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6.3.2 Layout of the intake line
Only an internally reinforced flexible (vacuum resistant) hose can be used for the intake line. This allows
for the use of a floating intake in the tank. The internal diameter of the intake line must be at least Ø 26
mm. The INTEWA intake hose (SDS 1“, Art.-Nr. 61 00 25) is designed for this requirement.
In order to avoid potential leaks at connection points, it is strongly recommended that the intake hose
(from the intake filter in the tank all the way to the RM Favorit unit) should be one piece – containing no
joins.
Warning instructions:
The internal diameter of the intake hose must be at least D=26 mm
in order to obtain full volume flow.
No water filter may be used in the intake line, since the gaskets are
not designed for underpressure. In result air could enters the intake
line.
PVC corrugated hoses are not suitable as rainwater suction lines.
Experience has shown that after some time these become brittle
and permeable to gas/air. The underpressure for intakes cannot be
built up later and the air enters the intake line.
No flexible hoses can be used in the intake region since these soft,
internal rubber coated hoses are constricted with underpressure.
The intake hose line must never bend, kink or be constricted in any
way.
