A sink usually moves when you use it because the fixings holding it in place have loosened or failed, such as the clips under a kitchen worktop or the brackets and screws holding a bathroom basin to the wall. Movement can also come from the unit, pedestal or worktop underneath.
A moving sink may not seem urgent, but it can put strain on the tap and waste connections over time. Dealing with it early can help avoid leaks and damage to the surrounding worktop or wall.
Kitchen Sinks
Inset kitchen sinks are usually held in place by clips that grip the underside of the worktop. If these clips loosen, break or were not tightened properly, the sink may lift or shift when it is leaned on or when heavy pans are put in it.
Water getting under the sink edge can also damage the worktop around the cut-out, which may weaken the support for the sink. Undermounted sinks rely on fixings or brackets underneath, which can also work loose.
Bathroom Basins
Wall-hung basins are fixed with brackets, bolts or screws. If the fixings loosen or the wall is not strong enough for them, the basin may tilt or move when someone leans on it.
In older properties, the wall behind a basin may have been patched or weakened over the years, which can make fixings less secure.
Pedestal basins may move if the pedestal is not fixed or the floor is uneven. A basin on a vanity unit may move if the unit itself is not secured to the wall.
Why It Matters for the Plumbing
Every time the sink moves, the tap connections, waste pipe and seals underneath can be pulled or twisted slightly. Over time this may loosen joints and lead to leaks in the cupboard or behind the basin.
Movement can also break the sealant around the edge, letting water seep underneath. This may show as staining, swelling or mould around the sink or on the cupboard below.
A sink that moves does not necessarily need replacing. In many cases it can be refitted and secured. It depends on the condition of the sink, the worktop or wall and the fixings.
What to Do
If you notice the sink moving, it is better to have it looked at soon rather than waiting for a leak to appear.
Avoid leaning on or putting weight on a loose sink or basin, as a wall-hung basin that comes away could be dangerous and could damage the pipework. Check underneath for any signs of water.
Our page on professional sink repairs explains how loose and leaking sinks are assessed and repaired. If you are planning wider changes to the room, our kitchen plumbing page may also be useful.
If a sink or basin in your Poole home has started to move, a plumber can check the fixings and connections and explain the options.