Polluted drinking water? How good is a renovation of the pipes with epoxy really?


German drinking water has only received top marks from the Federal Environment Agency for years. However, experts consider the limits set for microbiological and chemical pollution to be too low. Some experts warn against exposure to the chemical bisphenol A, which can enter the pipes as a result of the renovation with epoxy resin.

Renovation of the water pipes with epoxy resin

For several years, the plumbers and reboiler recommend their customers rather than an exchange of ailing water pipes, rather a renovation with epoxy resin from the inside. This is the simplest and cheapest method, because in the end, floors and walls do not have to be torn open everywhere to replace old pipes.

The epoxy resin has been used by the Union of pipe restorers since 1987 and should be completely non-toxic. But now more and more experts warn of a load of drinking water through this process. Even some water companies have already banned the process in their region.

Federal Environment Agency

The Federal Environment Agency has made a list of the resins used for pipe rehabilitation. However, none of the epoxy resins is listed there as absolutely harmless for use in the field of drinking water pipes. Therefore, the industry association DVGW has even distanced itself from the process and does not recommend this type of renovation to its members.

Homeowners Association sees the renovation critical

The homeowners' association Haus und Grund has also already warned its members against a renovation of the drinking water pipe with epoxy resin. The association is of the opinion that the homeowner must fear through a reorganization claims for damages and even pain and suffering by the tenants. Some courts have already decided in favor of the tenants.

Hot water pipes more affected

Bisphenol A is often contained in the resin with which the drinking water pipes have been lined from the inside in recent decades. In many houses, this substance has now been discovered in drinking water, especially in the hot water pipes. Apparently, the poison is dissolved out of the epoxy resin by the warm water.

How does bisphenol A get into drinking water?

  • poor preparatory work
  • Remains of rust in the pipe
  • Coating with epoxy resin inferior
  • Drying time or curing phase too short
  • Epoxy resin incorrectly mixed or poorly dosed

Problem of bisphenol A

Bisphenol A has been banned in baby bottles. This is certainly not a good sign, because who wants to use a safe baby bottle, but the baby then prepare a tea with this tap water?

  • hormonal active ingredient
  • Fertility problems in men
  • Studies point to diabetes and heart problems caused by bisphenol A.
  • Animal experiments detect tumors and growth disorders

Tips & Tricks

Better bite into the sour apple and replace damaged or broken pipes when they are used for drinking water. Such a refurbishment with epoxy resin should only be used for sewage pipes.


Video Board: Industrial Sewage For areas subject to excessive corrosion 工業污水-重度防腐蝕