Sewage Ejector Pump Repair in Sausalito: Hillside Homes and Storms
Many Sausalito homes step down the hillside, so the lower-level bathroom or laundry sits below the sewer and relies on an ejector pump. Here's how they fail in storm season and what to do about it.
Sausalito homes are built into the hill. A lot of them step down from the street, which puts the lower-level bathroom, laundry or in-law unit below the sewer line it has to drain into. Those fixtures depend on a sewage ejector pump to lift wastewater up to the sewer. When it fails, usually in the middle of a storm, the downstairs toilet or shower backs up. If your ejector alarm is going off or the lower level smells like sewer, call or text Local Plumbing at (415) 234-0370. You can also read more on our ejector pump page.
Ejector Pump or Sump Pump?
They look similar, but they do different jobs:
- A sewage ejector pump handles wastewater from toilets, showers, sinks and washing machines on a level below the sewer, and pumps it up into the sewer line.
- A sump pump handles groundwater and storm water that collect around a foundation, and pumps it away to a drainage point outside.
If you're not sure which one you have, look at the basin. A sealed lid with a vent pipe coming out of it is almost always an ejector. Some Sausalito homes have both. For the sump side, see our guide to sump pump replacement before storm season.
Why So Many Sausalito Homes Have One
- Homes that step down the hill. In Old Town, Hurricane Gulch and up toward Wolfback Ridge, the street (and the sewer in it) is often above the lowest floor. Anything plumbed on that floor has to be pumped up.
- Lower-level remodels. A downstairs bathroom, a laundry room or an in-law unit added years after the house was built usually means an ejector was added too, sometimes a small one sized for a single toilet that now serves a full bathroom and a washer.
- Tight spaces. Ejector basins end up under stairs, in closets and in crawlspaces. That makes them easy to forget about until the alarm goes off.
How Storm Season Causes Ejector Problems
Power outages
An ejector pump needs electricity. When the power goes out in a storm, the pump stops, but the basin keeps filling every time someone flushes or runs water on that level. Once it's full, the next flush comes back up through the lowest drain.
Heavy rain and the sewer main
In long storms, rain and groundwater find their way into sewer pipes, and the system can run very full. If the check valve on your ejector's discharge line is worn, sewage can drain back into the basin, and the pump runs over and over pumping the same water.
Groundwater getting into the basin
An older basin with a cracked lid seal or a leaking pipe entry can let groundwater in during wet weather. The pump runs far more than it should and wears out early.
Warning Signs
- The high-water alarm sounds, even briefly
- The pump runs constantly or turns on and off every few minutes
- A humming sound but no pumping, often a jammed impeller or a failed motor
- Sewer smell on the lower level, often from a lid seal or vent problem
- Gurgling or slow drains in the downstairs bathroom or laundry
- A tripped breaker or GFCI on the pump circuit
- A loud bang when the pump shuts off, often a failed check valve
What We Check and Fix
On an ejector call we work from the simple causes to the expensive ones:
- Power and controls. Breaker, outlet, float switch and alarm.
- The pump. Is it starting, moving water and shutting off? Jammed impellers are common. Wipes, even ones sold as "flushable", are the usual cause.
- The check valve and discharge line. Does sewage stay up in the line when the pump stops, or drain back?
- The basin. Lid seal, vent, and any sign of groundwater getting in.
Repairs are often a float switch, a check valve or clearing a jam. Replacement makes sense when the motor has failed, the pump is undersized for what's now plumbed into it, or it's old and has started tripping breakers. We install sewage ejector pumps from brands like Zoeller and Liberty Pumps, matched to the fixtures they serve and how high they have to lift. For homes with an in-law unit or heavy use, a duplex system with two pumps and an alternating control means one pump can fail without the bathroom going out of service.
Planning for Outages
Battery backup is a common add-on for sump pumps, but it's harder for sewage ejectors, which draw more power. For most homes, the practical protection is:
- A battery-powered high-water alarm, so you hear about a full basin before it overflows
- A house rule: during an outage, don't use the lower-level toilet, shower or washer. In most homes the upper floors drain by gravity and keep working.
- For homes with an in-law unit or a lower level that's lived in full time, a generator connection installed by an electrician, so the pump can run during a long outage
Sausalito Ejector Pump FAQs
Why does my ejector alarm go off when it rains?
Usually because the pump can't keep up, or the basin is filling from something other than your fixtures, such as sewage draining back through a worn check valve or groundwater leaking into the basin. A pump that's failing will also trip the alarm. It's worth a service call before the next storm.
Can I use my downstairs bathroom when the power is out?
Not if it drains to an ejector pump. Without power, each use fills the basin until it overflows at the lowest drain. Upstairs fixtures that drain by gravity are usually fine.
How long do sewage ejector pumps last?
It depends on how hard they work. A pump serving one occasionally used bathroom can last many years. One serving a full in-law unit, or one that's been pumping groundwater, wears out much sooner. We'll look at the pump, the basin and how often it runs.
Is an ejector pump the same as a grinder pump?
Not quite. A standard ejector pump passes solids up to a certain size. A grinder pump chops waste before pumping, which suits long or high discharge runs. Which one you need depends on how far and how high the wastewater has to go.
Ejector Pump Service in Sausalito, Marin City, Mill Valley and Tiburon
Local Plumbing works on sewage ejector and sump pumps across Marin and Sonoma counties, from our warehouse and training facility in San Rafael. We're a licensed contractor (Lic #1091739). Learn more on our ejector pump page, or read our ejector pump explainer for lower-level bathrooms.
Alarm going off, or want your ejector checked before the next atmospheric river? Call or text (415) 234-0370, or contact us to book a visit.
