British Standard Markings 8565:1981
~ Licence Number Grooves Lengths of Straight BS BS BS65 Licensed Pipes & Channels sizes sizes
Manufacturers only BS pipes can be made mm mm
If other ordinary BS pipes, then plus one...
BS Channel Interceptor Detail of Intercepting Chamber Fresh Air Inlet
Available in 100 mm to 450 mm - Fresh air inlet
nominal bore sizes (see section below)
To receive stopper Type B Vertical Inspection 600 mm -100m pipe
Why subsoil water drainage U'HepEline' ;vi"trif"ied pipes Concrete porous pipes 681194:1969 may be necessary 75 mm centres o8mm;d:~~""l Non-porous invert
1. To eliminate surface ==_--.,'/30 + .1
flooding and so
produce a dry...
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