DE29507701U1 - Overflow-protected free outlet for drinking water replenishment - Google Patents

Description

- 1 applicant

Reinhold Holstein
Ernst-Degeler-Str. 23
89518 Heidenheim

Overflow-protected free outlet for drinking water refills

The invention describes a device for refilling drinking water in rainwater cisterns based on the relevant DIN standards, i.e. free outlet above the backflow level.

The free outlet means that a distance of at least 2 cm must be ensured between the mouth of the public network and the maximum water level.

In order to achieve a free outlet above the backflow level, it must generally be installed in the basement or above (i.e. above ground level).

State of the art

1. "Funnel principle": When feeding drinking water from the public network into rainwater collection tanks, it is only permitted to do so via a so-called free outlet. This free outlet is achieved by feeding the water from the public network into a funnel at a defined distance above it. The water collected by the funnel then flows into the collection tank without pressure.

Drinking water feed systems based purely on the "funnel principle" are at risk of backflow (the pipe connected to the funnel can freeze; backflow can also occur if the pipe is too long and has a small cross-section).

2. "Funnel with overflow, also known as so-called refill boxes: In this variant, the water is fed into a container with an overflow connection to the sewer (in the basement); funnels with overflow nozzles are equivalent.

These variants require more installation work due to the additional overflow pipe. When installing in oil-fired boiler rooms, for example, a sewer connection is generally not possible.

The invention describes an overflow-proof free outlet, which is characterized by the following properties:

• Safe against overflow

• no additional sewer connection is required in the house

• easy installation due to extensive pre-assembly

-2-

Structure OBiId 1):

The collecting funnel (3) is located inside pipe (1), which is compatible with the usual pipe diameters in the wastewater sector. Above this, the inlet pipe (2) opens, from which drinking water flows from the public network into the funnel. The funnel (3) can be connected to a pipe system (pipe or hose) via nozzle (4). The overflow-protected free outlet is installed in such a way that the pipe system connected to the nozzle (4) and carrying pressureless drinking water runs inside the extension of pipe (1). The extended pipe (1) opens into the sewer, the pipe system connected to the funnel (3) opens directly or indirectly into the rainwater collection tank.

Function:

The funnel (3) is supplied with drinking water via the free outlet (2). The pipe system connected to the nozzle (4) leads this water to the collecting tank. The funnel (3) itself is protected against overflow by extending the pipe (1) surrounding it so that it is connected to the sewage network outside the cellar; the pipe system connected to the nozzle (4) is therefore surrounded by this pipe. The pipe system connected to the nozzle (4) is led out of the surrounding pipe depending on the filter or collection systems connected.

Claims (2)

- 1 applicant Reinhold Holstein Ernst-Degeler-Str. 23 89518 Heidenheim Claims 1. Overflow-protected free outlet
characterized in that the free outlet, consisting of a collecting container (3) and an inlet (2), is fixed within a surrounding casing (1) that is open at least in the direction of the nozzle (4) in such a way that the space above the collecting container (3) is connected to the space below the collecting container (3) within the casing (1), and that the casing (1) can be connected to a pipe by plugging them together at least on the side facing the nozzle (4) in such a way that a hose/pipe connected to the nozzle (4) lies inside the pipe connected to the casing (1). 2. Overflow-protected free outlet according to claim 1, characterized in that the casing (1) can be designed as complex as desired and can, for example, also integrate an odor trap.