GESTRA MK 35/31 Instructions De Montage page 9

Danger
The trap is under pressure during operation. When disassembling or
opening the trap, or loosening sealing plugs, hot water and steam may
escape. This presents the danger of severe burns to the whole body.
Installation and maintenance work should only be carried out when the
system is depressurized.
The trap is hot during operation. This presents the danger of severe
burns to hands and arms. Installation and maintenance work should only
be carried out when the system is cold.
Sharp edges on internal parts present a danger of cuts to hands. Always
wear industrial gloves for installation and maintenance work.