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Consumer Information

Your septic system is a biological system which can effectively treat and disperse your household sewage and other organic wastes. Properly designed, installed and maintained it will give you many years of service.

A septic system is designed to condition untreated household sewage so that it can be readily dispersed and percolated into the soil. Percolation through the soil accomplishes the final stage of purification of effluent liquid from the septic tank.

A septic tank is the first step in the process of sewage breakdown.  Without it, the sewage would clog the receiving soil and prevent effluent from leaching into the soil causing system failure.

The Do’s and Don’ts:



Have your tank pumped out every year or two.  This will prolong the life of your septic system.

Wait to pump your tank until there is a problem; by then it may be too late.

Know the location of your tank.

Use a garbage disposal with a septic system: no grease, oils, food, etc.

Check your system for failure.
(wet areas, bad odor, slow drains)

Flush cleaning products into the septic tank: bleach, solvents, drain openers, paint thinner, chlorine, etc.

Conserve water.

Park vehicles on leach field: no pools, structures, tall grass, brush, trees, etc.

Install a filter on the outgoing pipe in your septic tank.

Use colored toilet paper (white only).

Install risers and covers on the center cover and outlet cover of the septic tank to pump tank and service filter.

Add commercial additives, bacteria, or enzymes to your system.

Pump the tank from the center cover only.

Be pennywise and dollar foolish,


Septic Tanks

Your septic tank must be pumped out on a regular basis to prolong the life of your septic system; we also recommend installing a Tee Baffle with a filter on the outgoing pipe in the septic tank to keep solids from entering your septic system causing failure and major expense. Your tank should have risers and covers on the center cover of the tank for pumping and an outlet cover for servicing the filter (no more digging). The diagram below shows a typical 1,000 gallon septic tank with concrete Baffles that span the tank side to side with a small opening in the center for venting.  Solids floating can get so thick that they become buoyant and start gaining in elevation vertically and escape over the Baffle through the small opening and out the pipe to the D-box.  This is why a Tee Baffle and filter should be installed and the tank pumped out every one or two years.

When your tank is pumped, it is important that all of the solids are removed, and if the sludge on the bottom of the tank is thick, it must be back flushed to loosen it and then be re-pumped to do a good job.  We do this when we pump tanks at no extra charge.

We also look for broken Baffles, clogged or partially blocked inlet pipes, things that should not be flushed, etc. This would be noted on the invoice for future repair or discussion.  If your tank has no Tee Baffle, one should be installed with a filter.

NOTE:  Some of the above information on this page was provided by the NH Water Supply & Pollution Control Commission


We are a full service company.
If it has to do with sewer or drains we can do it and get it done fast.

Granite State Sewer & Drain Cleaning Company • 4 Candy Lane, Unit #6 • Hudson, NH 03051
mailing address: P.O. Box 313 • Londonderry, NH 03053
Office:  603-434-7213  • Fax: 603-434-8445