum flow of 4.75 GPM and a gas input of 102,000 BTU/h on 120 V. 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.

What do you get with the Amzgachfktch 4.75 GPM Natural Gas?

Its listing states up to 4.75 GPM, temperature held within ±1 °F 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.

What should I check before ordering the Amzgachfktch 4.75 GPM Natural Gas?

Your winter flow: 4.75 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.

Where can I buy the Amzgachfktch 4.75 GPM Natural Gas?

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.

Have you used the Amzgachfktch 4.75 GPM Natural Gas yourselves?

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.

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