Call Us : 03 688 5669





Providing services for


Commercial & Industrial
Providing services for

Commercial & Industrial

Providing services for


Contracting & Council
Providing services for

Contracting & Council

  • Plumbing & Drainlaying

      Plumbing & Drainlaying

    Residential Services

    From emergencies to simple maintenance, we provide a full range of services:

    • Drainage
    • Fire Installs
    • Tap washers
    • Pre purchase Inspections
    • Leaking valves
    • Leaking hot water cylinders
    • Kitchen alterations and installations
    • Bathroom alterations and installations
    • Plumbing on new housing including underfloor heating
    • Heating System installation
    • Roof leaks and minor repairs
    • Central heating radiator systems
    • Spouting, downpipe, and gutter maintenance
    • Unblocking toilets and drainpipes

    SJ Allen provide a full range of commercial and construction services.

    No job is too big or small. We service small commercial jobs to major Council contracts.

  • Septic Tanks

      Septic Tanks

    Don't let your tank turn septic

    Your septic tank is a storage chamber that will eventually become full. Unless it is cleaned out regularly, your septic tank will not function properly. Over time, a poorly maintained septic tank can become a serious health hazard, spreading disease and contaminating water.

    A professional clean and desludging by SJ Allen, approximately every three years will keep your Septic tank well maintained and in good pumpable condition.

    SJ Allen has years of experience in cleaning out septic tanks. We clean, empty, desludge and treat septic blockages. Plus, we have specialists that look after modern Septic systems that need regular maintenance between emptying with regards to filter and aeration pumps etc.

    Once you're on our database, you can be assured of never missing regular maintenance and servicing of your septic system, you can also be assured of a clean service from start to finish as our vehicles are modern, hygienic and well maintained,

    Call now for your free, no obligation quote on cleaning and emptying your Septic Tank.


    Many domestic homes, especially those in rural areas, are not able to connect to a town sewage system. These properties have their own on-site disposal systems. The most common form of on-site disposal system is a septic tank.

    How do they 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 fats float to the top. The remaining liquid flows out of the tank and discharges into a soakage area (either a dispersal or evaporation field).

  • Portable amenity units

      Portable amenity units

    SJ Allen Limited provide a high quality range of portable amenity units for domestic building and renovations.

    With uses ranging from admin/site offices, break/lunch rooms, cleaning facilities, storage solutions and more, our portable portable amenity units for weddings and events. They are well designed with delivery available.

    Currently available :

    • Smoko units
    • Ladies & Mens toilet units
    • Portable toilet
    • Water tank units

    A perfect option for either short or long term use,  SJ Allen Limited offers an affordable and reliable option to suit your requirements and specific usage.

    We are proud to provided solutions to our customer base and whether you are large, small, private, commercial or public, we are your portable amenity units specialists.

    We provide a range of accessories that ensure your portable building solution exceeds your expectations and consist of but not limited to the following:

    • Jug
    • Cups - Coffee/Sugar/Tea
    • Cleaning products
    • Toilet paper
    • Hand soap
    • Hand towels
    • Pin board
    • Whiteboard
    • Computer desk
    • Power supply
    • Water Connection
    • Self-contained waste holding tank
    • Seats
    • Refrigerator

    Units can be built to almost any specification required, depending on time-frame of delivery. We are happy to discuss all or any requirements you may have. Units are stackable if required and in accordance to site conformation.

  • CCTV

      Domestic CCTV

    SJ Allen conduct Domestic CCTV observation for full drainage home surveys.

    Whether you’re buying a new home and want peace of mind or need to pi point an issue, we can provide a full CCTV drain report.

    See the inside of your drains for yourself. Our surveys come to you in simple formats. Our inspections allow you to see inside your drains and determine standard, quality and functionality.

    • Identify blocked drains
    • Locate tree root intrucsion
    • Identify the loction of the drain
  •  Water Tank Cleaning

      Water Tank Cleaning

    Do you have your own private water supply? A rainwater tank connected to your roof or a tank connected to a nearby stream, bore or well. It is essential to have your Water Tanks cleaned out on a regular basis.

    Sludge and contaminants build up in the bottom of the tank from debris entering the system generally through the roof and guttering. This sludge can contain harmful bacteria and can pose a significant health risk. Regular maintenance helps avoid costly blockages of pipes and pump systems and helps ensure the purity of your drinking water supply.

    SJ Allen Water Tank Cleaning encourages regular check ups and annual tank cleaning. Safe water is an absolute necessity you and your loved ones. Our specialist equipment efficiently removes sludge and contaminants from your tank.

    To arrange a Tank Cleaning consultation, don’t hesitate to call or email today.

  • Water Blasting

      Water Blasting

    SJ Allen has multiple water blasting trucks for a wide range of service provision from drain cleaning and pipe unblocking to dairy shed cleaning and preparing surfaces for pre-painting.

    By using vacuum trucks and water blasters, we can also clean grain silos, feed silos, molasses tanks and any other agricultural storage facilities.

    We offer varying pressures and volumes from 1300psi to 3000psi. Our water blasters are capable of pumping up to 280 litres of water a minute! SJ Allen Water Blasting are equipped with various size nozzles to cope with a wide variety of applications, including:

    SJ Allen’s Domestic Water Blasting service consists of Fence, Pathway, Driveway, Cobblestone, Deck, Swimming Pool, House Wall and Roof blasting.

    General Applications

    • Clearing blocked Culverts
    • Clearing blocked drains
    • Cow shed cleaning
    • Removal of silt from yards and platform drains.
    • Irrigation pipe cleaning
    • Root Cutting - don't dig, try us firs.
    • Toilet or Septic Tank blockage
    • Storm Water Blockage
    • Silo cleaning
    • Pre painting/pre work for buildings, fences and roofs
    • Clearing of blocked pipes
    • Cleaning of sewer and stormwater pipes
    • Clearing of road culverts

    Contracts Undertaken

    • Alliance Group – Pukeuri
      • major sub-contractor undertaking waterblasting clean-up after the major fire at the Pukeuri Plant
      • included in the contract was the waterblasting of non-slip surfaces into concrete flooring
    • Eastridge Irrigation Scheme – Patearoa
      • currently undertaking waterblasting of inside of 1200 diameter irrigation pipes in preparation for application of protective coating.
    • Timaru District Council – Caroline Bay
      • clean out of Pump Station and waterblasting in preparation for painting
    • Kakahu Irrigation Scheme – Geraldine
      • waterblasting debris build-up from irrigation culverts

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