The setup
Imagine a small dental practice that leases a ground-floor suite in a low-rise office building near US 36. The suite was a different dental office before. The new tenant notices a faint sewer smell in one treatment room, mostly on Monday mornings and after holidays. Staff think it may be the building. The landlord thinks it may be the sinks.
Nothing about the smell seems dangerous, no one has symptoms, and there is no gas smell. That rules out an immediate safety response, so the tenant begins investigating in a calm order.
How the investigation might go
Illustrative example. Not a real job or customer.
A sewer smell appears in treatment room three on Monday mornings and fades by afternoon.
- The office manager starts an odor log and notes the pattern is worst after long closures.
- Staff refill every sink and floor drain in the suite. The smell is slightly better in most rooms but returns in room three by the next Monday.
- A plumber hired by the tenant, with the landlord's permission, checks the room and finds an old floor drain under a cabinet that was never connected to anything the practice uses.
- The drain trap is dry, and the line does not appear to have been capped or primed.
- The plumber and landlord discuss whether the drain can be abandoned properly or fitted with a primer, and the landlord approves the repair under the lease repair clause.
After the hidden drain is addressed, the Monday smell stops. The practice keeps refilling the remaining traps on a schedule and records the repair date in its log.
What this scenario illustrates
- A smell tied to long closures often points to dry traps
- A previous tenant's fixtures can remain hidden behind casework
- Plumbing is checked before any air treatment is considered
- Written repair requests make landlord responsibility easier to discuss
- Clinical rules for infection control are separate and handled by the practice
Questions a real tenant could borrow
- For the landlord
- Were any fixtures from the earlier tenant capped, primed or abandoned?
- For a plumber
- Can drains be mapped and is a trap primer appropriate here?
- For staff
- Which rooms are unused for several days at a time?
- For the lease
- Who is responsible for plumbing serving only this suite?
Common questions
- Is this a real case?
- No. It is an invented illustration and does not describe actual work, a real clinic or a real building.
- Would every sewer smell turn out to be a dry drain?
- No. Dry traps are common, but cracked lines, vent problems and failed seals also cause sewer smells.
General information for Westminster, not a quote or professional advice. In an emergency, call 911.