Common in Kwun Tong
industrial-converted buildings have unusual outdoor drainage configurations; commercial-spec pipes sometimes mismatch residential rainfall.
Pre-call DIY checks (dry-day only)
1. Lift grating, manual remove leaves + silt — 5 min, $0.
2. 5L water test — drains in <10 sec = clear, 30+ sec = pro needed.
3. Hot water + dish soap maintenance flush — clears soft buildup.
What we do on a Kwun Tong call
Diagnostic first, treatment after
We assess grating, P-trap, vertical pipe access (20-30 min). Quote in writing via WhatsApp before any work. For shared vertical pipes, we report only — OC sign-off needed before stack-level work.
Kwun Tong pricing
Starting HKD 800 for residential outdoor/balcony drain clearing in Kwun Tong. Includes 2-hour typical response, grating lift + manual silt removal, P-trap mechanical clear, flow-rate test, before/after photos. Pre-monsoon scheduled work bookable 7+ days ahead at standard rate.
30-40 min Kowloon typical window. NT +HKD 50. Out-of-hours rare for outdoor work; we typically schedule in daylight.
Shared vertical pipe work: separate quote after OC sign-off, typically HKD 1,500-3,500.