Floor Drain Backing Up
A basement floor drain is normally the lowest opening in the house, which makes it the first place a main line blockage shows itself. If yours is backing up, treat it as a main line problem rather than a floor drain problem.
What to do right now
Do these first. None of them need tools or plumbing knowledge, and they limit what this ends up costing you.
Stop and get out if any of these are true
Sewage in living space is a biohazard, not just a mess. Keep children and pets out, do not run fans that blow across it, and do not attempt to clean it yourself without gloves, eye protection and a mask.
- Stop using water everywhere in the houseEvery flush, shower and washing machine cycle adds to a blockage that already has nowhere to go. It comes back up at the lowest fixture. Stop using water entirely until the line is clear.
- Move what water can ruinLift boxes, rugs, electronics and anything sitting on a basement floor. Most of the cost of a plumbing emergency is damage to belongings rather than the repair itself.
- Photograph everything before you clean upPhotos and a short video of the water, the source and every damaged item. If you claim on insurance this is the evidence, and it cannot be recreated once the area is dry.
Does this need a plumber tonight?
- Sewage coming up through the floor drain
- Backup that rises when other fixtures are used
- Water spreading across a basement floor
- Foul smell with the backup
- A dry floor drain that smells, which is usually an evaporated trap
- A drain that is slow but takes water away
Why it is the first to go
Because water finds the lowest opening. Everything in the house drains into the main line, and when that line is obstructed the contents come back up wherever the level reaches first.
In most older Ogden homes with a full basement, that is the floor drain by a comfortable margin. It sits lower than every fixture and it has no trap seal high enough to resist.
The practical consequence is that a floor drain backup is an early warning rather than a minor problem. Acting on it before the level rises further is usually the difference between a wet floor and a flooded one.
The smell without the backup
A floor drain that smells but takes water fine usually has a dry trap. The water seal in the trap has evaporated and sewer gas is coming up through it.
It is a genuine nuisance rather than an emergency and the fix is free: pour a bucket of water into the drain to refill the trap. In a basement that is rarely used, doing this every couple of months prevents it entirely.
A little mineral oil on top of the water slows evaporation further, which is worth doing in a drain that is almost never used.
What this costs
[PLACEHOLDER: PRICING] Pending from the client.
Priced as main line work when it is a blockage. A dry trap costs nothing and we will tell you that on the phone rather than attending.
Questions people ask about this
My floor drain smells but drains fine.
Almost certainly an evaporated trap. Pour a bucket of water down it. If the smell goes, that was it, and no visit is needed.
Should I put a cover on it?
Not a sealed one. The floor drain is a designed relief point, and sealing it means the next backup finds a different and worse place to appear.
Is the water coming up sewage?
If the blockage is in the main line, yes, and it should be treated as contamination rather than as water.
If that is not quite what you have
Not sure how urgent this is?
Describe what you can see and hear. We will tell you whether it needs someone tonight, and what to do in the meantime either way.
Or send it over
Four things and a photo.