Sewage Ejection Pump Maintenance and Reporting

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A visual inspection of a sewage ejector pump system is typically limited unless there are accessible service records, written documentation, or apparent signs of malfunction (such as noise, odor, or leaks).

Below is a breakdown of a sewage ejector pump’s maintenance schedules, standard components, and inspection considerations.

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Download Sample Inspection Protocol.

Service and Maintenance Frequency:

  • General Pump Maintenance: Every 3 to 5 years under regular use. This includes inspecting and servicing the pump, float switch, and pit to ensure they’re clean and debris-free.
  • Heavy Use: Consider annual maintenance if the pump handles a large volume of waste (e.g., in homes with multiple bathrooms draining to the pump).
  • Power Outage Backups: If your area has frequent power outages, you may need to check the backup system (if installed) more frequently (e.g., every 6 months).

Pump Lifespan:

  • A well-maintained sewage ejector pump typically lasts 7 to 10 years, although some high-quality systems can last up to 15 years.

Key Components to Inspect and Service:

1. Pump Motor:

  • Purpose: Pumps wastewater up to the sewer line.
  • Service Check: Listen for unusual grinding or whining noises, which indicate potential motor issues.

2. Float Switch:

  • Purpose: Detects the water level in the pit and activates the pump.
  • Service Check: Ensure the float is not stuck due to grease or debris.
  • Maintenance Tip: Check for buoyancy and free movement to avoid false triggers.

3. Check Valve:

  • Purpose: Prevents wastewater from flowing back into the pit after pumping.
  • Service Check: Listen for “water hammer” noises—these could indicate the check valve is not sealing properly.
  • Lifespan: Typically lasts 5–7 years but may need replacement sooner if noises occur.

4. Pit and Lid:

  • Purpose: Houses the pump and seals the system to prevent odors and gas escape.
  • Service Check: Check for cracks or poorly fitted lids that can lead to odor leaks or sewer gas exposure.

Inspection Considerations During Visual Inspections:

  1. Access to Written Records:
    • Check for any maintenance logs or stickers indicating service dates.
    • Ask homeowners if they have records from plumbers or contractors.
  2. Visible Signs of Poor Performance:
    • Odor of sewage near the ejector pit.
    • Water stains around the pit can indicate overflow.
    • An audible alarm is typically installed if the pump system has a backup notification. Note the alarm horn or mechanism.
  3. Homeowner Inquiries:
    • Ask if the pump has failed before and whether they’ve noticed frequent cycling (indicates an issue with the float or check valve). Ask for records.
    • Inquire about power backup—many systems have battery or generator backup for power outages. Locate the battery storage area and wiring.

Red Flags in Inspection Reports:

  • No backup power source: A home relying solely on municipal electricity is vulnerable to pump failure during an outage.
  • No recent maintenance records: If service has not been performed within 5 years, recommend having a licensed plumber inspect and service the pump.
  • Evidence of sump pit debris: Items like grease, hair, or foreign materials can clog the float and affect performance.

Frequently Asked Questions

Without a backup system, avoid using water that drains into the pump. If the basin fills, it may overflow. A battery or generator backup can prevent this.

With proper maintenance, a grinder pump typically lasts 8–15 years. Regular inspections can extend its lifespan.

Here is a short list of the signs your grinder pump may be failing. For best advice, contact a qualified licensed plumbing contractor.
🔹Frequent alarm activations.
🔹Unusual noises like grinding or humming.
🔹Slow drainage or backflow in fixtures.
🔹Odors around the pump basin or vents.

Grinder pumps are designed to handle wastewater and small solids. Items like wipes (even “flushable” ones), feminine hygiene products, grease, and non-biodegradable materials can clog or damage the system.

The frequency depends on household usage. For a single-family home, the pump may cycle several times per day. Excessive cycling might indicate a problem like a faulty float switch or water infiltration into the basin.

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