declension angle 170 g is substantially equal to the third declension angle 170 c the eighth declension angle 170 h is substantially equal to the fourth declension angle 170 d with the channel angle 131 a 131 h for each channel 130 a 130 h being equal water impinging on the water impingement pedestal 120 and flowing to the channels 130 a 130 h should be substantially equal within each channel 130 a 130 h therefore a substantially equal volume of water is being distributed to each channel 130 a 130 h because the first and fifth discharge apertures 140 a 140 e are closest to the water impingement pedestal 120 the first and fifth channels 130 a 130 e have the largest declension angles 170 a 170 e because the second and sixth discharge apertures 140 b 140 f are closer to the water impingement pedestal 120 than the third and seventh discharge apertures 140 c 140 g declension angles 170 b 170 f for channels 130 b 130 f are less than declension angles 170 a 170 e but greater than declension angles 170 c 170 g in a like manner declension angles 170 c 170 g for channels 130 c 130 g are less than declension angles 170 b 170 f but greater than declension angles 170 d.