-
Land Drainage Act 1991
— UK legislation governing the management of watercourses by internal drainage boards and councils.
-
Landlord drainage emergency
— Emergency drainage response for rental properties, with landlord notified and works documented.
-
Lateral drain
— Section of drain outside a property boundary serving a single building before the public sewer.
-
Lateral drain survey
— CCTV survey of the lateral drain section between a property boundary and the public sewer.
-
Laundrette
— Self-service or staffed laundry premises with high water use and lint loading.
-
LDPE pipe (low-density polyethylene)
— Flexible low-density polyethylene tubing used in irrigation and minor drainage applications.
-
Lead pipe (legacy)
— Historic lead pipe used for water supply and waste in pre-1970s London property.
-
Leak from waste pipe
— Water leak from a waste pipe joint or split, often discovered as damp staining or drip.
-
Leak under sink
— Water leak beneath a kitchen or bathroom sink from waste pipe, trap or supply connection.
-
Leasehold property
— Property held under a long lease, with shared drainage usually managed by the freeholder.
-
Leaves blockage in drain
— Surface water drain blocked by accumulated leaves and garden debris, particularly in autumn.
-
Lining curing
— Process of hardening a CIPP liner once installed inside a host pipe.
-
Listed building (Grade I, II*, II)
— Building protected under the Planning (Listed Buildings) Act, with restricted drainage works.
-
Listed Building Consent (drainage)
— Statutory consent required for external drainage alterations to a listed building.
-
Listed Building drain survey
— Drain survey carried out at a listed building, taking heritage protection into account.
-
Listed building drainage emergency
— Drainage emergency in listed building, requiring conservation-aware engineers and consent considerations.
-
Local Authority Building Control (LABC)
— Trade body representing council Building Control surveyors enforcing UK Building Regulations.
-
Localised drain repair
— Targeted repair confined to a short section of pipe rather than the full run.
-
Locating wand (sonde transmitter)
— Transmitter inside a camera head that emits a signal for surface location.
-
London Borough drainage requirements
— Local borough requirements supplementing UK Building Regulations and SuDS guidance.
-
Loss adjuster drain inspection
— Independent drainage inspection commissioned by loss adjuster to verify insurance claim cause.
