The Polylok PL-68 Effluent Filter Cartridge is a high-performance septic tank outlet filter designed to improve the efficiency and lifespan of your domestic wastewater treatment system. Suitable for use with any 4-inch outlet septic tank filter, it offers simple installation and exceptional filtration performance for homes, small businesses, and rural properties across Ireland, the UK, and Europe.
If your system includes a T-Piece assembly, simply push-fit the cartridge into place — no tools required. The PL-68 Effluent Filter Cartridge reduces the amount of solids leaving the septic tank, helping to prevent clogging, extend the life of your percolation area or drainage field, and protect local groundwater from contamination.
Call +353 5986 31524 or email [email protected] for pricing and availability today!
Compatible with any 4″ outlet septic tank filter
Push-fit installation for quick, secure fitting to a T-Piece assembly
Reduces suspended solids and protects your soakaway or drainage field
Improves system performance and prevents sewage backflow or pooling in gardens
Ideal for flows up to 3,000 litres per day – perfect for most residential applications
Durable, long-life materials ensure low maintenance and dependable operation
With decades of expertise in wastewater management, Polylok EU provides reliable filtration solutions trusted throughout Ireland and Europe.
If your outlet pipe does not include a T-Piece assembly, you can purchase the PL-68 filter with a housing kit directly from Polylok. The housing unit can also serve as an inlet baffle, adding extra versatility for new or upgraded septic installations. Click here for more details on this complete solution.
Protect your wastewater system — and the environment — with the Polylok PL-68 Effluent Filter Cartridge.

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