Discover compact, water‑saving toilet tank sinks designed to maximize space and promote handwashing without sacrificing style. This guide highlights five ceramic tank sink models that fit a range of standard toilets, with practical features for tight spaces, eco‑mriendly setups, and DIY installations. Each selection emphasizes ease of use, compatibility, and durable construction to support efficient daily routines.
| Product | Brand | Key Feature |
|---|---|---|
| Sinkology | ||
| SinkTwice | ||
| SinkTwice | ||
| SUPERFLO Elongated Toilet with Sink | SUPERFLO | |
| Simple Project Modern Elongated Toilet with Sink | Simple Project |
Sinkology SinkPositive GreenFlow Toilet Tank Sink
The SinkPositive GreenFlow model from Sinkology presents a compact tank cover solution that integrates a sink on top of the toilet tank. Its adjustable dimensions (18″ with flexibility) help fit smaller bathrooms, tiny homes, or RV setups. The unit is designed to replace the existing toilet tank cover, enabling a hand‑washing sink while conserving floor space. Ideal for eco‑conscious homes seeking an unobtrusive, space‑saving fixture that maintains functional hygiene without costly renovations.
Sink Twice Toilet Tank Sink – 15.25″ to 16.8″
Designed to fit most standard toilets in the 15.25″ to 16.75″ range, this model from SinkTwice offers a hands‑free faucet that activates with motion. Water diverted from the refill cycle is used to flush, delivering potential savings on water usage—up to tens of thousands of gallons annually in high‑use environments. The unit emphasizes a practical, touchless experience for guests and households aiming to reduce waste without sacrificing convenience.
Sink Twice Adaptable Toilet Tank Sink
With a focus on compatibility, the Sink Twice Adaptable is engineered to work with a broad range of toilet models. It integrates a built‑in spout and sink, redirecting refill water to rinse hands and then use for flushing. Manufactured in the USA from durable ABS plastic, this model targets toilets approximately 16.8″ tall or smaller, and is positioned as a flexible, widely compatible option for gravity‑fed systems.
Sink Twice For Glacier Bay Two Piece Dual Flush
This model adapts to Glacier Bay two‑piece dual flush toilets, offering a built‑in faucet and a sink that captures refill water for handwashing. The unit is manufactured in the USA from durable ABS plastic and is designed to pair with dual‑flush configurations. By routing soiled water back into the flush cycle, it supports a practical, water‑sensitive bathroom routine in compact spaces.
SUPERFLO Elongated Toilet With Sink
The SUPERFLO model combines an elongated toilet with a built‑in sink and faucet on the tank. It emphasizes a space‑saving approach for small bathrooms, with a single flush system and a standard height of around 17.2 inches for comfortable use. Aimed at maximizing floor space, this unit enables convenient handwashing directly above the toilet while contributing to overall water efficiency by reusing tank water for flushing on subsequent cycles.
Simple Project Modern Elongated Toilet With Sink
The Simple Project system features a 3‑in‑1 design with an elongated toilet and a top sink plus faucet integrated into the tank. It is positioned as an ideal option for tight spaces, apartments, and guest baths, offering a 1.28 GPF single flush tied to water‑saving performance. The compact footprint promotes efficient water use while providing a convenient handwashing area above the toilet.
Buying Guide: Key Purchase Considerations
- Toilet compatibility: Check rough‑in measurements, height, and overall dimensions to ensure the sink top fits your specific model and bathroom layout. Some units are tailored for gravity‑fed tanks and may not work with jet‑fed or tankless systems.
- Water footprint: Look for configurations that reuse refill water for flushing or provide dual‑flush options. This can maximize water savings, especially in high‑traffic bathrooms.
- Installation and maintenance: Consider whether the unit requires professional installation or if it’s a DIY replacement. Review the included installation kit, warranty coverage, and accessibility for cleaning the sink and surrounding area.
- Materials and durability: ABS plastic and vitreous china offer different levels of resilience. For households with heavy daily use, focus on solid construction and long‑lasting fixtures.
- Space utilization: Evaluate the overall footprint, including the sink width, depth, and clearance around the toilet. Compact designs are best for small bathrooms or mobile living spaces.
- Aesthetics and finish: Choose a finish that matches your bathroom’s style. Ceramic and porcelain options typically pair well with modern décor, while neutral colors blend into most palettes.
- Environmental impact: Prioritize models that minimize wastewater, use recycled materials where possible, and comply with regional plumbing standards.
- Warranty and support: Verify warranty terms and the availability of customer support, spare parts, and replacement fittings if needed.