Vent & plumbing

Make a drain strainer that fits your own drain

This page generates a strainer for your own shower or sink drain and exports it as an STL. Choose a cap shape and body type, enter the pipe bore in millimetres, pick a hole pattern, and the model is recalculated in the browser.

Replacement chrome strainers vary by manufacturer, which is why the shop rarely has the one that fits. Here you set the cap diameter, skirt depth and rim band yourself, so the part covers the opening fully and keeps hair and grit out of the trap.

Open in editor See the sizes

Free, no sign-up. Change the sizes in millimetres and download the STL.

Ready-made variants

Each variant is the same template with different settings. Follow the link and the editor opens with those values.

Footed body, parallel slots

Body type: Footed · Cap shape: Circle · Pattern: Parallel lines +10
Open this variant: Footed body, parallel slots
Skirted body, venturi slots

Body type: Skirted · Cap shape: Circle · Pattern: Venturi +16
Open this variant: Skirted body, venturi slots
Basket body, round holes

Body type: Basket · Cap shape: Circle · Pattern: Round holes +8
Open this variant: Basket body, round holes
Square cap, honeycomb

Body type: Footed · Cap shape: Square · Pattern: Honeycomb +10
Open this variant: Square cap, honeycomb

Adjustable sizes

These values are edited in the editor's template panel. A number outside the range is clamped to the nearest limit automatically.

Size	Range	Default
Shape
Cap shape	Circle, Square	Circle
Body type	Footed, Skirted, Basket	Footed
Pattern	Spiral, Radial, Venturi, Round holes, Honeycomb, Square grid, Parallel lines, Bar grid	Parallel lines
Under flange *	45° cone, Flat	45° cone
Dimensions
Cap size	30–200 mm	70 mm
Plate thickness	1.2–8 mm	3 mm
Rim band *	1–15 mm	4 mm
Corner radius *	0–30 mm	4 mm
Pattern
Slot / hole size	1–10 mm	2.6 mm
Rib thickness	0.8–10 mm	2 mm
Slot count *	4–40	18
Twist angle *	0–80 °	30 °
Outward flare *	0–3	0.9
Bar angle *	0–90 °	0 °
Hub Ø	4–60 mm	13 mm
Side pattern
Side pattern *	None, Round, Honeycomb, Square, Vertical slots, Spiral (slanted slots)	None
Side opening *	2–20 mm	5 mm
Side rib *	0.8–10 mm	1.6 mm
Solid top/bottom band *	1–30 mm	2 mm
Slant (from vertical) *	0–45 °	30 °
Body
Skirt / basket Ø *	20–190 mm	60 mm
Skirt / basket height *	2–60 mm	8 mm
Wall thickness *	0.8–8 mm	2 mm
Feet *	0–8	4
Foot Ø *	1.5–10 mm	4 mm
Foot height *	0.5–40 mm	3.5 mm
Foot circle (%) *	25–95	92
Options
Center screw	On / Off	Off
Screw hole Ø *	1–12 mm	4 mm
Countersink Ø *	2–24 mm	8 mm
Countersink depth *	0–8 mm	1.6 mm
Rim chamfer	On / Off	On

Sizes marked with a star appear in the panel only when the related shape, style or option is active.

What it is used for

Hair catcher in a shower tray or floor gully
Food waste strainer in a kitchen sink
Replacement for a cracked chrome basin strainer
Guard over a washing machine discharge channel
Leaf and soil catcher in a balcony or terrace drain

Printing tips

Orientation: Footed and skirted bodies print cap-face down. The basket prints on its perforated floor with a 45° cone modelled under the flange.
Layer height: Use 0.16 mm. Hole edges and thin ribs come out noticeably cleaner at that height.
Infill: 25-30% infill with 3 perimeters, since people stand on the cap plate.
Supports: None needed. All three body types are built to come off the plate support free.
Material: Choose PETG. Shower water reaches 40-45 °C, where PLA slowly deforms, and PETG does not take up water. For direct food contact, stainless steel is still the better answer.

Tips

Make the cap 4-6 mm larger than the drain opening so the rim band sits on the porcelain.
Measure the bore while wet; limescale can narrow it by up to 1 mm.
Keep slots at 2-3 mm. Above 3 mm hair passes through, below 1.5 mm it clogs quickly.

Measuring the pipe bore correctly

Skirted and basket bodies create a neck that enters the pipe, and the number you need is the internal diameter of the drain opening, not the outside. Put the caliper jaws inside and measure twice at right angles, because old drains are rarely truly round.

Footed body: the most forgiving choice for odd or slippery openings
Skirted body: friction fits the mouth and traps hair along the skirt
Basket body: hangs into the pipe, adds volume, easy to empty

Pattern, hub and clogging

The hub is the solid disc left in the middle of the cap. It pushes the openings away from the centre so water flows both centrally and around the edge, and one hair clump cannot block everything. Around 13 mm works for most sizes.

Hair: parallel lines or venturi, 2-2.6 mm slots
Food waste: round holes, 3-3.4 mm
Leaves and coarse debris: honeycomb, 4 mm
Keep the rim chamfer on so the strainer is not a trip edge

Frequently asked questions

Should the strainer be a tight fit?

It only needs the rim band flat on the porcelain so water cannot bypass it; the skirt holds by friction. A very tight fit is hard to lift out when wet, so 0.3-0.5 mm clearance is more practical.

Is a 3D printed strainer hygienic?

The fine grooves between layers can hold biofilm. Lifting it out and brushing it weekly keeps that under control, but for constant kitchen food contact stainless steel is a better fit.

Can I make one for a square drain?

Yes. Set the cap shape to square and give it a corner radius. The square cap works with all three body types, not just the footed one.

Mine clogs too quickly. What should I change?

Increase the opening size by 0.4 mm or switch the pattern to round holes. A larger hub also helps, because it spreads the flow toward the cap edge.

Similar templates

Set the sizes to fit your part

Open the template in the editor, enter your values and download a print-ready STL. No account needed.

Open in editor

Ready-made variants

Footed body, parallel slots

Skirted body, venturi slots

Basket body, round holes

Square cap, honeycomb