What is a Bailer?

Bailers are used for collecting a precise water sample from the aquifer or liquid supply, but usually in a bore hole application.
Advantages that a simple Bailer offers over other sophisticated and more expensive sampling equipment.
1: A very simple construction and Inexpensive.
2: no power requirements.
3: Low cost.
4: Easy to operate by one person.
5: very little maintenance and time needed for  cleaning and sterilizing.
Bailers come in two main types  Disposable and reusable.
There are some great reasons for using disposable bailers
1: very cheap and cost effective.
2: No cleaning time needed.
3: Accurate samples as no contaminants are left in the bailer.
Type of materials used in manufacturing of bailers
Pvc.
Teflon.
HDPE.
Stainless steel. 

• Disposable
• Reusable
  • PVC
  • Stainless

Spearpoints are- A type of bore used in shallow generally unconfined aquifers.

Shallow installations usually reaching no more than 6 metres in depth, these installations are usually for delivering low quantities of water. They amount odf water usually obtained is only for watering a garden, Holiday or a small house.

They are formed by different methods some of these are

1: Drilling a hole by machine or hand and installing casing and screen, in this method the ground conditions must support the hole opening or it will collapse.

2: By hammering your casing and screen directly into the ground using a amchine or a sledge hammer. If using PVC then a drive cap must be fitted to the top and this cap is used to take the hammer blows so as not to split the casing r screen.

3: Jetting, this can be done by using an Air compressor or a high pressure water supply.

A jet of water is pushed through an orrifice in the pointed spear and as the water is coming through the spear point the borecasing is pushed down as the water pushes the sand in front of the screen away, this goes on until the screen is at it's desired depth.

Spear point or Pointed bottom cap are made.

In the right ground conditions you can push your screen abnd casing straight into the ground thus saving a lot of expense by not having to predrill the hole in the ground.

These are made from solid PVC so there is no chance of them splitting into pieces as they are driven into the ground. these can also be made from other materials such as - HDPE, Steel Stainless Steel and any other material that you may need.

They are pushed into the pipe until the pipe hits the shoulder of the point and then they can be secured by gluing or fastening them with a rivot or stainless screw.

When using threaded screens and casing a short piece of the casing is attached to the spear point and will have a female thread so this can then screw staright onto your screen, this is a very quick method with not using any glues.

Manufacturing Sizes- Std. 50mm, But we can manufacture them in any sizes that suit your needs.

These are made form metal that goes over your top casing, so then you can hit the pipe with a driving tool ( large hammer) and by using a drive cap this will limit the chances of the pipe cracking.

This cap just sits on top and when the screen and casing is at the right depth is just simply removed and kept for another day

Washing in or Jetting- can be done by using an Air compressor or a high pressure water supply.

A jet of water is pushed through an orrifice in the pointed spear and as the water is coming through the spear point the borecasing is pushed down as the water pushes the sand in front of the screen away, this goes on until the screen is at it's desired depth.

These can be made in the material that meets your requirements. The Non return valve is to allow the water to go through the orifice to washdown the screen, but not to allow any objects to come back into the screen that could then be sucked into the pump.

In the picture to the left is a sand spear with a permanet wash down valve, therefore it does not need a non return valve. This is used for shallow applications only and often in temporary applications

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