May 27, 2025
Catalyst’s Paul Duddle to champion wider participation as new Subsidence Forum Chair
Catalyst Services UK Operations Director Paul Duddle has been voted in as the new...
Illustrations
Our illustrations provide a visual explanation of off mains drainage methods, building subsidence, water service pipe responsibility and drainage pipe responsibility.
Building Subsidence
Subsidence is the vertical downward movement of a building foundation caused by loss of support of the site beneath the foundations.
It’s a serious problem and has many causes including leaking drains and sewers.
Click here for more detail.
Off Mains Drainage
There are three commonly-used options for when wastewater cannot enter a mains sewage system.
Click here to find out more about cesspits, septic tanks and sewage treatment plants.
Water Pipe Responsibility
When pipes need repairing or replacing, it’s important to know who is responsible for them.
Click here to see illustrations where we explain who is responsible for each water service pipe depending on the type of property.
Drainage Responsibility
Similar to water pipes, it’s important to know who is responsible for which drainage pipes.
Click here to see illustrations explaining drainage responsibility and drainage misconnection risks.
Latest News From Catalyst
Helping business and domestic customers every day of the year
April 29, 2025
Catalyst publishes subsidence investigation and monitoring guide
The latest techniques for investigating and monitoring subsidence are explained in the second part...
April 22, 2025
Sewer coding training gives Catalyst insurance clients the edge
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