What's the caliber of the valve 1/4?
1 inches is equal to 25.4mm, 1/4 how big, count it yourself.
DN6Metric corresponding tableDN3 1/8DN4 5/32DN6 1/4DN8 5/16DN10 3/8DN15 1/2''DN20 3/4''DN25 1''DN32 1-1/4''DN40 1-1/2''DN50 2''DN65 2-1/2''DN80 3''DN100 4''DN125 5DN150 6DN200 8DN250 10DN300 12DN400 16DN450 18DN500 20DN600 24
1 inches, =25.4 millimeters, 1/4 inches, =2/8 inches, =2 minutes, =DN8 (mm)3/8 inches =3 points =DN10 (mm)1/2 inches, =4/8 inches, =4 minutes, =DN15 (mm)3/4 inches, =6/8 inches, =6 minutes, =DN20 (mm)1 inches =DN25 (mm)1 1/4 inch =DN32 (mm)1 1/2 inch =DN40 (mm)2 inches =DN50 (mm)
