09/05/2023
Which method of installing a sandspear to I use
I continually get asked “can I and how to I install a sandspear?”
My answer to this question is simple, “Yes you can.”
I am not just saying this to sell another sandspear, as my integrity will not allow.
Me to rip anyone off or sell you something you don’t need.
Just in case you don’t believe this, then please buy it from someone else.
I have said in the pass that I have never had a failure, that’s true and it’s not,
Unfortunately, I had someone who tried to install it in clay soil condition.
These are sandspears, and as their name suggests, they are only designed to be installed.
In sand and can be done by a DIY type of person.
Now getting back to the installation method
There are basically three types of installation.
Bail in
Wash in and
Drive in
The method you use will depend on what you are comfortable with doing and what skills you may have and what equipment and tools you have available.
Let’s look at the “Drive-in method”.
The materials will cost more as the 50mm riser pipe has to be gal pipe, to take the
Impact of driving it into the ground.
In this method the sandpaper has a solid point on the bottom of it and is driven into the ground
By impacting it with a sledgehammer or some type of device like a fence post driver.
This method uses the least amount of equipment.
The wash-In method.
The sandspear has a pointed end, with a hole drilled through it, high pressure water is pushed through an inner pipe inside the riser pipe and the sandspear, thus pushing the sand out of the way and by pushing the riser pipe down the sandspear is inserted in the sand.
This method needs a water supply and a high-pressure water supply and piping, the sandspear is the most expensive type, but there is a lot let physical force needed and no chance of any damage occurring as there is no impact force.
By using the Bail-in method, this allows you to buy the cheapest version of the sandspears.
What you do need extra to purchase is some larger diameter casing, that you need to install in the ground to the depth to where there is water.
You do this by using a device that can extract sand and then push down the casing, usually the bailer fits nicely inside the casing you are going to use, as you bring up the sand to the surface you push down the casing. The casing can be cheap Pvc stormwater type pipe, or whatever you have laying around.
Once you have reached the water depth needed, you lower the spear connected to the riser pipe.
The things to remember is that the top of the sandspear, should be below the static water level by 800 to 1000mm, to ensure no air enters the suction line.
Unfortunately, there is no guarantee on how much water you will get from your installation or the quality of the water, as ground conditions change in every direction.
What we have found that is because it is in a sand aquifer, there is usually always some amount of water.
Hoping this helps answer some of your questions.