§ 429.51. Commercial pre-rinse spray valves.

238 words·~1 min read·/us/cfr/t10/s§ 429.51·

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(a)Sampling plan for selection of units for testing.

(1)The requirements of § 429.11 apply to commercial prerinse spray valves; and

(2)For each basic model of commercial prerinse spray valve, a sample of sufficient size must be randomly selected and tested to ensure that any represented value of flow rate must be greater than or equal to the higher of:

(i)The mean of the sample, where: and, x is the sample mean; n is the number of samples; and xi is the i th sample; Or,

(ii)The upper 95-percent confidence limit

(UCL)of the true mean divided by 1.10, where: and, x is the sample mean; s is the sample standard deviation; n is the number of samples; and t0.95 is the t statistic for a 95-percent two-tailed confidence interval with n-1 degrees of freedom (from Appendix A of this subpart).

(b)Certification reports.

(1)The requirements of § 429.12 are applicable to commercial prerinse spray valves; and

(2)Pursuant to § 429.12(b)(13), a certification report must include the following public product-specific information: The flow rate, in gallons per minute (gpm), rounded to the nearest 0.01 gpm, and the corresponding spray force, in ounce-force (ozf), rounded to the nearest 0.1 ozf. [76 FR 12451, Mar. 7, 2011; 76 FR 24779, May 2, 2011, as amended at 78 FR 62986, Oct. 23, 2013; 80 FR 81453, Dec. 30, 2015; 81 FR 4801, Jan. 27, 2016]

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§ 429.51

Commercial pre-rinse spray valves.

Fed. Reg.×19

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