A drain part has one job, and it only does that job if it fits. A hair catcher that is too small slides off the grate. A plug that is a few millimetres out will not hold water. This guide covers how to measure, which product suits which problem, and when the job belongs to a licensed plumber.
Start by measuring
Use a ruler or tape measure and work in millimetres. Measure straight across the inside of the drain opening. That is the inside diameter of the outlet. If you are replacing a grate, strainer or plug, measure across the outside of the old one too. Write both numbers down.
Then check them against the product page. Sizes there are the maker's stated sizes, and makers often give them in inches, so convert before you compare. Drains come in several common sizes and older homes can have odd ones, so measure your own and do not assume.
Hair catchers: over the drain or inside it
Over the drain. These are flat or domed covers that lie on top of the shower or bath drain. They only need to be wider than the drain opening, so the fit is forgiving. You can see the hair collect and lift it off.
Inside the drain. These drop into the outlet. They sit out of sight and do not move underfoot, but they have to match the inside diameter of your drain. Measure carefully for this type.
Either kind only works if you empty it. Clear it before water starts to pool around your feet.
Kitchen sink strainers and plugs
A sink strainer sits in the kitchen sink outlet and catches food scraps. A basket strainer drops into the outlet, so measure the inside of the hole. A flat mesh strainer rests on top and needs to be wider than the hole.
For a replacement plug, measure the plughole, or the old plug across its widest point. Basins, kitchen sinks and baths often take different sizes, so measure each one.
Plunger or drain snake
When a plunger works. A plunger moves water back and forth against a blockage. It works best on a soft clog close to the fixture, with enough water in the sink or bowl to cover the rubber cup. Cover the overflow hole with a wet cloth so the pressure goes down the pipe.
Cup or flange. A cup plunger has a flat rim that seals against a flat surface, so it suits sinks, baths and shower floors. A flange plunger has an extra rubber sleeve that folds out of the cup and sits in the toilet outlet. Use the flange type for toilets, and keep a separate plunger for the kitchen sink.
When a drain snake is better. Hair catches on the fittings inside a shower or basin drain, and a plunger will not pull it free. A drain snake goes down the pipe, hooks the hair and brings it back up. It also reaches further along the pipe than a plunger can.
We sell tools, not caustic chemicals. You will not find chemical drain cleaners here.
Drain cleaning brushes
A long flexible brush cleans the build-up you can reach: the plughole, the overflow slot and the first stretch of pipe. Check the length and the diameter on the product page before you order.
Floor trap covers and odour seals
A floor trap is the drain in the floor of a bathroom or kitchen. It holds a little water, and that water stops sewer air coming back into the room. When a floor trap is rarely used, the water can dry out and it starts to smell. Pouring a jug of water down it refills the trap.
A silicone cover lies flat over the floor trap. An odour seal insert sits inside it. People use both to help keep smells and insects from coming up between uses. Measure across the grating for a cover, and the inside of the outlet for an insert.
Shower grates and linear drains
For a grate, measure the length and width of the old grate and the size of the outlet underneath, then check the size and material on the product page. Lifting out a loose grate and dropping in one of the same size is simple. A grate that is fixed to the drain line is a different job, covered below.
Washing machine and dishwasher drain hoses
Measure the run from the back of the appliance to the existing outlet, following the path the hose will take, and allow some slack so the hose does not kink. Check the hose diameter and the end fittings against your appliance. Your appliance manual gives the longest drain hose the pump can handle, so read that before you buy an extension.
When to call a licensed plumber
Some problems are not a tool job. Call a licensed plumber if a blockage keeps coming back, if there is a sewage smell, or if several fixtures back up at the same time. Those are signs of a problem further down the line than a household tool can reach.
The same goes for anything that means cutting into, moving or connecting fixed pipework. In Singapore, fixed plumbing and sanitary work must be done by a licensed plumber.
Public sewers are PUB's responsibility. A blockage in a shared pipe or common area of an HDB block is usually for the Town Council, so check before you pay for private work.
Your drain buying checklist
Name the problem. Pick the category. Measure the inside of the drain opening, and the outside of the part you are replacing, in millimetres. Check the size, the material and the drain it fits on the product page. Sizes are the maker's stated sizes, often in inches, so convert before you compare. Then check the price, in Singapore dollars, and the delivery cost.
The short version
Measure first, buy the part that fits, and leave fixed plumbing to a licensed plumber. Every product page here lists size, material and fit so you can decide before you order, and you have 14 days from delivery to change your mind.