Mini-tank heater ยท BISELONG

BISELONG BI-8G 8-Gallon Mini-Tank Water Heater

8-gallon mini-tank heater

8 gal tank1500120 V

Updated October 2026

The short answer

A well-specified mini-tank heater for one sink far from the main heater.

Delivers
8-gallon tank.
Watch for
Runs out after its stored gallons.
Suits
One sink far from the main heater.
Power
1500
Voltage
120
Breakers (maker)
20amp circuit breaker
Tank
8 gal
Connections
1/2" npt
Material
ABS, Copper, Stainless Steel
Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

What it delivers

The BISELONG BI-8G 8-Gallon Mini-Tank Water Heater is a mini-tank heater holding 8 gallons, rated at 1500 on 120 volts.

It stores a few gallons of hot water right at the fixture, so the tap runs hot at once instead of waiting for the main heater.

At 120 volts it plugs into or wires to an ordinary household circuit, which is why mini tanks are a common retrofit.

Listed details: features: Pressure Release Valve, Rustproof; connections: 1/2" npt; material: ABS, Copper, Stainless Steel; model: BI-8G.

The listing gives dimensions of 14.1 in (W) x 14.8 in (H), a weight of 10.5 lb and t-tube, hose, safety valve in the box.

Right unit for this house?

Install it when

  • One sink far from the main heater
  • Wet bars, garages and offices

Look at another unit when

  • Showers or whole-house use
  • Long continuous draws

Strengths and trade-offs

Strengths

  • 8-gallon tank
  • 120 V
  • Hot water at the tap in seconds

Trade-offs

  • Runs out after its stored gallons
  • Needs room under the sink

Install limits

  • Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.

Rated performance

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Model numberBI-8GRetailer
Tank8 galRetailer
Dimensions (seller)14.1"W x 14.8"HRetailer
Features (seller)Pressure Release Valve, RustproofRetailer
Power1500Retailer
Voltage120Retailer
Product weight10.5 lbRetailer
MaterialABS, Copper, Stainless SteelRetailer
Breakers (maker)20amp circuit breakerRetailer
Connections1/2" nptRetailer

Rival units at this flow

More point-of-use water heaters rated for similar demand

Full point-of-use water heaters spec grid

Final verdict

A well-specified mini-tank heater for one sink far from the main heater.

Buy this unit

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

What is the BISELONG BI-8G 8-Gallon Mini-Tank Water Heater for?
The BISELONG BI-8G 8-Gallon Mini-Tank Water Heater is a mini-tank heater holding 8 gallons, rated at 1500 on 120 volts.