The complete guide
How to Choose a Shower Drain Hair Catcher That Actually Fits
The slow shower drain nobody deals with until it is too late
Most blocked shower drains are not dramatic. They start as a shower that takes a few seconds too long to clear, then a small puddle around your feet, then a proper pool that sits there after you have turned the water off. By then the pipe below has a wad of hair bound together with soap and conditioner, and getting it out is unpleasant at best and expensive at worst.
The cause is almost always hair. A single person sheds a surprising amount in the shower, and long hair is worse because strands wrap around anything they touch. Standard drain grates have gaps wide enough to let most of that straight through. The grate stops a bottle cap. It does very little about hair.
A hair catcher fixes the problem at the one point where it is easy to fix, right at the surface. Hair lands on the strainer instead of in the pipe. You see it, you wipe it, it goes in the bin. That is the whole system.
What this strainer is and how it works
The Square Shower Hair Strainer 125mm is a flat stainless steel cover measuring 12.5 cm on each side, in a polished silver finish. It sits over your shower drain. The face is perforated with holes sized to pass water and block hair.
The physics are simple. Water is thin and finds the holes easily. Hair is long, stringy and tends to lie flat across a surface rather than thread itself through a small opening. So the water goes down and the hair stays put, sitting on top in plain view.
The design is removable, which sounds minor but is the whole reason this kind of product works in real homes. If clearing it required unscrewing something, you would not bother. Because you just lift it, wipe it and drop it back, it becomes a ten second habit rather than a chore.
It is stainless steel rather than plastic, and in a shower that matters. Plastic strainers discolour, go brittle and warp near hot water over time. Stainless handles constant wet without complaint, and a polished surface sheds soap film when you rinse it rather than holding onto a cloudy layer.
Who this suits
This is a good fit if you have a flat tiled shower floor with a drain opening narrower than 12.5 cm. That covers a lot of standard showers and a lot of wet rooms.
It suits households with long hair most obviously. If two or three people with shoulder-length or longer hair share one shower, you are the exact reason this product exists. It also helps in homes with older plumbing, where pipes are narrower or already partially restricted and have no spare capacity for hair.
Renters find a removable drain cover useful because there is nothing to install and nothing to undo when you leave. Anyone who washes a dog in the shower will get value from it too, since pet hair sheds in volume and clogs a pipe just as readily as human hair.
It is less suited to a bathtub plug hole, which is usually recessed and far smaller. It is also not the answer if your drain opening is already wider than 12.5 cm, because the strainer needs to rest on flat floor around the edge of the opening rather than sink into it.
Measure first, always
This is the single step that decides whether you are happy with your purchase, and it takes under a minute.
Take a tape measure and measure the widest point of the drain opening itself, edge to edge. Then measure the flat tiled area around that opening. For a 12.5 cm square cover to sit properly, you want the opening comfortably under 12.5 cm, with at least a centimetre or two of flat floor on each side for the edges to rest on.
Watch out for a steeply sloped floor. Many shower trays fall sharply towards the drain in the last few centimetres. If the fall is steep, a flat cover will rock rather than sit. A gentle slope is usually fine, since the cover only needs contact around its edges.
Also look at where your shower head points. If the stream lands directly on one edge of the drain, a flat cover can be nudged out of position. Centring the strainer over the opening generally solves it.
Living with it day to day
The routine is short. After a shower, glance at the strainer. If there is a visible clump of hair, pick it up with tissue or a paper towel and bin it. Do not wash the hair down the drain, because that defeats the entire point.
Once a week or so, lift the strainer out and rinse it under the tap. If soap and conditioner have built a film on the surface, a drop of dish soap and a soft brush clears it quickly. Dry it with a cloth before you put it back and the polished finish keeps its shine instead of collecting water spots.
Avoid bleach, scouring powder and steel wool. They can dull or scratch a polished stainless surface, and they are not necessary for what is essentially soap residue. Mild and gentle wins here.
Every few months, lift the strainer and your original drain grate and have a look underneath. Even with a good hair catcher in place, a little residue finds its way down over time. Catching it early is far easier than dealing with a full blockage.
What a hair catcher will and will not do
A strainer prevents problems. It does not undo them. If your shower is already draining slowly, clear that blockage first, then fit the strainer so the problem does not come back. Putting a cover over an existing clog just hides it.
It also will not stop everything. Fine grit, sand from the beach and dissolved soap will still pass through the holes, as they should. The strainer targets the one thing that causes the vast majority of shower blockages, which is hair.
And it will not stop smells on its own. Drain odour usually comes from residue in the pipe or a trap that has dried out. That said, keeping hair out of the pipe removes one of the main things that holds residue in place, so a good hair catcher does help indirectly over time.
Comparing options
If you are weighing up choices, there are broadly three types. Insert strainers drop into the drain opening and need a precise diameter match. Dome or mushroom catchers sit in the opening and stick up, which some people find ugly or easy to kick. Flat covers like this one rest on top of the floor and are the most forgiving on fit, as long as the opening is smaller than the cover.
Flat covers also have the advantage of being easy to spot and easy to lift. Nothing is wedged in. Nothing needs prying out with a fingernail.
On material, stainless steel costs more than plastic and lasts longer. A plastic strainer is fine for a year or two. A stainless one is a buy-once item if you look after it.
The short version
Hair causes most blocked shower drains, and a hair catcher stops the hair at the surface where it is easy to deal with. This square strainer is 12.5 cm by 12.5 cm, made from polished stainless steel, and lifts straight out for cleaning.
Measure the width of your drain opening and the flat floor around it before you order. If the opening is under 12.5 cm and the floor is reasonably flat, this is a straightforward fix for a problem that only gets worse if you ignore it.
Then build the habit. Wipe it after showers, rinse it weekly, and you will likely never think about your shower drain again.