• Bypass Separator NSBE020 Cutaway
  • Bypass Separator NSBE020
  • Bypass Separator NSBE020 Cutaway

Our bypass separators provide the ideal solution for low risk floods – when there is little possibility of a combined heavy rainfall and large spillage. read more

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Professional installation available

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Delivery within 3 working days

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Fully compliant product

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Full design support available

Bypass separators fully treat all flows generated by rainfall rates of up to 6.5mm/hr. This covers over 99% of all rainfall events.  Flows above this rate are allowed to bypass the separator.

Features and benefits 

  • Light and easy to install, saving you time and money
  • Class I design
  • GRP or rotomoulded construction (subject to model)
  • Oil alarm system available (required by EN858-1 and PPG3)
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level
  • CE-marked

Bypass separators fully treat all flows generated by rainfall rates of up to 6.5mm/hr. This covers over 99% of all rainfall events. Flows above this rate are allowed to bypass the separator. These separators are used when it is considered an acceptable risk not to provide full treatment for high flows, for example where the risk of a large spillage and heavy rainfall occurring at the same time is small.

Product code Flow (l/s) Peak Flow Rate (l/s) Drainage area (m 2) Storage Capacity (Ltrs) Storage Capacity (Ltrs) Length (mm) Diameter (mm) Access Shaft Diameter (mm) Base Inlet Invert (mm) Base to Outlet Invert (mm) Standard Fall Across (mm) Min Inlet Invert (mm) Standard Pipework Diameter (mm)
- - - - Silt Oil - - - - - - - -
NSBP003 3 30 1670 300 45 1700 1350 600 1420 1320 100 500 160
NSBP004 4.5 45 2500 450 60 1700 1350 600 1420 1320 100 500 160
NSBP006 6 60 3335 600 90 1700 1350 600 1420 1320 100 500 160
NSBE010 10 100 5560 1000 150 2069 1220 750 1450 1350 100 700 315
NSBE015 15 150 8335 1500 225 2947 1220 750 1450 1350 100 700 315
NSBE020 20 200 11111 2000 300 3893 1220 750 1450 1350 100 700 375
NSBE025 25 250 13890 2500 375 3575 1420 750 1680 1580 100 700 375
NSBE030 30 300 16670 3000 450 4265 1420 750 1680 1580 100 700 450
NSBE040 40 400 22222 4000 600 3230 1920 600 2185 2035 150 1000 500
NSBE050 50 500 27778 5000 750 3960 1920 600 2185 2035 150 1000 600
NSBE075 75 750 41667 7500 1125 5841 1920 600 2235 2035 200 950 675
NSBE100 100 1000 55556 10000 1500 7661 1920 600 2235 2035 200 950 750
NSBE125 125 1250 69444 12500 1875 9548 1920 600 2235 2035 200 950 750