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The rising odors in the kitchen or bathroom are unpleasant, but also unhealthy. We often wonder about their origin. Here are 5 questions on the subject.

5 questions about septic tanks

The main component of a non-collective sanitation system, the septic tank is essential when it is not possible to connect to the sewer system. However, it is an equipment that can pose some problems. The turn of the matter in five points.

Can we turn a septic tank into a water tank?

As part of the connection of a house to the public sewerage network, the septic tank of 3 m3 must be sentenced. Is it possible to turn it into a water recuperator, and if so, how should it proceed?

In theory, a septic tank can be used as a cistern, provided that the rainwater recovered is reserved for specific uses as'spray where the floor washingor evensupply of toilet bowls
It must first be rinsed by a specialized company and provide for a sump for the overflow. A system of water manager will be necessary if it serves for a Domestic use in the house (excluding any sanitary use, such as washing dishes and, of course, personal hygiene).

How to remove odors septic tank?

The septic tank of a house has been replaced by a septic tank all waters. Since then, there is still a smell of sewage outside the house. What is it due to? What to do?

The odors of septic tanks come mostly from the system of primary ventilation the big gray water drain, and therefore the pit. This ventilation, to precisely avoid these odors, is located very high (at 40 cm above the ridge of the roof). It is possible that the exit is too low, or that the prevailing winds in the region reduce these odors towards the ground.
If the output is high enough and the problem persists, the installation of a static extractor should solve (at least partially) this problem.

What should be the volume of a standard septic tank?

According to a company that intervened on the septic tank of a house not connected to the mains drainage, the pit would be built only for the toilets (it is 1m3). Does this installation comply with the standards in force? What volume should she do?

Only municipalities with more than 2000 inhabitants are required to be connected to a sewage treatment system. If there is no sewage system, there is an obligation to have a non-collective sanitation system individual standards. The septic tank is the most classic of these systems.

In the case of a newly purchased house, the vendor had to have the pit quality checked and a diagnostic "water purification". If the installation was not in conformity, he was informed and had to carry out the restoration before the sale (question the notary).

Law No. 2006-1772 of 30 December 2006 on water and aquatic environments requires that the sanitation facility be maintained "in good working order by the owners". In addition, municipalities must carry out inspections of non-collective sanitation facilities by its services or those of the Public Non-Collective Sanitation Service (SPANC), every 8 years at most. We must agree as soon as possible with this regulation and eventually turn against the seller. It is possible to ask the municipality or the SPANC to make a conformity check or wait for their passage.
As for the volume of the pit, it depends on the number of people living at home and the number of rooms in the house.

Who must upgrade a septic tank in a building?

A house was divided into three apartments, one of which was in the attic. In the case of this apartment, the sanitation system must be brought up to standard. The greywater arrives in the septic tank and the owner of the lower housing refuses to contribute to the cost of additional work during the refurbishment. What should be done? Can we turn against the seller for improper work?

The upgrading of sanitation is a obligation before the sale. If the sewage from all apartments goes to the septic tank, it is likely that the entire building is concerned. The upgrade would then be global and it would be a case of co-ownership.
However, if the attic apartment is the only one concerned, then it will be up to the homeowner to pay the compliance.

Like remaking the non-collective sanitation system of a villa?

The drain of non-collective sanitation of a villa is clogged. Should we redo the whole system? Is it better to create a sewage lifting station or put a new septic tank with a new drain?

If the drain of pit spreading system is clogged, it will indeed have to be unblocked. The use of a specialized company is practically the only solution. Once this is done, the pit can be put back into service normally. It will not be necessary to create a second system since the first will be restored.

Warning: when it is possible to connect to the mains drainage, this connection is mandatory! If this is the case, you do not need to pay for the rehabilitation of a septic tank that will be sentenced.

How to regulate pipe odors?

After the delivery of a house 18 months ago, built with an architect's contract, we see the smell of pipes while we are in the sewer. A plumber placed a membrane aerator in the washbasin of the bathroom. Is it mandatory to install vents? What are the remedies to compel the builder or plumber to do this work?

It all depends on what the plumber calls a "vent". One thing is certain, the DTU (unified technical document) which lays down the rules of the art in the field of construction, imposes what is called a primary ventilation (DTU 60.11) of the wastewater drainage pipe to avoid the defusing of siphons, with exit on the roof. The "architect's contract" in question is probably a project management contract. As such, he owes usable installation normally and without odor problems. We must turn to the project manager, so that he finds a solution to the problem. The house is in its second year and so again as part of the biennial guarantee (perfect functioning) and it can be assigned as such, the sanitary system can be considered as equipment within the scope of this guarantee. Warning: note that only an assignment via the Tribunal de Grande Instance suspends the limitation periods!

How to limit odors after uncoupling a pipe?

What is the solution to fight against foul odors in a shower, following the use of hydrochloric acid in the sewage pipe?

The fact of having used pure hydrochloric acid (which is not made to unclog the pipes) is perhaps no stranger to the odors noted, because this very powerful product has an action of decomposition on all debris which prevented a normal flow. You have to be patient, but also use this type of product (especially for the cleaning of the toilet bowl) with caution, because the acid can attack PVC joints and pipes. This being the case, make sure that the siphon of one of these devices (shower, bidet, washbasin, etc.) is not very used, is not defused (that is to say empty). By filling it (by running a little water), it is possible to prevent the return of odor coming from the sewage pipe.

How to avoid odors on a pipe with several siphons?

How to avoid odors when we have several siphons on a pipe? There is always one empty!

The defusing of siphons is most often caused by lack of primary ventilation on the network, ie a venting at the end of the network. If there is no ventilation opening into the roof, you must create one. Ideally it should lead to the roof, above any opening (skylight, roof window, etc.). It is not impossible to create one on the front. An air vent valve or "siphon valve" can be installed on the line.

How to remove odors septic tank?

The septic tank of a house has been replaced by a septic tank all waters. Since then, there is still a smell of sewage outside the house. What is it due to? What to do?

The odors of septic tanks come mostly from the system of primary ventilation the big gray water drain, and therefore the pit. This ventilation, to precisely avoid these odors, is located very high (at 40 cm above the ridge of the roof). It is possible that the exit is too low, or that the prevailing winds in the region reduce these odors towards the ground.
If the output is high enough and the problem persists, the installation of a static extractor should solve (at least partially) this problem.

How to fight against the return of odors by the washing machine?

The washing machine is in a bathroom with toilet and shower ("old adobe farmhouse"). Evacuations from the shower, toilet and washing machine drain well, the septic tank was recently emptied, but sometimes, depending on the weather changes, very powerful odors come out from inside the machine. wash. We resisted long to close the hood of the washing machine (it seems to me that this is not recommended for joints) but it is very annoying. If there is laundry inside this washer tub (door closed), odors are attached to it. A plumber has installed a room (unidentified) at the evacuation elbow, no result. What explanation? What to do?

Bacterial growth in the machine itself can occur when it is too often run at low temperatures. A machine can be deodorized by running it empty at 60° C with 5 liters of white vinegar. The same result is obtained with ten spoonfuls of citric acid.
Persistent odors can come from the sceptic tank. Apart from a specific problem in the pit, different ways (before considering heavy work) can avoid these odors:
- position on the exhaust pipe of the washing machine a check valve,
- to ensure primary ventilation (by tapping and evacuation on the roof) of the exhaust pipe,
- make a siphon with the PVC pipe of the evacuation.

On the same topic

  • DIY tips
    • How to unclog the tub with white vinegar?
    • Remove bad odors in the house
    • Set up a non-collective sanitation system
    • Wastewater collection: the connection to the public network
    • Traps for plumbing fixtures
    • Install a skeptic pit
    • How to install plumbing for a sink?
    • Water drainage pipes
    • Pipelines and water supply connections
    • Clogged drains
  • Questions answers
    • How to renovate a sewage pipe?
    • How to fight a sewer smell in a shower?
    • Is the replacement of lead pipes compulsory?
    • Moisture and odor problems in a windowless bathroom
    • How to repair a leak on a buried pipe?
    • What diameter for a connection of everything to the sewer?
    • How to manage the compliance of a sanitation network?
    • How to eliminate smoke odors with a VMC?
    • How to avoid rising odors from my bathtub?
    • Locate the connection to the mains drainage
    • Transform a septic tank into a rainwater collector

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