Application purpose:
- For non-ventilated sewer risers
- To reduce the likelihood of a hydraulic seal failure in sanitary appliances
- To prevent sewer air from entering the premises
Characteristics:
- the body is made of PP (double wall thermally insulated), and the membrane is made of rubber;
- equipped with adapter for DN 50/75;
- there is a special removable insect net;
- mounted vertically, located in the upper part of the riser (the valve must be located above the connection point of the highest floor outlet - at least 300 mm);
- installation in residential premises is possible;
- corresponds to GOST 23289-94;
- operation is possible at temperatures from -50°С to +100°С;
- warranty period: 1 year;
- service life: 50 years.
Equipment:
- a special insect net;
- heat-insulated wall;
- rubber membrane.
Produced in Russia.
Operating principle

Technical characteristics
| Diameter |
Material |
Capacity |
Weight |
| DN, mm |
|
l/s |
gr |
50
75
110 |
polypropylene |
37 |
550 |
Documentation
Download data sheet:
HL 900N Air admittance valve
Download example of product installation:
Air admittance valve HL 900N