Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
National standards for waste/soil/drainage systems
In the British/European Standard for drainage systems (BS EN
12056-2:2000) they describe 3 or 4 general differences of drainage systems: System I Single discharge stack system with partly filled branch discharge pipes Sanitary appliances are connected to partly filled branch discharge pipes. The partly filled branch discharge pipes are designed with a filling degree of 0.5 (50%) and are connected to a single discharge stack. System II Single discharge stack system with small bore discharge branch pipes Sanitary appliances are connected to small bore branch discharge pipes. The small bore branch discharge pipes are designed with a filling degree of 0.7 (70%) and are connected to a single discharge stack. System III Single discharge stack system with full bore branch discharge pipes Sanitary appliances are connected to full bore branch discharge pipes. The full bore branch discharge pipes are designed with a filling degree of 1.0 (100%) and each branch discharge pipe is separately connected to a single discharge stack. System IV Separate discharge stack system Drainage systems type I, II and III may also be divided into a black water stack serving WC's and urinals and a grey water stack serving all other appliances. . . . OK, ignoring System IV (which I just included for its misplaced apostrophe for eats shoots and leaves fans) what's what with I - III? In particular I can't get my head around System I: 'partly filled branch discharge pipes' - are these relatively large bore, laid with no fall and arranged to have water standing in them permanently? And am I correct in thinking System II is the general British (and therefore best :-) type? Stan the Span |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|