Call Us : 03 688 5669





  • How we unblock your drains?

    Our hydro jet machine forces water at high pressure through flexible hoses. The equipment can negotiate bends and has the ability to clear most blockages ranging from roots to silt and debris.

    This high pressure water blasting or jet flushing machine can quickly and effectively clear blocked drains and eliminate tree roots (often a main cause of blocked drains).

    When the high pressure water flows through the specially designed nozzles the water is transformed into powerful jets.

    The result - CLEAN, CLEAR PIPES & DRAINS!

    Electric Eel

    To unblock drains we may use what in the trade is called an Electric Eel. This is also known as a "Sewer Snake" or a "Toilet Jack". The Electric Eel is a flexible auger or drill-like tool that removes blockages in waste pipes, drains and sewers.

    The engine spins the drill or blade in a clockwise direction into the blockage allowing the retrieval of objects such as hair, combs, small toys and cloth. If the blockage is not retrievable, the Electric Eel can also break up blockages such as tree roots, foam and plastic objects

    If the drain is not completely blocked but the flow has been reduced, the Electric Eel flails around the inside of the pipe scraping off accumulated deposits and matter.


  • How do we use CCTV equipment?

    When undertaking any drain CCTV inspection, our sophisticated and high-tech drain camera is inserted into the drain or pipe. It is then fed along the pipe and records direct to DVD all images.

    Once the blockage has been identified using our drain CCTV technology, the technician then utilised a feature of the camera head to determine the ground depth of the blockage as well as it's precise location.

    We are able to then mark the block/blockage area on the ground above. This specialised drain CCTV technology enables us to accurately locate the blockage to within 100mm.


  • What is a Cesspit?

    Cesspits and soak holes are small catchment/drains used to divert surface flooding. Commonly, Cesspits tend to block up due to excess silt, debris, rubbish and leaves.

    We can either use a vacuum loader to suck out the material in the cesspit or flush a cesspit with the hydro jetter to clear it.

    Soak holes are prevalent where there are few or no standard storm water lines available and are primarily designed to disperse storm water and excess rain water from a cess pit.

    Often they can be defective due to an excessive build up of silt and therefore this inhibits ground leaching


  • How often do Septic Tanks need cleaning?

    Septic tanks generally need pumping (cleaning out) every 3–5 years to remove sludge and sediment.

    • The frequency depends on what goes into the system
    • How many people use it and the capacity of the tables
    • Whether you recycle grey water
  • Why is cleaning your grease trap is important?

    Disposing properly of used fats and oils is very important. If you don't, they can cause expensive problems later. Fats will become solid and eventually biock your pipes requiring a plumber to clear. - AVOID COSTLY REPAIRS...

    • Cleaning the trap should be done regularly - once a month is usually alright but it will depend on your type of business and how much fat is going into the grease trap. Three months would be the maximum.
    • We service many clients within the South Canterbury area, and are able to assist you with information for local coucil bylaws in this area.
    • What happens to the waste from the grease traps? We recycle it where we can. If that cannot be done, we dump at the approved site for processing which is the Timaru District Council Milliscreen.
  • What is a grease trap?

    A grease trap is a device designed to intercept grease in a foul water discharge.

  • How do septic tanks work?

    Wastewater from the kitchen, laundry and bathroom discharges into a septic tank buried on the property. The heavier solids settle to the bottom of the tank, while suspended solids float to the top. The remaining liquid flows out of the tank and discharges into a soakage area (either a dispersal or evaporation field).

  • What is a confined space?

    A confined space is any area that is not intended for human occupancy and that also has the potential for containing a dangerous atmosphere. A confined space:

    • Is large enough for a worker to enter and perform assigned work;
    • Has limited entries and exits;
    • May contain a hazardous atmosphere, arising from chemicals, sludge or sewage;
    • Is constructed so that anyone who enters could be asphyxiated or trapped by walls or floor that converge to a small cross-section, such as a hopper;
    • Contains a material, such as sawdust or grain, that could engulf anyone who enters.

    Examples of a confined space include a tank, vessel, vat, silo, bin and vault.

    Others which are less obvious can be equally dangerous like open- top tanks and vats (particularly where heavier than air gases or vapours may be present), closed and unventilated rooms, or furnaces and ovens in which dangerous accumulation of gases can build up because of restricted air circulation even though the door is left open.

SJ Allen North

Timaru Head Office Yard
7-17 Redruth Street, Timaru
03 688 5669
0800 155 669

SJ Allen South

Oamaru Yard
10-12 Regina Lane, Oamaru
0800 725 536