A slow shower drain usually has hair, soap, and debris near the grate or in the first section of the drain. If other fixtures also gurgle or water backs up elsewhere, the blockage may be farther downstream and should not be treated as a simple local clog.
Start at the grate and accessible hair
Remove the grate only if it is designed to come off and pull accessible hair with a suitable plastic tool or hook. Wear gloves and do not reach blindly where sharp debris or hidden objects may be present.
Separate a local buildup from a shared drain problem
Run a small amount of water and watch nearby sinks, tubs, or toilets. Gurgling, backup through another fixture, or several slow drains suggests a shared line and is a reason to stop treating only the shower.
Mechanical removal is usually more useful than pouring products
Hair and soap respond better to removal than to homemade mixtures. If a chemical drain cleaner has already been used, do not disassemble plumbing or add other products until you have checked the label and avoided splash or reaction hazards.
Fast recurrence can point to a deeper restriction
If the shower slows again soon after hair removal, buildup farther down, poor slope, or a partial line blockage may be involved. A plumber can clear the correct section without damaging piping or pushing the obstruction deeper.
Sources
- U.S. Environmental Protection Agency (EPA) — WaterSense Home Maintenance — Household water maintenance, leaks, fixtures, and efficiency.