| 摘要 |
The apparatus for constantly maintaining the water pressure supplied from the water tank to the house regardless of the storeys, compries a water tank main body (10) mounted on the roof-top; an opening (11) formed at the periphery (10) of the tank; a cap (14) a attached detachably over the opening; a water supply tube (15) having an end section (15') passing through the periphery (10') over the upper space (16); a water discharge tube (17) connected with the periphery (10') of the lower water supply tube (15); an automatic air valve (18) for discharging air of the main body (10), mounted on upper periphery (10') which is positioned at the two third of the height.
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