NATURALFLOW SERIES NF1500
System Specification & Installation Instructions
If in doubt contact the experts on 0800 628 356 or [email protected]
New Zealand’s Leaders in Eco-Sustainable, Odourless Wastewater and Sewage Systems
Wormorator® & Dose Chamber Specifications
Tanks are made of Cotene 9050 which is a linear medium density polyethylene, designed specifically for
rotational molding of large tanks and products that require a high level of rigidity. It contains a fully formulated
long term UV stabilization package (with a minimum UV8 rating) and is suitable material for wastewater
treatment containment meeting all the requirements of Section 4.3.3 of AS/NZS 1547:2012 which cross
references the structural performance requirements of its section 2.4.2.3 back to the relevant provisions of
AS/NZS 1546.1, which for plastic septic tanks constructed via by rotational molding using thermoplastics
(polyethylene) are set out in Section 9 of that Standard. These tanks have an expected lifespan of 50 years.
SXL5000 Wormorator® Module
1000ltrs Nominal capacity
1200mm Diameter
1400 mm O/A height
Dose Chamber
1500ltrs Nominal capacity
1200mm Diameter over main body
732mm Riser Diameter
2125mm O/A height
Installation Location and Certification
These tanks are not designed for vehicle loads and shall be located no closer than 1.50m to a driveway, road
frontage or a building. If for any reason the tank is located where vehicle traffic may drive over the tank or
approach closer than 1.50m, or where it may be trampled on by farm stock then the tank should be protected
by a concrete slab designed to support these loads. Surface water must also be diverted from flowing into the
installation.
Installation must be certified to AS/NZS 1547:2012, the certificate to be issued and held by the regulatory
authority.
High Water Table Installations
All tanks have been engineered and designed with support ribbing for maximum strength, in accordance with
the NZC 3604. Clauses B1 and B2 for structure and durability, to withstand any hydraulic pressures, both lateral
and uplift, created by high water table conditions, even when the tanks are completely empty at install stage.
As per the NaturalFlow Systems installation instructions, in these conditions, tanks must be anchored in with
concrete around base, as per the installation instructions, to height as specified.
Plumbing Pipes and Fittings
All internal plumbing is done with PVC pipes with appropriate connections according to AS/NZS 1260 and
AS/NZS 4130.
Backfill and Bedding
Place and bed to NZBC G13/AS2, using compacted granular metal, in layers not exceeding 100mm.
