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EziPit®

The Iplex EziPit® 425 (MS), EziPit® 600 (MC) and EziPit® 1000 (MH) offer significant benefits in sewer construction and flexibility in sewer networks. The environmental, technical and economical demands of water authorities for a water-tight, corrosion proof, stable and durable sewer system are now a reality with the Iplex EziPit® systems. 

Contact us today to discuss how the EziPit® sewer pit range will benefit your next sewer maintenance project. 

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Applications

Applications

The EziPit® is a polypropylene inspection and maintenance structure (Maintenance Shaft, Maintenance Chamber or Maintenance Hole) designed for buried gravity sewer applications. This easy-to-install sewer pit system complements our plastic pipeline systems and is designed with practical inspection shafts and maintenance holes for easy surveying and upkeep. It consists of a base, a single wall corrugated riser, a reducing cone for maintenance holes and a range of covers designed for trafficable and non-trafficable areas. The design allows safe access to the sewer from the surface.

Sewer Access Shafts, Chambers and Maintenance Holes are used (where practicable) at every:

  • Change of alignment
  • Junction
  • Change in the size of a sewer

In addition, the sewer pits are used at specified intervals for inspection and maintenance. National Sewer Standards and Codes specify requirements for the location and spacing of Inspection Shafts and Sewer Access Chambers.

Contact us today to find out more about how sewer pits and related systems from the EziPit® range will benefit your next sewer maintenance project. 

EziPit® Product Catalogue and Technical Guide

Advantages

The benefits of polypropylene in gravity sewer pits or sewerage systems include high resistance to sulphuric acid erosion, low specific weight and high modulus, producing a stiff lightweight structure and resistance to abrasion and resistance to surface wear.

The overall benefits of the EziPit® system include:

Features Benefits
Flexibility The base includes adjustable pipe sockets which allow the pipe grade or angle to be adjusted up to 7.5o in any direction in the trench.
Long Service Life Polypropylene base and drainage riser for chemical resistance in sewer environments.
Robust & Flexible Riser Flexible corrugated sewer riser accommodates ground movement and dynamic traffic loads without cracking or breaking. The riser is easily cut on-site for height adjustment.
In-ground Performance Fully resistant to external loads up to a depth of 6 metres and water tight up to 5 metres.
Ease of Installation Light-weight modular components for ease of handling in deep trenching.
Safety Performance Can be assembled and backfilled at the same time as the sewer pipe, reducing costs in plant, labour and the risks associated with open excavation.

Material Options

Material Options

Material Properties

Polypropylene Property Value & Unit
Density of Pipe Compound 900 kg/m³
EziPit® 425 Riser - Ring Bending Stiffness 4000 N/m/m
EziPit® 600 Riser - Ring Bending Stiffness 8000 N/m/m
EziPit® 1000 Riser - Ring Bending Stiffness  4000 N/m/m
Flexural Yield Stress 24.5 MPa
Tensile Yield Stress (50mm/min) 28 MPa
Tensile Yield Strain (50mm/min) 6%
Poisson’s Ratio 0.45
Thermal Co-efficient of Linear Expansion 150 x 10-6 / K

Note: These are typical values, which can be used for buried flexible design purposes. Actual values may vary slightly for different sources of polymer.

Product Details

Product Details

Standards and Approvals

All components of the EziPit® range, including sewer pits, inspection shaft covers, drainage risers, and maintenance holes comply with the following Standards:

  • WSA 137 Industry standard for Un-plasticised Polyvinyl Chloride (PVC-U), Polypropylene (PP) and Polyethylene (PE) maintenance shafts, maintenance chambers and maintenance holes for sewerage.
  • I.S.EN 13598-2 'Plastics Piping Systems for Non-pressure Underground Drainage and Sewerage – Unplasticised Poly (Vinyl Chloride) (PVC-U), Polypropylene (PP) and Polyethylene (PE) - Part 2: Specifications for Manholes and Inspection Chambers'.
  • ISO 13272 ‘Plastics Piping Systems for Non-pressure Underground Drainage and Sewerage – Unplasticised Poly (Vinyl Chloride) (PVC-U), Polypropylene (PP), Polypropylene with Mineral Modifiers (PP-MD) and Polyethylene (PE) - Part 2: Specifications for Manholes and Inspection Chambers in Traffic Areas and Deep Underground Installations.
  • EN14396 'Fixed Ladders for Manholes'.
  • AS/NZS 5065 ‘Polyethylene and Polypropylene Pipes and Fittings for Drainage and Sewerage Applications’.
  • AS 3996 ‘Access Covers and Grates’.
  • AS 1646 ‘Elastomeric Seals for Waterworks Purposes’.

These Standards specify the material, performance and design requirements for plastic sewer maintenance Shafts and Chambers, ensuring adequate resistance to site loadings and durability in operation. The structural strength of the EziPit® sewer pit is sufficient to deal with 6m depth of cover and tightness is ensured to withstand a pressure of 0.5 Bar vacuum or 5m water column.

The following Product Specifications are also relevant:

  • WSA PS-315 Fixed Ladders for Man Entry Structures - Water Supply and Sewerage
  • WSA PS-337 Maintenance Chambers (MC) – Polypropylene (PP) for Non-Pressure Applications – Gravity Sewerage
  • WSA PS-341 Maintenance Shafts (MS) - Polypropylene (PP) for Non-Pressure Applications – Gravity Sewerage
  • WSA PS-340 Maintenance Holes (MH) - Polypropylene (PP) for Non-Pressure Applications – Sewerage
  • WSA PS–290 Access Covers and Frames for Water Supply and Sewerage to WSA 132
  • WSA PS–240 Polypropylene (PP), Ribbed Construction
  • WSA PS-230 Polyvinylchloride, Unplasticised (PVC-U) Pipes and Fittings for Non-Pressure Applications - Sewerage and Drainage. 

EziPit® maintenance chamber and shaft components are manufactured under a third-party certified Quality Management System (QMS) complying with AS/NZS ISO 9001 and have ISO Type 5 product certification.

The EziPit® has been appraised by WSAA and the product appraisal report No 09/01 Issue 4, ‘EziPit® Polypropylene (PP) Inspection and Maintenance Chambers and Shafts’ was published on the 22nd September 2017.


Iplex EZIpit® WSSA Appraisal PA 0901 Issue 4

EziPit® 425 Sewer Maintenance Shaft

DN425 polypropylene base The DN425 Polypropylene Base is available with adjustable rubber ring joint sockets compatible with smooth wall DWV PVC-U pipes manufactured to AS/NZS 1260.

The pre-benched EziPit® 425 bases are available with 6 different flow profiles allowing changes in direction and side inflow connections.

The standard profiles are 30°, 60°, 90°, straight through (180°) and double sweep junction profile for DN150 DWV pipe and straight through (180°) profile for DN225.
DN425 polypropylene corrugated riser The DN425 Corrugated Riser is available in 2m, 3m and 6m lengths, it can be cut on-site to adjust the height of the shaft. The DN425 Corrugated Riser is orange/brown in colour
SBR (styrene-Butadiene Rubber) seals SBR seals are used for a high-performance leak-tight unit
Cover arrangements Cover arrangements suitable for both trafficable conditions (Class D) and non-trafficable conditions (Class B) are available for different installation requirements (Cap and Lid arrangement or 'Top Hat' Frame)
Riser inflow connection Riser inflow connection consists of a moulded polypropylene Riser Junction with spigot off-take.

A standard PVC DWV RRJ coupling and level invert taper (LIT) provides an effective joint with the PP spigot off-take.

Iplex EZIpit® 425 Sewer Maintenance Shaft MS Product Overview

EziPit® 600 Sewer Maintenance Chamber

DN600 polypropylene base DN600 polypropylene base with adjustable rubber ring joint sockets compatible with smooth wall DWV PVC-U pipes manufactured to AS/NZS 1260. The pre-benched EZIpit® 600 bases are available with 6 different flow profiles allowing a change in direction and side inflow connections. The standard profiles are 30°, 60°, 90°, straight through (180°) and double sweep junction profile for DN150, DN225, DN300* DWV pipe (*subject to availability).
DN600 polypropylene corrugated riser DN600 polypropylene corrugated riser is available in a range of lengths to accommodate installation depths up to 6m. The DN600 riser is light grey in colour.
SBR (Styrene-Butadiene Rubber) seals SBR seals are used for a high-performance leak-tight unit
Cover arrangements Cover arrangements suitable for both trafficable conditions (Class D) and non-trafficable conditions (Class B) are available for different installation requirements (Cap and Lid arrangement or 'Top Hat' Frame)
Riser inflow connection Riser inflow connection consists of a prefabricated Riser Junction with spigot off-take. A standard PVC DWV RRJ coupling and level invert taper (LIT) provides an effective joint with the PP spigot off-take.

Iplex EZIpit® 600 Sewer Maintencance Chamber MC Product Overview

EziPit® 1000 Sewer Maintenance Hole

DN1000 Polypropylene Base  DN1000 polypropylene base with adjustable rubber ring joint sockets compatible with smooth wall DWV PVC-U pipes manufactured to AS/NZS 1260. The pre-benched EziPit® 1000 bases are available with 6 different flow profiles allowing a change in direction and side inflow connections. The standard profiles are 30°, 60°, 90°, straight through (180°) and double sweep junction profile for DN150, DN225, DN300* DWV pipe (*subject to availability).
DN1000 Polypropylene Corrugated Riser The DN1000 Riser is available in 1.2m, 2.4m, 3.6m and 6m with plain ends which can be cut off to adjust the height of the shaft. The DN1000 corrugated riser is orange/brown in colour.
SBR (Styrene-Butadiene Rubber) Seals SBR seals are used for a high-performance leak-tight unit.
Cover Arrangements Cover arrangements suitable for both trafficable conditions (Class D) and non-trafficable conditions (Class B) are available for different installation requirements (Cap and Lid arrangement or 'Top Hat' Frame).
Riser Inflow Connection
  • PP corrugated riser prefabricated with DN225 (250mm OD) or DN150 (160mm OD) PP spigot in-take branch suitable for either internal or external drops or property connections. 
  • For DN100 DWV (110mm OD) connection add a PVC DWV Level Invert Taper (LIT) M&F with a DWV PVC Coupling (F&F).
Cone DN1000 X DN600 Reducing Cone. Black polypropylene with grey corrugated riser.

Iplex EZIpit® 1000 Sewer Maintenance Hole (MH) Product Overview

Design

Handling & Storage

Installation & Testing

FAQ

Frequently Asked Questions

How deep can you bury the EziPit® sewer pit system?

The EziPit® can be buried to a maximum installation depth of 6m and a minimum depth of 1m depending on the structure used.

Why is the shaft corrugated?

The sewer pit's corrugated shaft provides further flexibility and as a result can deflect and absorb dynamic traffic loads without cracking.

Can the EziPit® be installed in a roadway?

Yes. The EziPit® is designed to resist loading and can be supplied with a Class D cover arrangement, which complies with AS 3996.

Will the EziPit® resist flotation when buried in water charged ground?

Yes, the corrugated wall will key into the compacted embedment material resisting any up thrust. Tests in the field have been successfully conducted, confirming the unit doesn’t float.

Can you use SewerMax® pipe with the EziPit®?

Yes, but only in DN225 and DN300. SewerMax® spigot x socket pipe adaptors allow direct connection of SewerMax® pipe with the EziPit® base.

Can the EziPit® be supplied with an internal or external drop structure?

Yes. The EziPit® shaft can be supplied with a polypropylene spigot welded into the side of the shaft allowing connection to PVC DWV Sewer Pipe. The welded spigot ensures a watertight connection.

Are the EziPit® frames and covers gas tight?

Yes, the frames and inspection shaft covers are both gas and watertight and comply with AS 3996.

Why does the EziPit® system have a cap and lid?

The cap and lid was designed to prevent personnel entry.

Can you install an access ladder in the shaft?

No, The EziPit® is a sewer inspection and maintenance chamber and not a manhole. Therefore it has been designed to prevent personnel entry into the confined space. The cap and shaft do allow inspection with CCTV and blockage clearance with water jets.

Do I need a crane to install the EziPit®?

No. The EziPit® is made up of lightweight components designed for ease of handling during installation.

Is the EziPit® suitable for stormwater applications?

Yes, the EziPit® is suitable for storm-water drainage applications provided the minimum cover is not less than 1.2m’s to invert.

Yes, The shaft is one continuous length with no joints eliminating any potential points for root intrusion.

The rubber ring joint connecting the shaft to the base of the sewer pit is also resistant to root intrusion and complies with AS/NZS 1260 and AS/NZS 5065 with respect to joint performance.

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