Inspection chamber in property boundary

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I found this from survey report:

Above ground drainage ­ Condition rating 2

The main vertical drainage pipe (the soil vent stack or SVP) serving the first floor bathroom 

is located on the rear elevation and is made of cast iron.There is no bird cage and one should be fitted to prevent birds from nesting on the top of the stack.

The lower part or the pipe is within the boundaries of the adjacent property. Please see my comments in section I3.Cast iron is one of the most common materials used for above ground drainage on older 

properties. The material is robust and will last for a long time if it is well looked after, however it can rust and leak without warning and should be well maintained or alternatively removed and replaced with plastic.

The waste pipes from the bathroom and the pipe from the wc have been painted, but these 

pipes could be lead although this can only be confirmed by inspection at close quarters. 

Again lead can be prone to splitting as it ages and so if found to be lead I would recommend replacement with plastic pipework.

Below ground drainage ­ Not inspected. The property is connected to mains drainage but without excavation, the layout of the underground system cannot be confirmed. Your legal adviser should seek confirmation 

through the local searches and obtain a Con29DW which will indicate the location of the underground drain runs.I located an inspection chamber at the front of the property the cover was lifted.

No blockages could be seen in the visible pipe channels, however roots were noted around 

the walls and on the benching.

The true condition of the drains can only be revealed by way of a contractor with specialist 

equipment.I would recommend that you ask your legal adviser to raise an enquiry as to when the 

drains were last checked or cleaned. If this has not been done within the last 12 months 

you should ask an appropriately qualified person to inspect this now