Auckland custom septic tank fabricated for a client on Great Barrier Island. Standard single chamber septic tank with solids filter, inlet, outlet, vent, manhole on 100mm riser. Custom fabricated to replace an old failed fiberglass tank. Easy to install, lightweight, UV resistant, fabricated from 12mm HMWPE silver, extrusion welded and pressure tested. Hauraki Gulf Septic tanks and Great Barrier Island Septic Tanks fabricated in West Auckland.