
40 to 50 mm Sewer Adapters: 3D Models and STL Files
This collection gathers 3D models that bridge a 40 mm line to a 50 mm one: pipe reducers, fan adapters, hose and vacuum fittings, and mounting parts. It is useful when an off-the-shelf part does not match the diameters you already have, and a printed STL part can close the gap. The models come from several platforms, so the same idea appears in different shapes and wall thicknesses. Polyzon does not confirm whether models are free, their price, license, official status, affiliation, safety or fitness. Check the current terms at the source.
How this collection is put together
Polyzon assembles this collection from search results on the connected platforms. Repeats and models without a preview are removed, weak matches go to the end, and the rest keeps the search order. Models belong to their authors — check the terms on each model's page.
Selection rules: the Polyzon editorial team · Text updated 2026-10-13
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All models in this collection

40mm Axial to 50mm Centrifugal Fan Adapter

Parametric Universal Pipe Adapter / Reducer

Sewer Entrance Marker (28mm/32mm scale)

40mm Axial to 50mm Blower Adapter

Adaptateur piscine G2 vers PVC rigide Ø40 mm

20 to 59.5mm Adapters CAMLOCK Hose for Ridgid 1 7/8"

40mm to 50mm fan adapter

adaptateur 40mm

100 mm to dual 50 mm

Bosch GCM to DN 40 Adapter

Kugelhahn Adapter 50mm oder 38mm Schlauch

60 to 80mm Adaptors CAMLOCK Hose for Ridgid 1 7/8"

60mm to 50mm fan adapter

Adapter / Connecting HT50 / HT40 auf DN38

🔵🔲 Vacuum Adapter: 44 - 40 mm Ø → 28 mm ◼️

30mm to 50mm Fan Adapter

40mm to 32 mm Pipe Reducer / Adapter

19mm female to 21mm male

Adapter 30mm opening to 40mm fan

pipe 40mm to DN50

Spool adapter 65-75mm to 50mm

Ender 2 - CR-10 Fan Adapter from 40 to 50mm

Simple 40mm Pipe/Tube Connector

45mm to 37mm Shop Vac Adapter

Adapter 1/2 square to 1/4 hex bit 50mm

Adapter gardena fitting 50mm pipe

Sewer Entrance Marker (variant) (28mm/32mm scale)

50mm Radial (centrifugal) to 40mm Axial Fan Adapter

Raccord réducteur tube PVC Diamètre ext 40mm

1 1/2" PVC to soft corrugated hose ~40mm

Vacuum adapter - 50mm to 32mm hose

Adattatore tubo aspirapolvere Parkside-tubo 40

Adapter 1.75 inch to 2.5 inch

BIQU H2 40 to 35mm fan adapter

Washbasin Drain Reducer, 45ID to 40ID

Movable Adapter for Oase 200/250/350/600/850 and all 16mm Ex

Fan 40mm to 60mm

Adapter Absaugung Aussen 91 und 50mm

50mm Centrifugal to 30mm Axial Adapter

40mm to 50mm Tabletop Gaming Base Convertor

faucet tap adapter reduction 20mm to 22mm
Сylindrical container from a sewer pipe (40/50mm)

42.5mm to 40mm Bath/Shower drain adapter

Intext to 1.5" male adapter

CAMLOCK adapters for 32-75mm Hoses (Ridgid 1 7/8"hose )
«40 to 50 mm Sewer Adapters: 3D Models and STL Files»
The most common group is the straight reducer, a short cone or stepped tube that takes a 40 mm pipe or socket on one side and a 50 mm one on the other. Fan and blower adapters follow the same logic but are shaped around a round or square housing, often with a flange and screw holes. Hose, vacuum and pool fittings add threads or barbs, while brackets and supports hold the pipe itself rather than connect two ends.
Before printing, open the author's model page and read the dimensions: inner and outer diameter, socket depth, wall thickness and overall length. Check how many parts the model has and whether they are meant to be glued, screwed or pushed together, and whether the geometry needs supports. The material and settings the author lists matter here, since a thin-walled adapter behaves differently from a thick one, and photos of real prints show how the part actually fits.
If the first search gives few results, try synonyms such as reducer, transition, coupler, socket or sleeve, and add the nominal diameters in both directions. Related topics are worth a look too: dust extraction fittings, fan shrouds, hose adapters and pipe brackets often use the same connection standards. Combining a diameter with a use case, for example a drain or a workshop hose, usually narrows the list faster than a single keyword.
Scale and standard differ between regions, so two models with the same numbers in the title may not interchange. Measure the pipe you have with calipers, including the socket, and compare it with the drawing or dimensions given on the model page. Where the author provides a parametric file, you can adjust the diameters yourself instead of searching for another model.
Frequently asked questions
What is the difference between a 40 mm to 50 mm adapter and a reducer?
How do I know which diameter to measure?
Do these adapters need supports when printed?
Can I change the diameters in the model?
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