Surface Water Drainage

General

With correct design and installation, maintenance needs for all linear drainage systems should be minimal. However, it is essential to continued efficient drainage performance that all channels, inlets and outlets are kept free from blockage or accumulations of silt and debris. To that end, regular inspection is recommended.

Frequency of inspection and maintenance is dependent on local conditions, the surrounding environment, and on the actual gradient within the installed system.

Any temporary blockages can be successfully eliminated provided that:

  • sufficient inspection/access points are designed into the system.
  • no hardened material is allowed to choke the bore.

Commissioning and handover

On completion of installation:

  • Flush all excess mortar and building debris from the bore.
  • Empty silt traps.
  • Clean out/clear all inlet holes (including slots or grid apertures).

For Safeticurb units DBA/DBJ

Slot apertures without cast iron inserts can be damaged when stones are impacted into the slot by vehicles. Clear all loose stones. (Slots should also be protected during construction when stones are present).

For Safeticurb units DBA/DBJ/DBK

Ensure slot apertures are cleared of all loose stones. (This is especially important when adjacent soft landscaping works are undertaken). Further advice is available from the Technical Services Department, Tel 01335 372222.

If necessary, cut back road surfacing adjacent to inlet holes in order to ensure unimpeded access for surface water (a special cutting tool is available on request).

Routine maintenance procedures

Inspect system regularly for obstructions, or heavy detritus build-up.
Empty gully pots/inspection chambers to remove all silt.

Where necessary, cleaning or unblocking can be achieved by:

  • high pressure water jetting.
  • hand rodding.

For Highway/Mini Highway

If necessary, cut back road surfacing adjacent to inlet holes in order to ensure unimpeded access for surface water (a special cutting tool is available on request).

Routine maintenance procedures

Inspect system regularly for obstructions, or heavy detritus build-up.
Empty gully pots/inspection chambers to remove all silt.

Where necessary, cleaning or unblocking can be achieved by:

  • high pressure water jetting.
  • hand rodding.