Pressure (mH₂O)	UC and UD	Spacing between sprinklers (m)
Pressure (mH₂O)	UC and UD	6 × 6	6 × 9	8 × 8	6 × 12	9 × 9	9 × 10	10 × 10	9 × 12	10 × 12	12 × 12
25	UC	90.6	90.0	90.2	89.9	88.1	88.4	88.1	88.2	88.5	85.8
25	UD	90.1	85.5	84.0	85.5	84.3	83.7	82.9	80.3	79.9	81.2
30	UC	91.1	91.3	91.8	90.4	89.3	89.2	89.0	89.8	90.0	87.7
30	UD	90.9	87.6	87.1	86.3	86.2	84.6	83.8	82.0	82.5	83.7
35	UC	92.3	93.7	93.9	91.4	91.5	91.4	91.7	92.3	92.2	89.6
35	UD	92.2	90.6	91.7	87.3	88.2	86.6	86.7	85.4	86.1	85.3
40	UC	92.9	94.0	94.9	92.5	92.3	91.9	91.5	92.5	92.6	91.6
40	UD	92.7	91.2	93.0	88.8	89.6	87.8	87.2	86.5	86.3	86.8