Meeting the needs of four to five bedroom homes, Reln's 4000L Septic Tanks are ideal for large households.  The tanks are fitted with RELN's innovative reinforced structural brace ring and come complete with a strong, structural two piece baffle that clips and screws into place to create two separate chambers, in accordance with authority requirements.

 Australian Standards Approved - AS/NZS1546.1:2008 On-site domestic wastewater treatment units –Septic tanks Lic SMK1651. Easy to Transport – Lightweight and easy to manage without a crane. Riser kits are packed and stored inside the tank for delivery. Strength by Design – RELN tanks feature a unique stepped ribbing for added strength. Anti Crush - Fitted with an innovative reinforced polypropylene structural brace ring that adds even greater rigidity to prevent crushing when installed deep in the ground. Built in locking alignment prevents incorrect fitting of lid to base. Complete Kit – RELN Septic Tanks are supplied as a complete kit including inlet and outlet T-Junctions. 15 Year Warranty.