Quick price snapshot
| Your Problem | What It’s Called | Ironclad Price | Austin Range | Ask Why If Over |
|---|---|---|---|---|
| Drain smell coming from floor or shower | P-trap replacement or dry trap repair | $175 | $100-$275 | Over $350 |
What this price usually includes
This page isolates Ironclad’s published number for p-trap replacement or dry trap repair so you can compare one quote against the Austin market before you book anyone.
At Ironclad, the published reference point is $175. The broader Austin range we track is $100-$275. If you are being quoted over $350, the burden is on the company to explain the access problem, code upgrade, emergency timing, or scope change that pushes it there.
What moves the number up or down
Final pricing usually changes for one of four reasons: access, material grade, code-driven add-ons, or bundled work discovered after diagnosis. A clean quote should spell out which of those is driving the difference instead of hiding it behind vague line items.
Detailed breakdown
Ironclad price: $175 | Austin range: $100–$275
You smell sewer gas coming from a drain — a floor drain, a shower, a sink you don’t use often, or a laundry drain. The P-trap (the curved section of pipe under or near the drain) either has a leak, is cracked, or has dried out. The P-trap holds a small amount of water that creates a seal blocking sewer gas from entering your house. When that water evaporates (from disuse) or the trap is physically damaged, the gas comes through.
Where your $175 goes at Ironclad:
You pay: $175.00
Credit card processing: - $5.25
Net to company: $169.75
Materials (P-trap assembly,
washers, slip nuts): - $12 (7%)
Technician labor (30 min): - $28 (16%)
Truck / drive / dispatch: - $55 (32%)
Overhead: - $40 (24%)
Company profit: $34.75 (20%)
What makes it cost more than $175:
- The P-trap is behind a wall or in the slab. Under-sink traps are accessible. Floor drain traps in a slab are not. If the trap is embedded in concrete and cracked, fixing it may require cutting the slab: ~$500-$1,000+. This is rare but possible in older homes.
- The drain line downstream has a problem. If the P-trap is fine but you still smell sewer gas, the issue may be a broken vent pipe in the attic, a cracked drain line in the wall, or a missing trap elsewhere in the system. Diagnosis gets more complex: ~$275-$400 for investigation.
What makes it cost less than $175:
Probably nothing if you’re calling a plumber. The parts are $10-$15 but the minimum cost of getting a licensed tech to your house is ~$125-$150.
Can you fix this yourself? If the smell is coming from a drain you don’t use often (guest bathroom sink, basement floor drain, laundry standpipe), try this first: pour a cup of water down the drain. That refills the P-trap and recreates the seal. If the smell stops within an hour, the trap was just dry. Run water through unused drains once a month to prevent this. Cost: $0.
If pouring water down the drain doesn’t fix the smell, the trap is physically damaged or the problem is somewhere else in the drain/vent system. That’s when you call.
Sewer gas is not just unpleasant, it’s a health concern. Sewer gas contains methane and hydrogen sulfide. Short exposure causes headaches and nausea. Prolonged exposure in a confined space is dangerous. If you smell sewer gas, address it. Don’t just “get used to it.”
How to compare this quote
Use this checklist before you approve the work:
- Does the scope clearly match drain smell coming from floor or shower or is the company quietly selling a bigger job?
- Are they showing why the quote is above Over $350 with photos, test results, or code notes?
- Are disposal, permit, restoration, and emergency premiums separated so you can see what is real and what is markup?
- If another option exists, did they quote it side by side instead of forcing one path?
If the answer is no, step back and compare against the full Austin plumbing price guide before approving anything.