Miele G 4970 SCVi Product Manual - Page 69
Drainage, Venting the drain, The drain hose must not be short‐
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Water connection Drainage - The machine comes equipped with a built-in non-return valve on the dis‐ charge side to prevent waste water from flowing back into the dishwash‐ er. - Take the drain line of the dishwasher and attach the drain line as high as possible under the counter rim of the kitchen sink before connecting the end to the drain. The loop will serve to prevent a backed up drain or large volume of water in the sink from si‐ phoning back into the dishwasher. - The dishwasher is supplied with ap‐ prox. 5' 11" (1.5 m) of flexible drain hose with an internal diameter of 7/8" (22 mm). - The drain hose can be extended us‐ ing extensions and adapters. The drainage length must not be longer than 13' 1 1/2" (4 m) and the delivery head must not exceed 3' 3 3/8" (1 m). - If the hose is to be directly fitted to the drainage outlet on site, use the hose clip supplied (see installation di‐ agram). - The hose can be directed to the left or the right of the appliance. - The on-site connector for the drain hose can be adapted to different widths of hose. If the connector pro‐ trudes too far into the drain hose, it will need to be shortened. Otherwise the drain hose may become blocked. - The drain hose must not be short‐ ened. Make sure that there are no kinks in the hose, and that it is not squashed or stretched. After servicing the appliance, ensure that the drain does not leak. Venting the drain If the on-site drain connection is situat‐ ed lower than the guide path for the bottom basket rollers in the open door, the drain must be vented. Otherwise a siphoning effect during a program can cause the appliance to empty itself of water. To vent: open the dishwasher door fully. Pull the lower spray arm firmly up‐ wards to remove it. Cut off the top of the vent valve in the wash cabinet. 69