Page 15 - INCOLA EXCLUSIVE DATA CATALOGUE

INCOLA Soundproof Piping Systems

2.4 Sound Regulations

• DIN 4109 Sound Insulation in Building Construction
• VDI 4100 Sound Safety in Houses - Criteria for Planning and Evaluation
• EN 14366 Laboratory Measurement of Noise from Wastewater Installations

2.4.1 DIN 4109 - Sound Insulation in Buildings

DIN 4109 standard targets mainly preventing disturbances caused by sound
transmissions in the environment. Sound safety levels are applied to protect
people from unhealthy levels of noise.

The upper limit of sound safety for domestic water systems should be 30 dB(A). On the other hand,
DIN 4109 defines the maximum permissible sound pressure as 35 dB(A) (for wastewater,
plumbing, and heating systems).

2.4.1.1 DIN 4109 Permissible Sound Pressure Level

Types of Rooms to be Protected
Noise Source
Living Rooms and Bedrooms Classrooms and Offices
Water Supply and Wastewater Systems ≤ 35¹ ≤ 35¹
Other Household Systems ≤ 30² ≤ 35²
Enterprises working 6am-10pm ≤ 35 ≤ 35²
Enterprises working 10pm-6am ≤ 25 ≤ 35²

Table 5. Permissible Sound Pressure Level in accordance with DIN 4109
1 When using taps or appliances, sporadic loud noises are ignorable.
2 Continuous and barely discernible single-toned noise of 5 dB (A) or less is allowed in air conditioning systems. User created noises such as closing a
closet door or a shower panel, or placing a toothbrush glass, are not considered.

2.4.1.2 Types of Rooms to be Protected in accordance with DIN 4109 Norm

• Living rooms and bedrooms
• Hotel rooms and hospital rooms
• Clinic rooms, meeting rooms, small and medium-sized offices, study rooms, etc.

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