A space-saving toilet sink combo puts a handwashing basin above or beside a toilet, reducing the floor area needed for separate fixtures. The Simple Project 3-in-1 is best for buyers seeking an integrated sink and faucet with a stated water-reuse design; the SUPERFLO is a better fit for shoppers comparing an elongated bowl and a specified 12-inch rough-in. For portable use, consider VINGLI, while Sinkology is a retrofit option for an existing toilet.
| Product | Best For | Type |
|---|---|---|
| Simple Project 3-in-1 | Small bathrooms and water reuse | Integrated toilet and sink |
| Simple Project 2-in-1 | Buyers seeking a 17-inch seat height | Integrated toilet and sink |
| SUPERFLO Elongated Toilet | Elongated bowl and 12-inch rough-in | Integrated toilet and sink |
| VINGLI Portable Combo | Camping, RVs, and travel | Portable toilet and sink |
| Sinkology SinkPositive GreenFlow | Retrofitting an existing toilet | Tank-cover sink attachment |
Simple Project 3-in-1 Toilet With Sink
This integrated unit combines a toilet, a sink, and an included faucet, with the basin positioned on top of the tank. Its compact configuration is intended to save floor space in a small bathroom, guest bath, or apartment.
Best for: Buyers who want a permanent, all-in-one fixture and value the listed water-reuse feature. The product description says water from handwashing is stored in the toilet tank for use during a flush. It also lists a 1.28-gallon-per-flush single flush.
Consider: The listed features do not provide installation dimensions or rough-in details. Confirm fit and plumbing requirements before choosing it.
Simple Project 2-in-1 17-Inch Tall Toilet
This toilet has a sink and faucet on top of the tank, creating a single fixture for handwashing and toilet use. The listed seat height is 17 inches, and the seat is described as soft-closing.
Best for: Small bathrooms, guest bathrooms, and apartments where reducing the number of separate fixtures matters. Its 17-inch seat height may also suit buyers looking for a taller seat than a standard-height toilet, according to the product description.
Consider: The listed features do not state the rough-in measurement or provide full installation specifications. Check those details before planning a replacement.
SUPERFLO Elongated Toilet With Sink
The SUPERFLO combines an elongated toilet with a sink and included faucet on the tank. Its listed specifications include a 12-inch rough-in, a 17.2-inch height, and a 1.28-gallon-per-flush single flush. The seat is described as soft-closing.
Best for: Buyers who want an elongated bowl and need to compare the fixture against a 12-inch rough-in. It is also a candidate for shoppers seeking a taller seat and a built-in handwashing basin.
Consider: The rough-in measurement is specific to the listed product. Measure the existing plumbing location rather than assuming it will match.
VINGLI Portable Sink And Toilet Combo
This portable setup pairs a handwashing station with a flushing toilet. The sink has a 5-gallon water tank and a manually controlled foot pump. The toilet uses a piston pump and has a 3-gallon flushing tank and a 5.3-gallon waste tank. The product is described as detachable, lightweight, and requiring no toilet installation.
Best for: Camping, RV, boat, and road-trip use where a fixed bathroom fixture is not practical. Its separate water and waste tanks make it a portable alternative to an installed toilet sink combo.
Consider: It is a portable system, not a permanent replacement for a plumbed bathroom fixture. Account for tank capacity and waste disposal when planning use.
Sinkology SinkPositive GreenFlow Retrofit
Unlike the integrated toilets above, this product is a tank-sink retrofit. Its listed design replaces an existing toilet tank cover and supplies fresh water through a faucet. The listing says it can be installed without plumbing changes.
Best for: People who want a sink above an existing toilet without replacing the entire toilet. It may suit small bathrooms, tiny homes, and RVs where the current toilet can remain in place.
Consider: This is not a complete toilet-and-sink fixture. Check the existing tank and cover configuration against the product’s requirements before ordering.
Buying Guide: How To Choose A Toilet Sink Combo
Do you need a permanent fixture or a portable unit?
Integrated models such as Simple Project and SUPERFLO combine the sink and toilet into one bathroom fixture. A retrofit attachment, such as Sinkology, is intended to adapt an existing toilet. VINGLI is designed for portable use and has separate water and waste tanks. Choose based on whether the unit will serve a fixed bathroom or travel use.
Will the fixture fit your bathroom?
Measure available floor space, the distance from the wall to the toilet drain, and the space above the tank. Compare those measurements with the product’s installation specifications. SUPERFLO lists a 12-inch rough-in; the other supplied product details do not provide a rough-in measurement. Do not assume models share the same dimensions.
What sink and water features matter?
Check whether a faucet is included, how the sink gets water, and whether used wash water is reused. The Simple Project 3-in-1 and SUPERFLO descriptions mention storing handwashing water for a toilet flush. Sinkology describes a fresh-water faucet and no plumbing changes. VINGLI uses a foot pump and self-contained tanks.
How should you compare comfort and maintenance?
Compare seat height, bowl shape, flush type, and tank capacity where those details are provided. The Simple Project 2-in-1 lists a 17-inch seat height; SUPERFLO lists 17.2 inches and an elongated bowl. Portable systems require attention to water supplies and waste capacity. Review installation and cleaning instructions for any model before purchase.
Frequently Asked Questions
What is a toilet sink combo?
It is a toilet paired with a handwashing sink, commonly positioned above the toilet tank to use less floor space. Some models are complete fixtures; others are retrofit attachments.
Can toilet sink combos reuse handwashing water?
Some products are described as storing sink water in the toilet tank for a later flush. Check the individual product details because not every sink-and-toilet combination lists this feature.
Is a portable toilet sink combo suitable for a home bathroom?
A portable model such as VINGLI is intended for travel and temporary settings. It has water and waste tanks, so it differs from a permanently plumbed bathroom fixture.
What should I measure before buying?
Measure the available footprint, rough-in, tank area, and nearby clearance. Compare those measurements with the product’s installation specifications before selecting a model.