My grinder pump alarm is going off — what do I do?

A grinder pump sits in a buried tank on your property, grinds what the house sends it, and pumps it into a small pressure main. The alarm means the level in that tank has risen above where the pump normally keeps it. Environment One (E/One), a widely used grinder-pump maker, puts the response in four steps:

1. Press the silence button under the alarm panel. The sound stops; the red light stays on — that is normal.
2. Stop putting water into the system: no laundry, no dishwasher, no showers or baths, and flush only when you have to. E/One says the tank has about 24 hours of storage, depending on use.
3. Wait an hour, then look at the light. If it is off, the pump caught up and nothing more is needed tonight.
4. If the light is still on after an hour, call whoever maintains the system (the next section covers how to find out) and give your name, address and phone number. Keep water use to a minimum until it is fixed.

E/One's guide is blunt: do not attempt to repair the unit yourself. It is a pump, a float switch and a control panel wired to a dedicated circuit, sitting in sewage.

• Don't open the tank lid, walk on it or put weight on it — E/One notes the lid is plastic — and don't touch the valves.
• Don't keep cycling the breaker to make the alarm stop. That silences the warning without fixing the cause, and it is the kind of repair attempt the manufacturer says to leave alone.
• Don't run the washer or dishwasher "just once" — a single laundry load can be the difference between a tank that holds and one that backs up into the lowest drain in the house.
• Don't flush what grinds badly: E/One's list includes wipes of any kind, sanitary products, diapers, rags, grease and cooking oil, kitty litter, sand, coffee grounds, seafood shells, plastic, glass and metal. "Flushable" only means a wipe fits through the pipe.

It varies, and it is worth knowing before the alarm sounds. E/One's own answer is that ownership and responsibility differ from place to place and that the local sewer department is who to ask. In practice there are three possibilities: the utility owns and services the pump, the homeowners' or condominium association does, or the homeowner does. The document that settles it is not a neighbour's memory.

• Check your closing papers and the community's declaration for grinder pumps, lift stations or the sewer connection; the HOA responsibility guide explains how Florida's condominium and HOA statutes leave the line-drawing to those documents.
• Ask the association or property manager whether they hold a service contract for the pumps.
• Ask Manatee County Utilities whether your address is served through a county-maintained pump; its Wastewater Division takes sewer calls at 941-792-8811, ext. 5411.
• Look on and around the alarm panel for a service sticker or phone number, and keep the owner's guide with it.

When sewage is coming up into a tub, shower or floor drain; when the alarm light stays on past an hour and you cannot stop using water (one bathroom, someone who needs it); when there are wet spots or a sewage smell around the tank or the discharge pipe with no recent rain — E/One says the unit and pipe are sealed, so wet ground means a leak; or when the alarm sounds at a neighbour's house and they are away, in which case E/One says to call it in rather than investigate.

Two alarms that are usually not emergencies: one after a power cut, which E/One calls a nuisance alarm while the pump pumps the tank down, and one after a big tub drains. If either clears within the hour, note it and move on; if alarms keep coming during ordinary use, or every time it rains (rainwater getting in), the system needs a service visit.