Trenches are dug sufficiently deep enough (usually 1.2 metres in depth) to avoid pipe damage from machinery such as sub-soilers or ploughs and also to prevent frost damage. High quality PVC pipe is then laid out and installed within the trench together with any bends, tees and hydrants that are required before all soils are backfilled.
An underground mains route is designed on a scaled Ordinance Survey map of the fields to be irrigated in order to supply water to each field in the most economical and efficient method. This takes into account water volume to be pumped, irrigation field lengths, cropping directions, and where hydrant take-off points are to be sited in each field, which would determine pipe sizes required.
Considerations are also given to the following points when planning an underground mains installation:
‘Mains supply’ refers to the main supply of water throughout underground pipes to the hydrant take off points and is in no way connected to the Local Water Authority ‘mains water supply’.
Once the route is agreed and approved – AJ Freezer can provide a quotation for the supply and installation of all pipework and materials using their own qualified employees and machinery..
Damage caused by machinery or corrosion due to age can cause valves to seize and pipes to break. Our engineers can carry out repairs or replacements to damaged steel hydrants and any broken PVC pipework that may occur.