Why and how should you air the room?
Grease separator systems must be ventilated to prevent corrosion, odour formation and the build-up of explosive atmospheres inside the tank. To this end, ventilation pipes are installed to allow air exchange between the separator chamber and the outside environment. The cross-sectional area of the ventilation duct must be at least equal to that of the inlet pipe. The precise requirements for the ventilation of grease separators are set out in standards DIN EN 1825-1 and 1825-2, as well as DIN 1986-100.
Specifications for the supply line
The inlet pipe of a grease separator is routed over the roof as a ventilation pipe. If it does not have a separately vented connection pipe over a horizontal distance of 10 metres, it must be additionally vented over the roof as close to the separator as possible. The additional ventilation pipe may be combined with the inlet pipe.
Standard requirements for downstream lifting stations
A lifting station connected to a grease separator must be vented separately via the roof. The ventilation pipes for the lifting station and the grease separator must not be joined; a clear distance must be maintained between the vent openings of the two pipes. If lifting stations are operated independently of a grease separator, different regulatory requirements apply to the venting of the lifting station.
F = grease separator, P = sampling, RSE = backwater level
DIN EN 1825-2
If the inlet pipe upstream of the grease separator does not have a separate vented connection pipe over a length of more than 10 metres, the inlet pipe must be fitted with an additional ventilation pipe as close as possible to the grease separator.
① DIN EN 1825-2
Inlet and outlet pipes on grease separator systems must be adequately ventilated. To this end, the inlet pipe must be routed as a ventilation pipe up to and over the roof.
② DIN 1986-100
Inlet pipes and, where applicable, the grease separator must be subject to direct aeration and ventilation above the roof in accordance with DIN EN 1825-2 in conjunction with DIN 4040-100. No other ventilation systems may be connected to these ventilation pipes.
③ DIN EN 1825-1
Grease separator systems must be constructed in such a way that ventilation is possible between the inlet and outlet. The cross-sectional area of the ventilation duct must be at least equal to that of the inlet pipe.
F = Grease separator, P = sampling point, RSE = backwater level
① DIN EN 1825-2
The ventilation pipes for the supply line and, where applicable, the grease separator may be combined into a single exhaust system.
② DIN EN 1825-2
If the supply duct above the grease separator system has no separately vented connection duct for a length exceeding 10 metres, the supply duct must be fitted with an additional ventilation pipe as close as possible to the separator system.
