Domestic plumbing and water service / by William White.

  • White, William
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: Domestic plumbing and water service / by William White. Source: Wellcome Collection.

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    tected against the effects of frost, and in ordinary circumstances and positions this may easily be done by casing and other means. Even a common brass French oil hand-lamp will keep out frost from a good-sized cistern, when protected from draughts of freezing air. (25) . A ball or floating valve-tap to feed the waste-preventer cistern, whether by constant or in- termittent service, will still be required. In the working of these ball-valves, however, great and manifest improvements have now been made, by a further invention which will reduce to a minimum the chances of leakage and waste. This is effected by the adoption of an entirely new principle in their construction, the very opposite to that hitherto generally used; which principle ensures its imme- diate and automatic action in closing. The only force required to open the valve is applied below, or externally to the waterway. Under high pres- sure this force is very considerable, and is met by a simple method of single or compound lever as the case may be, its action being by way of direct counterpoise to the column of water within. It is without stuffing or packing of any sort, and quite free from all liability to stiffness or sticking. [See §§ 37,38-] (26) . It is evident that in the adoption of such a ball-tap, combined with a valveless and waste-pre- venting regulator, incapable in its operation of leaking or of being left running, the most complete provision that can be devised against waste is obtained. c