Frequently asked questions

Every three to five years for a typical household, but it depends on tank size and occupancy. Two people on a large tank can go longer; six people on a small one cannot.

No. Pumping empties the tank, which can relieve a backup temporarily, but if the field has failed the tank refills and the problem returns within weeks. Anyone promising otherwise is selling you a pump-out you will need again shortly.

There is no good evidence for that. Solids still accumulate and still have to be physically removed.

An inspection that includes opening the tank, checking the baffles and filter, and assessing whether the field still accepts water. Guessing from the symptom is how people end up paying for a new system they did not need.

Usually not for wear and failure, sometimes for sudden accidental damage. Check your policy before assuming either way.

Yes. Subsurface sewage disposal systems are permitted through the state Division of Water Resources, and the work is inspected before it is covered.

A well-maintained conventional system commonly runs 20 to 40 years. Pumping interval and what goes down the drains matter more than age alone.

Only within what the soil evaluation allows. The field goes where the ground will accept the water, which is not always where it is convenient.

Sometimes, if it is clogged rather than collapsed. Resting it, correcting the cause and in some cases fracturing or jetting the lines can help. A field that has failed structurally has to be rebuilt.

It depends entirely on soil and household size. Some properties have room for a replacement area and some do not, which is worth knowing before you buy.

No. Standard home inspections exclude the septic system. It is a separate inspection by someone who works on septic.

It usually means a negotiation rather than a dead deal, but the cost of what it uncovers can be substantial. Better to know before closing than after.

Stop using water in the house, including the washing machine and dishwasher. Every gallon that goes down adds to what is already backing up. Keep people and pets away from any surfaced effluent.

Yes. Treat it as contaminated, keep children and animals off it, and do not mow it.