Dymax Stainless Steel Lily Pipe Set, 12/16mm

Surgical-Grade Stainless Steel Lily Pipe Set for Planted Tank Canister Filters

The Dymax Stainless Steel Lily Pipe Set (12/16mm) is a matched inflow and outflow pipe set for external canister filters running 12mm inner diameter / 16mm outer diameter tubing. It replaces standard plastic inflow and outflow fittings with a surgical-grade stainless steel alternative that resists rust, surface scratches, calcium buildup, and the chemical stress of both acidic and alkaline water — conditions that plastic fittings and glass lily pipes are more vulnerable to over time.

The outflow lily pipe features the flared, curved bell shape that defines the lily pipe design. When positioned just at or slightly below the water surface, the outflow creates a circular surface current that promotes gas exchange, helps distribute CO2 throughout the water column, and provides the gentle, even surface agitation that planted tanks need without excessive turbulence that would drive CO2 out of solution too quickly. The inflow pipe draws water from the lower part of the aquarium into the canister filter for mechanical and biological processing. The set includes hose clips for a secure, vibration-free connection at both ends.

Key Features:

• Surgical-grade stainless steel outflow and inflow lily pipe set for canister-filtered planted aquariums
• Sized for 12mm ID / 16mm OD canister filter tubing — the standard for smaller and mid-range canister filters
• Outflow lily pipe creates a circular surface current for gas exchange and even CO2 distribution
• Resistant to rust, scratches, calcium buildup, acidic water, and alkaline water
• Durable alternative to glass lily pipes without the fragility risk of breakage during maintenance or cleaning
• Includes outflow lily pipe, inflow lily pipe, and hose clips
• Clean, minimal aesthetic suited to Nature Aquarium and Dutch-style aquascape builds

Ideal For:

• Nature Aquarium and planted tank builds using a smaller external canister filter with 12mm ID / 16mm OD tubing, replacing plastic fittings with a premium stainless steel set
• Aquascapers building a clean, minimal-hardware aesthetic in a nano or small-to-mid-size planted tank who want the slim profile and material quality of stainless steel without the fragility of glass
• Pet stores stocking the 12/16mm as the standard canister filter accessory for freshwater planted tank customers upgrading their inflow and outflow fittings

Pro Tips:

• Position the outflow just at or slightly below the water surface. The lily pipe outflow works best when the flared bell sits close to the waterline — deep enough that the surface is not broken with splashing (which drives CO2 out of the tank) but shallow enough to create a visible circular surface ripple. A few millimeters of adjustment makes a meaningful difference in both CO2 retention and surface agitation quality.
• Measure your existing hose outer diameter before ordering. The 12/16mm refers to the hose this set connects to: 12mm inner diameter, 16mm outer diameter. If you are unsure of your canister filter's hose size, measure the OD of the existing hose with calipers — the outer diameter is the number that must match the fitting.
• Clean calcium deposits with dilute citric acid, not bleach. Stainless steel lily pipes can develop calcium deposits in hard water over time. A brief soak in a solution of citric acid and water dissolves the deposits without damaging the steel surface. Avoid bleach on prolonged contact with stainless steel as it can cause surface pitting.

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