Laundry Trough Buying Guide: How to Choose the Right Laundry Sink

A laundry trough is one of the most practical fixtures in the laundry, but choosing the right one involves more than simply finding a bowl that fits the available space. The right trough should provide enough capacity for soaking, hand washing and household cleaning while still leaving useful benchtop, storage and appliance space.

This guide explains the main things to compare before ordering, including trough size, bowl capacity, cabinet options, topmount versus undermount installation, washing machine connections, tapware and plumbing. You can also browse our Laundry Sinks & Troughs to compare available sizes and configurations while planning your laundry.

What Is a Laundry Trough?

A laundry trough is a deeper utility sink designed for jobs that are often impractical in a bathroom basin or smaller kitchen sink. Typical uses include soaking clothes, hand washing, filling buckets, rinsing muddy items, cleaning household equipment and washing larger objects.

The terms laundry trough, laundry tub and laundry sink are often used interchangeably, but the designs can vary considerably. A traditional trough may come as a complete sink-and-cabinet unit, while a modern laundry sink can be installed into custom cabinetry in much the same way as a kitchen sink.

Start With How You Actually Use the Laundry

Before comparing litres or dimensions, think about what normally goes into the sink. If the laundry is mainly used for filling a bucket and occasional hand washing, a compact trough may be enough. If you regularly soak clothing, wash sports equipment, rinse large cleaning items or use the laundry for heavier household tasks, a larger and deeper bowl can be much more practical.

Do not automatically choose the largest trough that fits. An oversized sink can reduce valuable bench and cabinet space that may be more useful for laundry baskets, detergents or folding clothes.

What Size Laundry Trough Do I Need?

Capacity gives you a useful starting point, but litres alone do not tell the whole story. A compact 20L or 30L trough can work well in an apartment, European laundry or narrow utility room. Around 35L to 45L is a practical range for many family laundries where soaking, bucket filling and general cleaning are regular tasks.

When comparing sizes, check the internal bowl width, bowl depth and overall external dimensions. A deeper bowl can provide useful capacity without requiring an excessively wide cabinet.

Compare different capacities and cabinet configurations in our Laundry Sinks & Troughs collection. If your available space is particularly limited, you can also compare our Small Sinks.

Laundry Trough with Cabinet or Sink Only?

A complete trough-and-cabinet unit can be a straightforward option when replacing an older laundry tub or completing a practical renovation. The sink and cabinet are already designed to work together, which can reduce the amount of custom joinery required.

A sink-only design gives you more freedom. It can be integrated into custom cabinetry with a continuous benchtop, additional drawers or storage beside the sink. This approach can create a more kitchen-style laundry and may suit renovations where appearance and bench space are priorities.

Before choosing, think about what needs to fit below the bowl. Plumbing, waste fittings, washing machine connections and internal storage all compete for cabinet space.

Topmount or Undermount Laundry Sink?

A topmount or drop-in sink is installed from above the benchtop, leaving a visible rim around the bowl. It is practical for many laundry renovations and works with a wide range of benchtop designs.

An undermount sink is installed beneath a suitable benchtop. This creates a cleaner transition between the bench and bowl and makes it easier to wipe water or residue directly into the sink. However, undermount installation requires accurate benchtop fabrication and a compatible surface.

If you are considering this installation style, compare our Undermount Sinks and confirm the final cut-out with your cabinetmaker or benchtop fabricator.

What Is a Washing Machine Bypass?

A washing machine bypass provides a connection that allows the washing machine discharge to connect into the laundry waste system rather than requiring the hose to discharge visibly into the trough.

Selected trough-and-cabinet units include a bypass kit or provision for concealed washing machine connections. This can create a neater laundry setup, but not every laundry sink includes the same connection.

Before ordering, ask your plumber how the washing machine waste will be connected and whether a bypass is required. The trough waste, washing machine position and cabinetry should be planned together rather than treated as separate parts of the renovation.

Choose the Laundry Tapware at the Same Time

Check whether the trough has a pre-drilled tap hole, a tap landing or no tap hole at all. A sink with no tap hole may require the mixer to be mounted through the benchtop, while a traditional trough-and-cabinet unit may have a dedicated mixer position.

For a deep laundry trough, a mixer with sufficient height and spout reach makes filling buckets and rinsing the bowl easier. A swivel spout is practical for general use, while a pull-out mixer provides additional reach when rinsing larger items or cleaning around the sink.

Compare suitable Sink Mixers before the plumbing position is finalised.

Do I Need Separate Washing Machine Taps?

This depends on how the laundry plumbing is designed. Washing machine taps may be exposed above the trough, concealed inside cabinetry or positioned in another accessible location depending on the renovation.

If you want the washing machine connections to be less visible, plan them before cabinetry and wall finishes are completed. Browse our Washing Machine Taps when coordinating the complete laundry setup.

Check the Waste and Overflow

Do not assume every laundry trough comes with the same waste or overflow configuration. Some complete laundry units include a basket waste or bypass kit, while other sink-only models require compatible waste fittings to be selected separately.

Likewise, some laundry sinks have no overflow. Always check the individual product specifications for the waste size, overflow configuration and included components before ordering.

What Should I Measure Before Buying a Laundry Trough?

Start with the available width, depth and height, but do not stop at the outside dimensions. Check the internal cabinet space, benchtop depth, washing machine position, waste location and water connections.

For a sink-only installation, confirm the minimum cabinet size and exact benchtop cut-out. If replacing an existing sink, measure the existing opening as well as the outside dimensions. A new sink with a similar overall size does not necessarily use the same cut-out.

For a complete trough-and-cabinet unit, check the distance to nearby walls, doors and the washing machine. Make sure cabinet doors can open comfortably and that the plumbing does not interfere with the storage area.

Common Laundry Trough Buying Mistakes

One of the most common mistakes is choosing a trough purely by litre capacity. A 45L sink may sound better than a smaller option, but it may unnecessarily reduce bench or storage space if the laundry is rarely used for soaking large items.

Another mistake is finalising cabinetry before choosing the sink. Bowl depth, waste position, tap location and washing machine connections can all affect the cabinet design. It is usually easier to choose the trough first and then have the cabinetmaker and plumber plan around the exact product.

Also avoid assuming that every laundry trough includes a waste, overflow or washing machine bypass. These details vary between models and should be checked individually.

Which Laundry Trough Is Right for Your Home?

For a small apartment or European laundry, prioritise compact dimensions and preserving bench space. For a family laundry, a medium or larger bowl around 35L to 45L can provide useful capacity for soaking and cleaning. If you are installing custom cabinetry, a sink-only topmount or undermount design gives you greater freedom with storage and benchtop layout.

If you are replacing a traditional laundry tub and want a straightforward solution, a trough-and-cabinet combination may be the simplest option. Compare the available configurations in our Laundry Sinks & Troughs collection and consider the sink, cabinet, tapware, waste and washing machine connections together.

Need Help Choosing a Laundry Trough in Melbourne?

Melbourne Bathroom Shop offers laundry sinks and troughs for compact laundries, family homes, apartments and renovation projects. Visit our Blackburn showroom at Shop 1A, 214-218 Whitehorse Road, Blackburn VIC 3130 with your laundry measurements, floor plan or photos and our team can help you compare suitable sizes, cabinet options and tapware.

For final installation, have your plumber and cabinetmaker confirm the waste position, washing machine connections, cabinet dimensions and benchtop cut-out before fabrication or installation.