Description of common domestic use

Last updated on Tue, 11/13/2012 - 09:21

Resistance to domestic fluids

Building waste water drainage systems - grey and black water- must be able to withstand the types of domestic effluents specified by EN 877standard.

In recent years, however, changes have been noticed in the types of these fluids:

  • Higher concentration of household detergents,
  • Use of more aggressive hygiene products,
  • Rise in operating temperatures.

The constraints on sanitary drainage systems are constantly increasing.
SAINT-GOBAIN PAM coatings have been adapted to meet those constraints.

For conventional grey water, black water and rainwater applications.

For systems installed above ground, in ducts, raft foundations or included into concrete.

Characterisation of common domestic applications:

Standard requirements

  • Hot water resistance: 24 H at 95°C and thermal cycles (1500 cycles of 1min between 15 and 93°C)
  • Salt spray resistance:350 h
  • Chemical resistance: 2 >pH > 12 at 23°C

To test the chemical resistance of cast iron products standard EN 877 defines that product samples shall be immersed - for 30 days and held at (23 + 3)°C, the pH being constantly monitored - in the following test liquids:

  1. a solution of sulfuric acid at pH 2, for the first sample;
  2. a solution of sodium hydroxide at pH 12, for the second sample.
  3. a solution of waste water at pH 7 for the third sample. 

To provide clearer guidance on the chemical resistance of S range in domestic applications, SAINT-GOBAIN PAM has carried out 20 additional tests.