Promax Septic Tank 4000L

These ‘Single Stage’ Filtered Promax Septic Tanks are manufactured from polyethylene to meet the AS/NZS:1546 Standard for Septic Tanks.

Designed by geotechnical experts this heavy-duty ribbed tank has been designed and fully tested to withstand ground and water pressure at depth and is completely internally plumbed up to the outlets.

  • Very strong heavy-duty one-piece ribbed construction
  • Lightweight means savings on transport and installation costs
  • Polyethylene will not corrode or rot
  • Includes Taylex Outlet Filter
  • Easy to install using 100mm inlet & outlet

Click here for Local NZ Councils Bylaws on Water Disposal Systems

$3,816.00 (incl. GST)

Code Description Capacity(L) Diameter(mm) Length(mm) Manhole Dia(mm) Outlets(mm)
PMXUT04000ST Promax Septic Tank 4000L 4000 1280 4000 600 1x100

Most councils require an engineer report on soil conditions, this report will also recommend the type of system that is required for your site.  You can find more information about Regional requirements on our helpful links page. 

Yes! Promax Underground tanks are vehicular traffic approved.  

We recommend using a registered plumber or drainlayer to install your water tanks. Visit our recommended installers page to find one in your area. If you wish to install yourself, we recommend you follow the guidelines provided in the following resources: