How it works
Siphonic drainage is actually very simple in principle and all systems work in exactly the same.
Siphonic drainage is actually very simple in principle and all systems work in exactly the same.
Where should siphonic systems be specified?
The answer is that almost any building can be drained siphonically but with provisos. For further information download the SRDA Guide to Siphonic Drainage 2024
The answer is that almost any building can be drained siphonically but with provisos. For further information download the SRDA Guide to Siphonic Drainage 2024
How to identify a siphonic outlet
Where older siphonic drainage systems may have become damaged or are in need of repair it may be necessary to identify who designed and installed the existing system. Please refer to the Siphonic Outlet Identifier 2024 pdf or email us if you need help
Where older siphonic drainage systems may have become damaged or are in need of repair it may be necessary to identify who designed and installed the existing system. Please refer to the Siphonic Outlet Identifier 2024 pdf or email us if you need help
What to specify
For further information download the SRDA Guide to siphonic drainage You can also download our standard SRDA Siphonic Drainage Specification in writeable format
For further information download the SRDA Guide to siphonic drainage You can also download our standard SRDA Siphonic Drainage Specification in writeable format
SRDA Overview of BS8490:2025
Following the update of BS8490, the SRDA have produced a document highlighting the key changes.
Following the update of BS8490, the SRDA have produced a document highlighting the key changes.
Clarification of small roof drainge relating to BS8490:2025
The primary focus of BS8490 is on large 'industrial sheds' with the potential for misunderstanding the requirements for smaller buildings. The SRDA has published this document to clarify the issue.
The primary focus of BS8490 is on large 'industrial sheds' with the potential for misunderstanding the requirements for smaller buildings. The SRDA has published this document to clarify the issue.
SRDA Constitution
The SRDAs code of conduct and requirements for its members.
The SRDAs code of conduct and requirements for its members.