French Drains & Septic Tanks in Cape Town

 French Drains and Septic Tanks are very popular in the Cape Town Regions.

French drains  & septic tank systems  are one of the many Green services for sewage treatment.. We pride ourselves on our superb customer service and ever increasing technical knowledge in the green aspect of plumbing. Our commitment to our clients is second to none.Our staff can be your personal green plumbing department at home, at work, on the road- wherever you need professional assistance with your green plumbing. We are here when you need a professional, experienced and dependable technician plumbing knowledge on hand.Septic Tanks

French drains

French drains  are one of the most common sewerage waste treatment processes used here in Cape Town coupled with a septic tank, plastic or built. There are 2 types that we can accommodate this process for effluent. Brick built septic tanks and french drains are by far the most common on most agricultural holdings, depending on the soil porosity and the local municipality by laws.  Systems, like septic tanks and french drains have many variations – all based of course on the basic principle of waste treatment.

Brick built septic tanks or french drains

This type of septic tank or french drain only works properly for waste treatment when all factors are considered. Factors like soil porosity, location and what regulations were in place, if any when the tank was installed.A built system normally comprises of 2 chambers which allows the solids in the waste water to separate. The solids either float to the surface or goes to the bottom where the decomposition/treatment of micro-organisms takes place.

The remaining waste water would then be either run directly to a soak away/french drain. Many septic tanks have a filtration tank where the waste water filter before leaving the system into the french drain.

Plastic tanks

Polyrib septic tanks or Polyethinine are the norm of the modern day waste water treatment process.  Very convenient and build for this purpose. These septic tanks can be easily installed with minimal problems and can easily be connected to a french drain. There are no plastic alternatives for a french drain. Drain Ratz Plumbing Division are installers/repairers of septic tanks and french drains.

 What is a Reed Bed?

A reed bed is a channel lined with impermeable membrane that is filled with gabion stone, gravel and is planted with (macrophytes) like reeds, rushes and treats the grey /black water (waste water). Waste water is passed through the root zone of the reeds where it undergoes treatment. The inlet and outlet of the pipes are positioned below gravel surface so that the water always remains below the gravel surface, thus excluding human exposure to the waste water, mosquito breeding and unpleasant odors. Reed Beds are perfect for this.

How d Reed Beds work?

Treated effluent from the house is initially filtered prior to entering the reed beds through a filter. This effluent filter is fitted too the grey water collection tank or septic outlet pipe. After filtration of the large solids/floatables, the waste water undergoes many processes as it passes through the reed beds. The reed bed detains the waste water for at least 5-7 days. This detention period of the reed bed directly aids with the treatment by allowing time for the setting and filtering of  floatables. Nitrification of suspended solids takes place, fixation onto the substrate, breakdown of organic matter and nutrient removal via micro-organisms and plant uptake. (5-7 days for which the reed bed is designed for). The quality of the treated effluent improves with increased residence time.

Why install a Reed Bed?

In most cases where the local municipality does not allow for septic tank or french drain but only a conservancy  tank, it is best to install a reed bed. Most recommend option.  The use of a reed bed produces a secondary treated effluent that allows owners to better utilize their waste water than had it remained primary treated. Reed bed effluent can easily percolate into the soil because it has reduced BOD and suspended solids and poses less risk to human health. The local municipality may have previously given approval to install a septic tank with an absorption french drain within 100 meter radius but as knowledge increases about the on-site domestic or commercial sewerage, if it found that these systems treat the waste water to an acceptable standard only. If the absorption trench fails, it will be better to install a reed bed which will improve the quality of the septic tank effluent prior to land disposal. Installation of reed beds will also significantly reduce fecal coli forms /pathogen indicator.Reed beds can usually installed on sites on soil that does not allow for easy permeation – sand, clay, steep slopes, allowing the water to be treated to an acceptable standard prior to land application.

DrainRatz Plumbing Division is installers of Reed Beds. Get in touch today:

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