3D Printed Check Valve for 3/8 Inch Hose

Design preview. Rendered from the file, not a photo.

The maker says it fits: 3/8" hose. See the proof

This model is not currently offered as a verified ready to buy print.

Already have the file?

Upload it and we'll quote your print.

Upload your file

Looking for something like this?

Ask the Solution Counter.

Ask the Solution Counter

What it does

One-way design lets water flow in one direction only, so your pump system works without backflow
Fits 3/8 inch hose connections, so you can build custom water transfer setups that match your needs
Use two valves with a squeeze bulb to move water from bilge to bucket, so cleanup takes minutes instead of hours
Printed on demand for you, so you get a fresh part made exactly when you order

You need a simple way to move water where you want it to go without it flowing backward. This check valve does exactly that. It's designed for 3/8 inch hose and lets fluid travel one way only.

The valve works great in pairs. Connect two of them with a squeeze bulb and you have a portable pump system that moves water from tight spaces like boat bilges into a bucket. The simple one-way design means no moving parts to jam or break.

Your valve prints fresh when you order it from the USA, ready to fit right into your workshop setup or boat maintenance kit.

7.4k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What it fits

The maker says it fits: 3/8" hose

That is the maker's word, not a fit we measured. Check the size below against your own.

3/8" hoseFrom the maker's own listing notes, checked 2026-08-13. See the original post

What you get

This design prints as one piece.
Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PETG. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.