Description
Aqua Medic Outlet/overflow Strainer 25mm / L = 160mm — Slotted ABS strainer guarding 25 mm drain lines on larger overflows
As a system grows, so does its drain, and a 25 mm line carries more water, and more of whatever floats into it, than the 20 mm pipe on a smaller tank. Aqua Medic Outlet/overflow Strainer 25mm / L = 160mm (SKU: AM41825) is Aqua Medic’s outlet strainer for the 25 mm pipe size, a slotted ABS tube approximately 160 mm long, listed as item 418.25. It protects the drain from coarse dirt: snails, small fish, pieces of algae and loose detritus are held at the slots while the water carries on to the sump. The wider bore suits overflows that already run 25 mm pipework to the filter.
Aqua Medic builds the strainers in its metric pipe sizes, 20, 25, 32, 40, 50 and 63 mm on the outside diameter; this is the 25 mm model, which sits one step above the two 20 mm versions. Its outside diameter equals that of 25 mm pipe, so it fits directly into a 25 mm bulkhead or fitting, and a 25 mm socket is needed where it joins a length of PVC pipe. Stepping the line down to a smaller pipe further along reduces the drain’s capacity, so it is best kept at 25 mm all the way. Like the rest of the range it lifts out for cleaning, and a brush under running water clears the slots when growth or debris starts to restrict flow. ABS is unaffected by salt, so it serves marine and freshwater systems equally.
Usage & Application
When to Use
- 25 mm drains: Covering the drain bulkhead in an overflow plumbed in 25 mm pipe.
- Higher-flow systems: Larger tanks with a bigger drain line to the sump.
- Livestock safety: Keeping snails, shrimp and small fish out of the plumbing.
- Debris control: Stopping algae and detritus before they reach pipes and filter socks.
Installation & Replacement Guide
- Confirm the size: Check the fitting is for 25 mm outside-diameter pipe.
- Fit it: Push the strainer firmly into the 25 mm bulkhead or fitting.
- Use a socket: Connect to PVC pipe through a 25 mm socket.
- Service it: Pull out and brush the slots clean at water-change time.
Product Specifications & Highlights
Key Features
- 25 mm diameter: Sized for larger drain lines.
- 160 mm long: A generous slotted area for the flow.
- ABS construction: Rigid, light and corrosion-free.
- Direct fit: Goes straight into 25 mm bulkheads and fittings.
- Removable for cleaning: Lifts out of the fitting for brushing.
Product Details
- Brand: Aqua Medic (Germany)
- SKU: AM41825
- Barcode (GTIN/EAN): 4025901107197
- Product Type: Accessories > Overflow Strainer
- Manufacturer Item: 418.25
- Pipe Size: 25 mm (outside diameter)
- Length: Approx. 160 mm
- Material: ABS
- Connection: Into a 25 mm bulkhead or fitting; socket required to join PVC pipe
- Other Sizes: 20 mm / 160 mm (AM41820); 20 mm / 82 mm (AM41821)
- Target Environment: Marine and freshwater aquariums with overflows and sumps


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