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Question DetailsAsked on 12/4/2015

Constant dribble of water from INLET PIPE into Septic Tank.

Food coloring both toilets..No Leak. All faucets..No Leak.Showers,Washer and leak. Septic Tank drained yesterday ..No Problems..Dribble coming ONLY from INLET PIPE from the house. Used no water last night..came out this morning (10 hours) still dribbling...Where can this br coming from...HELP.

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1 Answer


Here is a response to a basically identical question - with a link to another response within it - which pretty much says all I can about it -

If your water bill has not gone up (if billed by usage) and your leach field is not getting oversaturated, if just a trickle I would not worry about it.

If you decide you want it looked at, two alternatives for first step -

1) get a sewer cleaning contractor with a sewer camera in to run through the drain pipe to see if there is water running into it from the house or from the ground through a crack or joint

2) get a civill engineer who is septic system certified to come in and investigate - which would probably be initially by some shallow boring to survey the groundwater elevation in several holes and see if coming from groundwater, leach field, or water pipe break.

Two possible sources I don't remember if I mentioned before, but stethoscope on water pipes would certainly track down by sound - are sump pumps/foundation drainage systems, and trickle feed systems to rarely used traps in the drain - like some floor drains, especially ones under washing machines. They use a small trickle feed (commonly through 1/8 or 1/4" tubing off a very small valve on a water line) to maintain a small flow into a trap so it cannot go dry and release sewer gases.

Couple of other possible sources - drainage from air conditioner evaporator tray, dehumidifier draining to a drain (portable or built-in on furnace), backflushing water from a water treatment system or from a leaking backflush valve on such.

Another thing - on the food coloring test in toilets - if you only slightly colored the water in the tank that does not show in the bowl always if the flow is quite low - has to be pretty strong color in the water to show at a minor trickle spread out around the rim of the bowl. Alternative method - turn off water to the tank overnight and see if it drains down (provided valve turns it totally off so fill valve never operates - or if leaking a bit or afraid the shutoff valve is too corroded to safely use, block/tie the float up so the fill float valve will not operate.

Answered 4 years ago by LCD

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