Parametric Drain Strainer and Hair Catcher for Sinks, Tubs and Showers (Customizer: basket or cover)

A strainer you size to your own drain.

- Basket: drops into the drain opening and rests on the rim with a sloped flange. Holes in the floor and slots in the side let water through, and a centre post lets you lift it out to empty it.

- Cover: a flat perforated disc that lies over a drain, with an optional cross-shaped stem underneath that reaches into the drain to catch hair.

Measure the inside diameter of the drain opening (basket) or the area you want to cover (cover), enter it and print. Hole size, hole spacing, slot width, depth and wall thickness are all in the OpenSCAD Customizer.

Includes 4 ready-to-print versions: an 80 mm and a 38 mm basket, a 110 mm cover and a 45 mm hair catcher with stem.

Please read. Print it in PETG for wet use. It is not a food-contact item and makes no food-safety claim. Empty and rinse it often, and remove it if water drains too slowly.

NOTES AND LIMITS

- Not a food-contact item and no food-safety claim: 3D prints have small gaps that can hold residue. Rinse and replace it often.

- Use PETG; PLA is not recommended for hot water.

- Measure your drain; drain openings vary, and the basket needs a rim or ledge to rest on.

- Small holes catch more but drain slower; tune hole_d for your use.

- Don't use it where it could block an overflow or an appliance drain.

- Independently designed; not affiliated with or endorsed by any maker of the furniture, fixtures or hardware it is used with.

- Previews are computer renders of the included STL files, not photos of real prints. Each image is labelled "Rendered preview".

PRINT SETTINGS

- Material: PETG for wet use (as designed). PLA can soften with hot water and is not recommended here.

- Layer height 0.2 mm; 3 perimeters/walls; 20-30% infill

- Supports: none (the wall slots have 45 degree pointed tops and the flange is a 45 degree slope)

- Orientation: as exported (basket upright; cover flat with the stem pointing up)

- Bed size: the largest preset is 110 x 110 mm, so every preset fits a 180 x 180 mm bed

- Measure your drain first; print the basket with clearance 1 mm per side and adjust if it sits too loose or tight.

HOW TO CUSTOMIZE: install the free OpenSCAD (openscad.org), open the .scad, choose Window > Customizer, change the values, then press F6 (Render) and Export STL.

Designed with AI assistance: an AI assistant wrote the OpenSCAD code, presets and description under my direction. The files were checked automatically (watertight, correct size, prints without supports) but have not yet been test-printed. Preview images are computer renders of the STL files.

Licence: Creative Commons Attribution 4.0 International (CC BY 4.0). You may print, remix, share and sell prints and remixes, including commercially, as long as you give attribution (credit Doyle Pounders / Print File Foundry and link to this design).