JPH0223075U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the drainage system of a washbasin equipped with the drainage device of the present invention, Fig. 2 is a longitudinal cross-sectional view showing the connection structure using an adapter, and Fig. 3 is a cross-section taken along the line arrow - in Fig. 2. Figures 4 and 4 are longitudinal sectional views showing the lower member of the adapter, Figures 5 and 6 are views showing other embodiments, and Figures 7 and 8 are diagrams showing a case with a double pipe structure. FIG. 1: washbasin, 1a: hot water mixing faucet, 2: electric water heater, 3: expansion tube, 4: water receiver, 5: expansion water discharge pipe, 5a: trap, 6: drain pipe, 6a: trap, 7: Adapter, 8: Upper member, 8a: Connection sleeve, 8b: Expanded water inflow tube, 8c: Cap nut, 8
d: Packing, 9: Lower member, 9a: Connection sleeve, 9b: Cap nut, 9c: Packing, 9d: Expansion water outlet, 10: Bush, 10a: Protrusion, 11
: Check valve, 11a: Valve body, 11b: Packing, 1
1c: inlet, 12: rib, 13: deodorizing ring,
14: Inner flange, A: Floor, a: Drainage main, B
: Cabinet, b: Bottom plate, b-1: Hole, C: Cover.

Claims (1)

[Scope of utility model registration request] An adapter is provided that connects the lower ends of an expanded water discharge pipe connected to the expansion pipe of an electric water heater in a state open to the atmosphere and a drain pipe of a washbasin, etc., to a main drainage pipe piped into the building, and the adapter includes: A drainage device comprising a check valve that prevents backflow to the expanded water discharge pipe, the check valve including a vertically long columnar float type valve body.