Po Lam Estate Drain Services

Building data quoted on Wikipedia show that Po Ning and Po Kan Houses are only 22 storeys tall yet carry 52 flats on each floor, the densest blocks on the estate. By design, a twin-wing layout of that kind relies on one long horizontal waste pipe per floor, collecting from flats along its length before delivering everything to the stack; the further the run goes, the harder it is to keep fall and flow velocity, so grease, rice and hair settle at bends and junctions. The symptom is usually not a sudden blockage but a drain that slows again after every clearance: the sink empties sluggishly while you wash up, water pools around your feet in the shower, and the floor drain gurgles at night. If two or three flats on the same floor develop it together, calling separately only clears a short length each; report it to the management office so the whole horizontal run and the podium manholes can be inspected at estate level.

Po Yan, Po Tai, Po Tak and Po Chi Houses are 35-storey Trident 2 blocks with 24 flats per floor arranged along three wings. By design, flats in the same vertical line share one soil stack from top to bottom, and in a layout of the 1988–89 generation the fitments on the lowest few floors normally join that stack near its foot, without the separate discharge into a manhole that newer buildings provide. So if a low-floor flat sees the toilet level rise for no reason, the floor drain well up or the corner of the shower gurgle during the morning and evening peaks or in heavy rain, suspect a restriction in the lower stack or an outside manhole first, not the trap in your own bathroom. Note the time, how long it lasts and whether it was raining, then tell the management office: a shared stack is not something one household can put right alone.

The Buildings Department explains that a trap holds water to form a seal, keeping the foul air inside the drainage pipe out of the room. Bathrooms here are small, and the floor drain normally sees water only when the floor is washed or someone showers. Po Kim House, completed in 2001, has 14 flats per floor and consists largely of one-person units, so water use is lower still and the seal evaporates faster. A long trip away, or the empty spell between tenancies, does the same. The remedy is simple: pour clean water into every floor drain once a week to top the seal back up. If the smell is unchanged two or three days later, or sharpens the moment you close the bathroom door and switch on the extractor fan, look for a cracked trap, a shallower pattern fitted during a renovation, or a leaking branch-pipe joint — rather than masking it with bleach or fragrance.

At the Sai Kung District Council meeting of 6 March 2018, the Drainage Services Department explained that Po Lam Road and Po Hong Road flood because both have hillsides nearby, so rainstorm run-off carries dead leaves and soil down to the lower road and chokes some of the catch drains. The road side is for the Highways Department and the DSD; but the same rain falling inside the estate is taken by a different set of outlets. Wikipedia records that internal estate roads link the shopping centre, the car parks and the blocks and run north to Po Lam Road North, that the three car parks stand opposite Po Ning House, and that a footbridge built in 2001 connects Po Lam Shopping Centre, Metro City Phase 2 and Po Lam MTR station — and the gullies, gratings and manholes at all those places take the leaves and silt washed down from between the blocks, the landscaped areas and the planters. The signs are easy to read: rain starts and water immediately stands at a car-park entrance or a footbridge landing, still there an hour or two after it stops, with mud marks around the grating and leaves matted over it. In practice, clear them once in the leaf-fall season and once before the rains, and on the day of a downpour photograph where the water stands and note the time before passing it to the management office. Outlets inside the estate are the management office's to arrange; for a rainwater drain on the public road, call the DSD's 24-hour drainage hotline on 2300 1110.

At the Sai Kung District Council meeting of 3 March 2026, a member whose office is in the estate said that, as she understood it, most flats at Po Lam had been sold and the small number still unsold were mainly flats with serious seepage, or flats the sitting tenants could not afford to buy; she proposed comprehensive repairs for flats with serious seepage or leakage. For a household, the practical question is which seepage route applies. Households still renting from the Housing Authority report seepage to the estate office first rather than going to the Joint Office themselves: the foreword published by the Joint Office of the Food and Environmental Hygiene Department and the Buildings Department states that it steps into seepage cases in private premises. Owners of purchased flats are in private premises, so if talking to the flats above and below and to the owners' corporation gets nowhere, the Joint Office can be asked to investigate; it brought in a new procedure in full on 16 July 2026, adding infrared thermography alongside the electronic moisture meter at the first stage to identify the likely source, and where there is reason to believe the seepage comes from the flat above it issues a Notification Letter requiring that owner to inspect and complete repairs within 28 calendar days. Owners next door at Ying Ming Court follow that court's own deed of mutual covenant and management arrangements.