Building services
Plastic Pipes Conference Association # 1974 Southampton
West
The purpose in presenting this Paper is to discuss the practical experience gained from the installation of a system of PVC drains and the advantages to be gained from a modern approach to the design of housing estate drainage by use of plastics components.
Terms and abbreviations used in this Paper are peculiar to drainage and a brief glossary is appended.
Why Droitwich used PVC
In 1968 the Droitwich Development Committee had in hand the development of an estate using a modified *Radburn layout including houses of a semi-industrialised system of construction. In the first instance the main Contractor for the 3rd Phase of what was a 1000 dwelling estate requested permission to use PVC pipe instead of clay pipes at no extra cost. This was considered by the Committee and the following points were taken into account before permission was granted to the Contractor
- Although at that time there was no B.5. specification the system which the Contractor had in mind to use was the subject of an Agreement Board Certificate.
- The manufacturer of the system had prepared detailed laying instructions including the use of granular bed and surround and it was considered that permission could only be given to the Contractor subject to the Contractor undertaking to comply strictly with the maker’s instructions.
- The Contractor would not be relieved of any of the test obligations laid down in his Contract.
- Whatever troubles or difficulties the Contractor might encounter there could be no overall addition to the cost or other variation of the terms of the Contract.
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