-
Macerating toilet (Saniflo)
— Toilet with a built-in macerator and pump for connection to small bore pressurised pipework.
-
Macerator emergency
— Urgent response to failed macerator unit, often in basement or attic bathrooms.
-
Macerator failure (Saniflo)
— Failure of a macerator pump such as Saniflo, preventing waste from a basement WC reaching the drain.
-
Macerator unblocking
— Clearance of a macerator pump and its small bore discharge pipe.
-
Macerator unit
— Small pump and grinder under a toilet or basin that lifts waste through narrow pipework.
-
Maisonette
— Flat occupying two or more floors with its own external entrance, often above shops.
-
Manhole
— Large access chamber over a drain or sewer allowing entry for inspection and maintenance.
-
Manhole condition survey
— Survey assessing the structural and functional condition of drainage manholes and chambers.
-
Manhole cover (cast iron)
— Heavy ferrous lid over a drainage chamber, traditional UK pattern in heritage settings.
-
Manhole cover (composite)
— Lightweight non-metallic chamber lid using polymer or composite materials.
-
Manhole cover replacement
— Removal and renewal of an inspection chamber cover and frame.
-
Manhole rehabilitation
— Restoration of an inspection chamber to acceptable structural and watertight condition.
-
Manhole step iron
— Galvanised or plastic-coated metal rung built into the wall of a deep drainage chamber.
-
Mansion flat (Victorian conversion)
— Flat created by subdividing a large Victorian house, typically with retrofitted drainage.
-
Manual Handling Regulations 1992
— UK regulations setting out duties to assess and reduce risks of injury from manual handling.
-
MDPE pipe (medium-density polyethylene)
— Blue medium-density polyethylene pipe used primarily for cold water mains supply.
-
Mechanical rodding
— Manual clearance of drains using flexible rods pushed through pipework.
-
Mews property
— Converted stable or coach house behind main street, with limited rear drainage access.
-
Mid-terrace house
— House located in the middle of a terraced row, with party walls on both sides.
-
Mild steel pipe
— Black uncoated steel pipe used for gas, heating and industrial drainage applications.
-
Mini camera (push rod)
— Small camera on a flexible push rod used to inspect domestic drains.
-
Mini excavator (1.5 to 3 tonne)
— Small tracked excavator used for drainage trenching and chamber excavation.
-
Mini jetter (portable)
— Compact portable jetter used inside buildings and for small waste pipes.
-
Modular house
— House built off-site in modules then assembled on plot, with prefabricated drainage runs.
-
Mop sink (cleaner's sink)
— Low sink used for filling buckets and emptying mop water in commercial settings.
-
Mould around drains
— Black or pink mould growth around drain outlets, gullies and overflow areas.
-
Mud and silt blockage
— Drain blockage caused by ground silt or mud entering the pipe through cracks or joints.
-
Mud gully
— Gully with a deep sump designed to collect silt and mud before the main drain.
