Choosing the right stainless steel pipe size for your canister filter is one of the most common questions we get at LitiAquaria. Get it wrong, and you may end up with leaks, poor flow, or pipes that simply won’t fit.
This guide covers the most popular canister filter brands and models, so you can choose the correct pipe size with confidence.
Why Pipe Size Matters
Canister filters use different hose diameters depending on their flow rate and design. Stainless steel inflow and outflow pipes must match your filter’s hose size exactly.
Even a small mismatch can cause:
- Loose connections
- Water leaks
- Reduced flow performance
The good news? Once you know your filter model, choosing the right size is straightforward.
Quick Reference: Filter Model to Pipe Size
9mm Stainless Steel Jet Pipes
Best for nano and small filters with 9mm hose connections.
Compatible with:
- OASE FiltoSmart 60 / FiltoSmart Thermo 60
- Eheim Classic 150 (2211) — use a 12/9mm reducer connector on the inlet hose
Ideal for aquariums under 30 litres where a compact and elegant pipe setup is preferred.
Shop 9mm Stainless Steel Jet Pipes →
12mm Stainless Steel Jet Pipes
The most versatile size, suitable for a wide range of mid-sized canister filters.
Compatible with:
- OASE FiltoSmart 100 / FiltoSmart Thermo 100
- Eheim Ecco Pro: 130 (2032), 200 (2034), 300 (2036)
- Eheim Classic: 250 (2213), 350 (2215)
- Eheim eXperience: 150 (2422), 250 (2424)
Shop 12mm Stainless Steel Jet Pipes →
16mm Stainless Steel Jet Pipes
Designed for larger filters with higher flow rates.
Compatible with:
- OASE FiltoSmart 200 / FiltoSmart Thermo 200
- OASE BioMaster 250, 350, 600, 850
- Eheim Professional 3: 350 (2073), 600 (2075), 1200XL (2080)
- Eheim Professional 3e: 450 (2076), 700 (2078)
- Eheim Professional 4+: 250 (2271), 350 (2273), 600 (2275)
- Eheim Professional 5e: 350, 450, 600, 700
- Eheim eXperience 350 (2426)
Shop 16mm Stainless Steel Jet Pipes →
19mm Stainless Steel Jet Pipes
For high-flow filters used in large aquariums.
Compatible with:
- Aquael Ultramax 2000
- Aquael Hypermax 4500
Shop 19mm Stainless Steel Jet Pipes →
How to Measure Your Hose Diameter
If your filter model isn’t listed above, you can easily check:
- Look at your filter hose — you need the inner diameter (ID).
- Check your filter manual or manufacturer’s website.
- Measure the inlet / outlet nozzle using a ruler or caliper.
Inflow & Outflow Sets vs Individual Pipes
LitiAquaria stainless steel pipes are available as individual inflow or outflow pipes, as well as complete In/Out Sets.
If you're setting up a new aquarium, the stainless steel In/Out Pipe Set is the easiest way to achieve a clean and consistent look.
Still Not Sure?
Just drop us a message on Instagram @litiaquaria with your filter model — we’ll help you confirm the correct size. 😊
We want every LitiAquaria pipe to fit perfectly.