Delivery & Warranty Details

  • Delivery

    • Precast concrete sections weighing in excess of 2500 kgs that are delivered to a jobsite on a Newmarket Pre-Cast Brokered Crane Truck can be placed in their permanent position only if proper access is provided to a firm, flat, level and obstruction free area of sufficient size to accommodate our vehicle. The centre of the placement location must be located directly to the rear of the Crane Truck and within 5 to 7 metres behind the vehicle.
    • Sections weighing less than 2500 kgs are not normally placed but simply off loaded for others to move into position.
    • Our crane operators are instructed to refuse to attempt any operation that may involve a safety hazard or jeopardize our equipment.
  • Limited Warranty and Limitation of Liability:

    Newmarket Pre-Cast warrants its product to be free of defects in material and workmanship, insofar as such products are of its own manufacture and are installed and used in accordance with our recommendations. This warranty shall be in effect for a period of one year from the date of shipment.

    This limited warranty covers the repair or replacement, as Newmarket Pre-Cast may elect, of defective products regarding which, upon discovery of the defect, the purchaser has given immediate written notice.

    Replacement of the product in question will be made under the same conditions that it was purchased _ F.O.B. the factory or delivered to jobsite. Replacement or repair of the product only, exclusive of labour costs involved or any other consequential damage shall be the limit of liability to Newmarket Pre-Cast.

    This warranty does not apply to any product that has been subjected to abuse or misuse, nor to a product that has been altered or modified by others in any way so as to, in our judgement, affect its dependability.

Installation Guidelines

  • Site:

    The installation site must be accessible to large heavy crane equipment. A firm, flat and level area of sufficient size to allow maneuvering room for this type of equipment must be provided. This area must be free of overhead wires, tree limbs, or other above-grade obstructions which could affect normal crane operation.

    Newmarket Pre-Cast can quite often offer the service of placing our products in properly prepared excavations. Please contact the factory about what is involved.
  • Excavation:

    Excavation length and width should allow for a minimum of 300 mm clearance on all sides of the precast. More space must be allowed if any work is to be done on the outsides of the unit after installation.

    To minimize stress on a tank or chamber, it should be placed on a base of gravel or crushed stone, minimum 150 mm thick. Soil conditions must be firm and stable.
  • Joint Seal:

    • The mating surfaces of the joint should be clean and dry. The lower section of tank should be placed in its final position in the excavation. The joint of this section should be made clean and dry, then mastic strips of sealant applied.
    • Using lifting equipment that is safely adequate for the job, hoist the upper section of the tank a few feet above the ground in an open area away from the excavation. The joint surface of this section must now be inspected. A broom should be used to sweep away adherent debris. Care must be taken that the people doing this part of the job have ample room to maneuver and do not at any time work directly under the hanging load.
    • Should it prove impossible to clean the joint properly in this way, the upper section must be safely blocked up in position allowing access from underneath.
    • Once both joint surfaces are clean, dry and free of debris and extra mastic has been applied in areas where the male or female joint might have been chipped or broken in handling, the upper section can be carefully set directly onto the lower section.
    • Allow the tank to stand until the mastic is completely crushed into all parts of the joint and it stops extruding from the sides. The ambient Temperature will effect the time required, twelve hours not being uncommon. Backfilling could take place immediately after the tank is installed, however, we recommend to ensure an absolutely water-tight seal, that the joint be Parged both inside and out. This should not be done until mastic stops extruding from the joint and the top has settled into its final position. Water should not be allowed to come into contact with the joint from the time of assembly until after the parging material has cured.
    • Parging the joint requires that excess mastic extruded from the sides be removed. Hydraulic Cement should be pushed into any gaps where sealant does not extrude. A cap of Hydraulic Cement approximately 20 mm thick at the joint seam and tapering back 150 mm above and below the joint should be applied.


  • Pipe Connections:

    Fill the tank with water to 18 inches (460 mm) above the connection. Observe the connection at the outside of the tank for a suitable period of time; usually between 2 - 24 hours
  • Joint:

    For Joint- testing; It is recommended that the tank is entirely backfilled, then filled with water 12 inches (300 mm) above the joint being tested and no more than 12 inches (300 mm) below the ceiling. Observe the water level for a suitable period of time, usually 2 - 24 hours, by measuring at the start and end of the period.
  • Assembled Tank:

    Fill the tank to the underside of the roof slab or to a point up inside the access riser. This access riser should be a one piece casting integral with or mechanically connected and sealed to the top of the tank. Note the liquid level, let stand for a suitable period of time and check the level.
  • *Caution:

    Filling The Tank With Liquid Before Backfilling: Many of the precast tanks detailed in this catalogue rely on support from the surrounding earth, in which they are buried, to resist stress imposed by the contained liquid. It is recommended that the tank at no time be filled without being entirely backfilled, This will Void any Warranty.
  • Compaction of Backfill:

    Compaction of fill around a tank can impose stresses sufficient to cause failure of the walls. Discretion must be used in this operation. Naturally large tanks with comparatively thin walls are more susceptible to damage than some of the heavier designs. Gradually filling the tank with water as the backfill is compacted is one method of minimizing this external stress .
  • Foundation:

    Although concrete tanks are very heavy, they will float in a fairly shallow depth of water. If the tank must remain free of backfill for testing purposes etc., for any appreciable length of time, measures must be taken to ensure that water does not accumulate in the excavation.