Two of the drains taking water from the rainwater down spouts are blocked - i think through years of accumulated moss from the roof.
However when i pour water down a nearby drain that isn't blocked it does not follow the normal sewer as cannot be seen flowing when I remove the man hole cover further along the main sewer.
Have I just got collapsed drains that mean no water from the rainwater down pipes is reaching the main drain, or do these just run to a seperate system - e.g. a French drain under the paved over patio.
The house was built in 1902.
Thanks Martin
However when i pour water down a nearby drain that isn't blocked it does not follow the normal sewer as cannot be seen flowing when I remove the man hole cover further along the main sewer.
Have I just got collapsed drains that mean no water from the rainwater down pipes is reaching the main drain, or do these just run to a seperate system - e.g. a French drain under the paved over patio.
The house was built in 1902.
Thanks Martin