Shower Not Draining Frozen Pipes ^hot^ May 2026

| Symptom | Frozen Drain | Clogged Drain | | --- | --- | --- | | | Happens during or immediately after a deep freeze. | Any time of year. | | Toilet/sinks nearby | Often also drain slowly or not at all. | Usually just the shower. | | Gurgling | Yes – air trapped behind ice causes bubbles in toilet or sink when shower is run. | Possibly, but more often just standing water. | | Smell | None. | May smell of soap, hair, or sewage. | | Water back-up | Water rises in shower pan, then stays frozen in place overnight. | Water rises but does not freeze. | Safety first: Do not pour boiling water or use a propane torch. PVC can melt; cast iron can crack from thermal shock. Step 2: Locate the Freeze Point The freeze is almost always in the horizontal trap (the U-bend just below your shower drain) or in the horizontal branch drain running to the main stack, especially if that pipe runs through an uninsulated crawlspace or exterior wall.

This is an excellent and important question. A frozen shower drain is less common than a frozen supply pipe, but it is a genuine problem—especially in mobile homes, cabins, bathrooms on exterior walls, or after extreme cold snaps. The danger is that expanding ice can crack your cast iron or PVC pipes, leading to a leak inside your walls or under your slab. shower not draining frozen pipes

Below is a practical, step-by-step guide to identifying, thawing, and preventing frozen shower drains. A frozen drain behaves differently from a clogged one. | Symptom | Frozen Drain | Clogged Drain