www.everhard.com.au | National Customer Service Number 13 1926

EVERHARD INDUSTRIES Pty Ltd is a leading manufacturer of products for waste water treatment and control, with many years of experience in the production and improvement of Grease and Silt Traps and Arrestors. The wide range of proven designs offers

types suitable for most normal applications in domestic, commercial and industrial applications.The EVERHARD Operation and Maintenance Manual will assist selection of the most suitable EVERHARD product.

The Roto-moulded 1000 litre Arrestor body is made without seams or welded joints in a single piece. The specially selected blend of polyethylene and additives offers excellent resistance to chemical attack from contaminants present in most commercial waste-water. This provides an effective, durable alternative to conventional Arrestor types for above-ground applications, while its’ light

weight makes it easy to transport and handle for installation in-ground.Please read this manual carefully to ensure the Arrestor is correctly installed for the best possible performance.

Step by step instructions help make the installation a simple and safe operation.

EVERHARD INDUSTRIES Pty Ltd1000L Polymer GREASE and SILT ARRESTOR

GENERAL INSTALLATION MANUAL

ACCESS COVERS Roto-moulded Arrestors use Polymer Access Covers for above-ground and non-traffic installations.

Trafficable cast-iron Access Covers for installation in areas subject to pedestrian and some vehicular traffic can also be fitted. Such installations require the Cover to be set in a finished concrete surround. The choice of plain or decorated surface will bear upon the selection of the suitable Access Cover arrangement. Applied surfaces such as paving tiles may require a particular type of cover or special edged covers. Ensure that all aspects of the final design are considered before ordering Arrestor components and preparing the Arrestor for installation.

ACCESS EXTENSION RISERS Access Extension Risers are optional extras and should be ordered to suit site requirements. These allow drain piping to be laid deeper below final surface level than normal, which may be necessary to accommodate unit installation at a distance from the waste water source, ensuring a sufficient “fall” for free flow.

Note that Access Extension Risers do NOT increase the operation fluid capacity of the Arrestor.

CONNECTIONS These use Connection Sleeves to suit standard 110mm outside diameter DN100 uPVC pipe. Local Authorities in different areas may have particular specifications for drainage piping. For example, drains to Arrestors may be specified as Vitrified Clay (Earthenware), while outlet piping to Sewer may be uPVC. Before starting, ensure that the connection sleeves available match the required pipe, or that a suitable adaptor will be approved by the authority. HDPE pipe now being accepted in many areas is the same diameter as uPVC.OPERATING PRINCIPLE All Passive Arrestors use natural relative buoyancy of waste liquids and solids in the incoming water stream to separate the wastes. Separated matter is retained on the contained liquid

surface and in the bottom of the Arrestor. To optimise Arrestor efficiency, the unit must be regularly cleaned by an authorised reputable maintenance operator. Collected separated waste matter should be pumped out when the total collected waste is measured to be about 15% to 20% of the operating liquid capacity. Where local authorities do not specify the frequency at which cleaning should be carried out, it will be necessary to establish a routine based on the results of regular sampling.GENERAL and HANDLING Principal dimensions are shown in Figure 1. The Roto-moulded Arrestor is of lightweight construction and weighs approximately 100kg. Arrestors secured on pallets or dunnage should be moved by fork-lift trucks, or cranes with pallet handling devices. Arrestors not on pallets may be moved by fork-lift, but it is strongly recommended that they be secured to the mast during transit. Arrestors not on pallets should not be dragged or pushed over any rough surfaces because of the risk of damage. Such means of movement over smooth surfaces must be limited to minor adjustments during the installation process. Arrestors not on pallets or secured dunnage should be lifted by crane. A webbing sling should be wrapped to “choke” around the centre of the vessel, with a tail of not less than 750mm up past the access point from the choke point. Attaching the tail of the sling to the hook of the crane will allow the Arrestor to hang at an angle. Where the Arrestor must hang vertical, two similar slings should be wrapped to choke around the vessel so that the two tails of similar length are on opposite sides of the access point. Both web sling tails can be fitted to one hook.INSTALLATION These instructions apply to normal above-ground installations, and to in-ground installations where the combined mass of the Arrestor and the associated back-fill described therein will be adequate to prevent movement due to buoyant uplift effect. The installation procedures are intended to ensure that the

MAY

15

Arrestor is able to withstand possible external hydrostatic loads. Failure to comply with the recommendations may mean that the Arrestor will not withstand such loads, and improper installation will annul the manufacturer’s warranty.Installation designers and contractors are responsible for ensuring that installation procedures are followed, and adequate steps taken to protect the Arrestor from all possible movement or damage due to external forces not foreseen by the standard instructions, including top loading generated by traffic on or around the Arrestor which exceeds that categorised as Class D in AS 3996. For advice on non-standard or suspended installations, call your local EVERHARD office.Local regulatory authority inspectors may require to be present to inspect several stages of the installation. Seek advice from the relevant authority department before beginning work, and act accordingly. Ensure that the local authority will allow the length of Access Extension required for the inlet and outlet invert depths.A) Roto-moulded Arrestors may be installed with the vessel

base at or above the level of the surrounding ground surface. In such cases, the vessel must be located on a level, horizontal, concrete or masonry hard-stand or plinth, able to support the vessel when filled to the normal operating fluid capacity. In all cases where the top of the Arrestor is to be above the final ground surface level, and therefore not exposed to traffic loads, it is normal for the standard polymer Access Cover to be fitted. Access Extensions are therefore not required.

B) Arrestors in above-ground installations must be secured with bracing or tie-downs to ensure that the vessel cannot be easily moved when empty. Securing arrangements must NOT be attached to the Arrestor with screws, bolts or other fasteners which do, or may, penetrate or abrade the Arrestor. Piping must be properly and independently supported to prevent movement. It may also be necessary to provide barriers or other screening systems to prevent accidental damage from passing traffic etc.

C) Where the Roto-moulded Arrestor is to be installed with the vessel base below the level of the surrounding ground surface, the excavation should be large enough to permit at least 150mm clearance all round the vessel, with adequate clearance around the connections to permit the drainage pipes and vents to be installed. The excavation should allow at least 50mm extra depth for a layer of compacted bedding sand for the Arrestor to sit, perfectly level and flat, at the exact required depth. If there is any possibility of movement such as swelling or subsidence of the subgrade, a concrete binding slab of not less than 75mm thick should be installed.

D) Roto-moulded Arrestors installed with the vessel base below the level of the surrounding ground surface and the top above the ground surface will not be exposed to traffic loads. These are normally fitted with the standard polymer Access Cover. Access Extensions are usually not required as the top of the vessel is visible.

E) Roto-moulded Arrestors installed with the vessel top completely below the final ground surface which are not to be exposed to traffic loads, may be fitted with the standard

Figure 1 - General Dimensions

ABOVE GROUND INSTALLATION

- 2 -

1735

SECTION

1325

INLET

OUTLET

190 1700 190

1080

Inlet

Inve

rt

995 L

iquid

Depth

1005

Trap

Outl

et Inv

ert

65

Disconnector Trap to be Installed by

Plumber

Polymer Access Cover

ø100mm pipe HDPE

Inlet & Outlet Pipework

9039

5

VENT

Turret of trap fitted with Pit Boss during installation for venting of trap

330

26

ø100mm

Trap fitted with Pit Boss during installation for connection of vent where required

VENT

END VIEW735

polymer Access Cover. However, because the upper surface of an in-ground Arrestor will be encased in concrete, An Access Extension will be required.

F) Roto-moulded Arrestors installed with the vessel top completely below the ground surface which are to be exposed to traffic loads, must be fitted with the appropriate cast-iron Access Cover and frame. Because the upper surface of the Arrestor is encased in concrete, Access Extensions are required, and should be trimmed to length so that Trafficable Access Covers are exactly at the finished surface level.

G) Trenches required for the Inlet, Outlet, and vent piping, should be deep enough to ensure that adequate “fall” is maintained from the waste water source to the Arrestor inlet, and from the outlet to the sewer. The “fall” for a 100mm pipe should not be less than 1.65% or 1 in 60. Trenches for Vent pipes should allow a downward “fall” from the vent outlet to the Arrestor. Pipes should be as straight as possible, with a minimum of changes of direction. Ensure that all relevant specifications of AS/NZS 3500.2.2003 regarding protection and cover are met. (See Important Notes)

H) Before installing the Arrestor, prepare the vent port ready to accept the vent pipe connection using a 110mm hole saw to make the opening. The vent ports are available on four sections of the arrestor which are identified as the flat surface shown in the diagram above. Choose one location suitable for your vent pipe work. Insert the 100mm Pit Boss fitting (supplied) into the hole and secure using the four stainless steel screws (supplied). Insert the vent pipe into the Pit Boss and secure using PVC glue for PVC pipe.

I) Lift the Arrestor into the required position in the excavation in accordance with the instructions listed above. DO NOT LIFT the Arrestor using the inlet and outlet pipework as it will damage the unit. Comply with all workplace health and safety instructions regarding the use of cranes and lifting equipment.

J) Ensure the Arrestor is properly seated on the hard-stand or plinth which is smooth and clean if above-ground or on compacted sand if in-ground. If there is any possibility of movement such as swelling or subsidence of the subgrade, a concrete binding slab of not less than 75mm thick should be installed Check that the access opening on top of the unit is completely horizontal, and that the selected Access Cover will be at the required level.

K) Elastomeric Rubber Sleeves are worked over the HDPE inlet and outlet pipe connections and secured with stainless steel hose clips. Outlet and Inlet external sampling and connection assemblies are then pushed firmly into the Sleeve and similarly secured. Other approved fittings such as PVC fittings can be used to connect to the HDPE inlet and outlet pipe work attached to the arrestor, the use of electro-fusion welded joints or other approved rubber ring type fittings may be used.

L) In-ground Arrestors must have the Inspection Opening Covers on the upper ends of the Inlet and Outlet assemblies at the final surface level. The connections from these assemblies to the pipes from the waste-water source and to water traps and sewer pipe may now be made. For clear out or sampling points on the outlet side, ensure brass IO fitting is installed at surface level.

- 3 -

BELOW GROUND INSTALLATION16

55 to

unde

rside

of co

ver a

nd fr

ame

INLET

300 Min 1700 300

1080

Inlet

Inve

rt

995 L

iquid

Depth

1005

Outl

et Inv

ert

SECTION END VIEW

VENT TO STACK

OUTLET

Concrete Base SlabConcrete Base Slab - 75mm Minimum Thickness

Lean Concrete Backfill

C.I. Access Cover & Frame - Class B Shown

1325

ø770Concrete Paving and Suspended Slab to be Specified by Design Engineer

Trap fitted with Pit Boss during

installation

Disconnector Trap to be Installed by

PlumberBrass I.O.

Lean Concrete Backfill

Liquid Level

395

ø735

380 (

Clas

s B)

405 (

Clas

s D)

IMPORTANT NOTESPIPE COVER When positioning pipes, note that The National Plumbing and Drainage Code AS/NZS3500.2.2003 Section 3.7 specifies minimum cover over drain piping as follows:

Location Cast or Ductile Iron

For Other Materials and if Insufficient Cover

Public Roads, rights of way, and areas open to heavy vehicles. 300mm minimum 500mm minimum – or - 50mm overlay and 150mm paving

Other driveways, light vehicle areas. 300mm minimum 450mm minimum – or - 50mm overlay and 75mm paving

Elsewhere - no vehicles, pedestrian traffic only Nil 300mm minimum – or - 50mm overlay and 50mm paving

In certain cases, it may be possible to have less than the minimum cover, but there must be at least 25mm overlay separating the pipe and a concrete slab, or the pipe must have adequate protection against mechanical damage.

M) Ensure the vent pipework is supported correctly and positioned in a proper location to allow lighter than air fumes and noxious odours generated by the trapped wastewater to escape from the arrestor, vents must be installed to a suitable discharge point. Ensure the vent connection allows for expansion using an expansion approved fitting.

N) Where the Arrestor is to use the standard polymer Access Cover, ensure the galvanised lever locking ring supplies is fitted and secured in place. If an Access Extension is required, the bottom end should be trimmed to the required length and fitted on to the Arrestor. It is usual for a rib of the Extension tube to be used as a flange, secured with six stainless steel screws. The upper end of the Extension is fitted with a polymer Collar which accepts the standard Polymer Cover, secured with six stainless steel screws. Where the Arrestor is to use a cast-iron Access Cover, this is fitted over the upper end of an Access Extension which has been installed and secured as described above. Where required, the Access Cover Frame may be placed on the upper end of an Extension Riser. Care must be taken to ensure that it is centrally located. The upper surfaces of the Access Cover should normally be perfectly aligned to match the final surface. Extension Risers shall not exceed 900mm in height

O) The Arrestor should be filled with clean water to operating level preferably from the wastewater source and Inlet pipe, to ensure that there are no leaks. Pipe connections should be closely examined and steps taken to stop weepage. Care must be taken to ensure that there are no blockages which may restrict flow of effluent from the Arrestor to the main drain. Ensure the vessel is filled with clean water prior to backfilling.

P) For inground installations, the arrestor should be installed on a 50mm thickness of bedding sand or if there is any possibility of movement such as swelling or subsidence

of the subgrade, a concrete binding slab of not less than 75mm thickness should be installed. A lean mix of sand and cement (4:1 mix) should be backfilled approx in 300mm thick layers around each side of the arrestor.Each layer of sand and cement mix should not exceed 300mm and may only be moderately compacted and ensure all voids in around the arrestor are filled correctly.These precautions help prevent the Arrestor from being deformed. If an Arrestor is deformed and crushed by the backfill, repairs will not be possible and must be removed and replaced.

Q) Concrete should encase the Access Extension (where fitted) and the Access Cover frame of every in-ground Arrestor, and be finished off at the final surface level. It is essential to ensure that Access and Inspection Covers can be readily removed. A suspended slab, designed by an engineer should be installed around the arrestor opening which shall not place any loading on top of the polymer arrestor.

R) Some local authorities may require compliance plates to be permanently displayed at completed installations. Compliance plates are fitted to EVERHARD Arrestor vessels which display details of the place and date of manufacture, operating capacity and a unique identifying code. Duplicate plates can be supplied on request for the installation contractor to display in convenient locations adjacent to the Arrestor.

S) Maintenance – The arrestor can be cleaned by enter a suction hose through the access cover, Ensure the contents is removed on each side of the main baffle. Once completed ensure the arrestor is filled with clean water prior to placing the lid onto the arrestor and leaving the premises. It is essential the arrestor is filled with clean water after it has been serviced.

www.everhard.com.au | National Customer Service Number 13 1926