ASME A112.19.7:2020 pdf free download – Hydromassage bathtub systems
5.2.3 Performance
Hydromassage bathtubs shall not allow retention of water in excess of 44 mL (1.5 fl oz) for each jet andsuction fitting.The water retention for air-jetted hydromassage bathtubs shall not exceed 400 mL
(13.5 fl oz), regardless of the number of air jets. Sampling shall be performed in accordance withAnnex B.
For combination whirlpool and air-jetted bathtubs, the water volumes shall be cumulative.A whirlpool bathtub with four jets and one suction fitting shall be considered to satisfy therequirements of this Clause if the residual water does not exceed 220 mL(7.5 fl oz).
The maximum residual water in combination four jet, one suction fitting whirlpool and air-jettedbathtubs shall be 620 mL (21 fl oz).
5.2.4 Chlorine test
5.2.4.1
The following requirements shall apply:
a) The procedure shall be conducted within a 1 h time interval.
b) The quality of the water used in the chlorine method shall have a total organic content no greater than 5 mg/L and a pH between 6 and 8, with the pH variation during the test no greater than t0.1.c)The original chlorine level shall be accurately measured to within ±0.05 mg/L, recorded, and
factored out of the test reading.
5.2.4.2
To prepare the chlorine solution, approximately 2% of the water in the hydromassage system shall beremoved, and the chlorine compound shall be dissolved into the water removed.The quantity ofchlorine compound shall be as specified in Table 1, with the concentration of the chlorine compoundaccurate within ±0.5%.Measurement of the chlorine compound shall be within t0.1 g.The tester shallensure that the compound is completely dissolved and shall carefully add the prepared solution to thehydromassage system, avoiding spillage.
5.2.4.3 A cover shall be placed over the hydromassage system to prevent loss of water due to turbulence orsplashing.The hydromassage system shall be run for a period of 2 min as follows:
a)For a whirlpool system, the system shall be run for 2 min continuously.
b)For an air bath system, the system shall be run for 30 s and allowed to settle for 30 s. This cycle
shall be repeated a total of two times.
5.2.4.4 At the completion of the 2 min, the hydromassage system shall be shut off, and the water within thesystem shall be allowed to drain completely for an additional 2 min.Then, with a non-porous rubbersqueegee, all the remaining water in the basin shall be scraped into the drain.
5.2.4.5 The hydromassage system shall be refilled with the same total volume of fresh water to the nearest±10 mL (0.338 oz) as determined in Clause 5.2.4.7.The procedure outlined in Clause 5.2.4.3 shall berepeated.
5.2.4.6 A sample of the water in the hydromassage system shall be tested for free chlorine using a suitablechlorine colorimeter.The chlorine colorimeter shall be accurate to within ±5%, using the DPD
(N,N-diethy-p-phenylenediamine) indicator method.A period of more than 1 min shall not be allowedto elapse before taking the free chlorine reading.The original chlorine reading of the tap water shall besubtracted from the chlorine reading to obtain the final free chlorine concentration. The volume ofwater retained in the hydromassage system shall be determined by using Table 2.
5.2.4.7 With the drain closed, the hydromassage system shall be filled with water at 24 ±3EC (75±5EF) to alevel at least 6 cm (2.4 in) above the highest jet. The quantity of water shall be measured to the nearest10 mL(0.338 oz).