For example: On one instance we were called in In to determine why a soakaway had failed. When we took the manhole cover off the inspection chamber we could see that there was no siphon head fitted. This could be for a number of reasons but due to the siphon head not being present, debris floating on the water was entering the installation. The main culprit was drinking straws. It seems that the children in the school had been discarding their used drinking straws into the drain grates around the school, when it rained the straws were washed through the drain pipes and into the attenuation chamber. As the water drained into the deep bore soakaway casing, the straws were cascading in as well, This had been happening over a number of years and now the installation was full, this caused a restriction of flow which was casing the failure. The fitment of a correctly fitting syphon head would have solved this problem.
Typical siphon head design has one distinct problem in that you have to enter the attenuation chamber. For safety reasons the attenuation chamber is classed as a confined space and as such requires the appropriate training and equipment to enter the confined space. This turns a 5 minute job into a very expensive procedure.
So we decided to design our own syphon head for use on deep bore soakaways. Our siphon heads are made to measure, to suit all of the different deep bore soakaway casing sizes, these usually vary in size from 110mm to 250mm diameter casing. The new design allows a rope to be attached to a ring at the top of the siphon head, this allows the fitter to lower the siphon head onto the deep bore soakaway casing without having to enter the chamber. The rope can then be tied off near surface so that it could be removed in future if required. Our siphon heads have the added advantage that there are guides inside the siphon head which allow it to be snug fitting and centralised. Air holes in the top of the siphon head are drilled to stop the head blowing off when there is a fast flow of water entering the deep bore soakaway after a period of dry weather.
The standard siphon head is constructed from heavy duty mild steel and painted. We can also have them galvanised, powder coated or constrcted in stainless steel. Price varies on the number, size, specification and material constrction required.
Contact us for a free no obligation quote now.
Petro Chemical Syphon Head
Deep Bore Soakaway Siphon Heads.
We can also offer a stainless steel petro chemical syphon head.
On new build housing estates, particularly when the deep bore soakaway is accepting surface run off from roads and parking areas, the use of this type of syphon head is advantageous. When fitted to the top of deep bore soakaway casing which protrudes 1 metre from the base of the attenuation chamber, this type of siphon head will stop oil, petrol, diesel or other hydro carbons entering the deep bore soakaway and potentially contaminating the geology at depth. The petro chemical syphon head in this circumstance is constructed in stainless steel. Instead of breather holes being drilled in the top of the syphon head, there are two breather pipes which extend to the top of the attenuation chamber. If for example a car's diesel or petrol tank ruptured, the fuel would run into the drain and eventually find its way to the attenuation chamber. As fuel and oil are lighter than water the spillage will remain floating on the surface of the water and therefore cannot enter the deep bore soakaway. The extended breather pipes make sure that even in times of heavy prolonged rainfall when the flow into the attenuation chamber exceeds the rate of flowing away in the deep bore soakaway, the oil will still remain on the surface of the water. The breather pipes are also fitted with exhaust baffles at the top.
If contamination does occur in the attenuation chamber, the fuel will remain floating and can be siphoned off using a surface pump and disposed of in the appropriate manner.
Contact us for a free no obligation quote subject to material construction and size required.
Copyright 2012 www.borehole-driller.co.uk Water well drilling, water well borehole pumps, deep bore soakaways, water well boreholes, water well drillers, solving drainage problems in clay soils and water well casing. Kent.
Water well drilling and Deep bore soakaway Specialists. Based in Kent,
covering Kent, London, Sussex, Surrey and Hertfordshire.
Telephone: Mobile 07841 151353 LandLine 01304 729742.
Deep bore soakaways in attenuation chambers require the fitment of a siphon head. The siphon head prevents the ingress of foreign objects such as leaves or debris entering the deep bore soakaway casing installation and possibly clogging it up. A steady build up over a period of months or years would cause the deep bore soakaway to fail.