ASME A112.19.10:2003 pdf free download

ASME A112-19-10:2003 pdf free download
ASME A112-19-10:2003 pdf free download.DUAL FLUSH DEVICES FOR WATER CLOSETS
3.3.4.2 Trap Seal Restoration
(a) Test Method. Test method follows ASME A112.19.6, paras. 7.1.6.2 and 7.1.6.3, with the following changed action: set the dual flush mechanism for a minimum 30% savings ofwater closetrated consumption, in accor- dance withthe manufacturer’sinstructions forachieving satisfactory performance. Tests shall be repeated three successive times only with the reduced volume flushes, without added refill of the bowl. The trap seal refill shall be for full reseal to within 1 ⁄ 2 in. (13 mm) for each repeated test; if trap seal depth failure with the three consecutive reduced flushes occurs, perform seven additional tests and rec- ord data. The trap seal depth shall not be less than 1 ⁄ 2 in. (13 mm) of full trap seal in six out of the total of ten tests.
For water closets that normally have 2 1 ⁄ 2 in. (64 mm) seal, full reseal shall be realized in the first three tests and, if not demonstrated, then seven additional reduced flushes shall be repeated, after the initial three, and a total of six low successive flushes with full refill shall be demonstrated. The trap seal depth shall notfall below 2 1 ⁄ 2 in. (64 mm), to within 1 ⁄ 4 in. (6 mm), in any one of the tests. Without additional bowl refill, flush one conventional long duration full discharge and observe the siphonic action and measure trap seal. Record the results of each test separately.
(b) Performance Requirements. For each set of tests, at each of the pressures, the data for the average trap seal depth in the bowl for acceptable performance shall not be reduced by
(1) more than a total of 1 ⁄ 2 in. (13 mm), based on the sequence of three successive reduced flush opera- tions; or from the additional seven tests, for a total of ten tests, more than an average from six tests of 1 ⁄ 4 in. (6 mm) below the required trap seal
(2) more than a total of 1 ⁄ 4 in. (6 mm) below the required trap seal with the long conventional flush and with preservation of siphonic action.