Is a slow drain in winter always frozen?
No. Grease, debris and an existing restriction can cause similar symptoms. The location and timing need investigation.
Detroit, Michigan · Drain and sewer services
A practical guide for Detroit homeowners.
An exposed or poorly protected section needs attention before cold weather. A winter blockage can also be caused by grease or debris, so do not assume every stopped drain contains ice.

Check known unheated spaces, exterior penetrations and accessible pipes near a draft. Record where the pipe becomes cold and whether a nearby fixture is also affected. A qualified assessment can distinguish a drainage problem from a frozen water supply.
Suitable insulation and control of cold air entering an unheated space can help protect vulnerable plumbing. The appropriate treatment depends on the pipe and surroundings. Avoid covering fittings that need access without making provision for future inspection.
Do not use an open flame on plumbing. Avoid pouring boiling water into a stopped drain or using electrical heating equipment near standing water. If the condition of the pipe is uncertain, arrange an inspection rather than forcing heat into a concealed section.
A return to normal drainage does not rule out a damaged joint or leak. Look for fresh moisture from a safe accessible position and report any change in smell, drainage or fittings. Recurring winter trouble deserves a review of the exposed route and insulation.
No. Grease, debris and an existing restriction can cause similar symptoms. The location and timing need investigation.
No. Adding water can create an overflow. Stop using the affected fixture and explain the symptoms when you call.
Clogged Drain Repair in Detroit — Clear the blockage and check the fitting that caused it.
Call with the address, affected fixtures and any previous inspection details. The phone line is available 24/7; confirm the current service window and proposed scope on the call.