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Tanks & Treatment Plant - Installation

This section provides answers to many frequently asked questions.

What is a percolation test and who carries it out?

A percolation test is a method of assessing how much water can drain away through your plot’s subsoil (a subsoil porosity test). It is performed by excavating a small area and monitoring the time taken for the water to drop in minutes per inch. We strongly advise that an experienced site evaluator carries out the test, but instructions can be downloaded at How to perform a Percolation Test.

Where can I discharge to?

Every location has its own characteristics and hence there can be either many discharge options, or none at all. Popular options include soakaways, drainage ditches or discharging to streams, rivers & watercourses. Again, it is important to remember that what is judged acceptable to the authorities in one location can be turned down by another, so the first step is always to consult your local Regulatory Body.

Comprehensive advice on off-mains drainage is available at ask.klargester.com

Can I install it myself or can someone do all this for me?

Any Klargester foul-water product can be a DIY installation as full instructions are supplied with each unit. However, we do recommend you use one of our Certified Installers to carry out your works to ensure a hassle-free, expert job.

Can I connect surface water into the plant?

No – Surface water cannot enter a treatment plant and must be drained away separately.

Can I use the discharged water?

Can I use the discharged water? Klargester does not recommend the discharged water be used for any purpose. The water exiting a treatment plant remains wastewater and should be disposed of as such.

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