4-amino-5-hydroxymethyl-2-methylpyrimidine diphosphatase activity
4-amino-5-hydroxymethyl-2-methylpyrimidine diphosphatase activity
Catalysis of the reaction: 4-amino-5-hydroxymethyl-2-methylpyrimidine pyrophosphate + H2O = hydroxymethylpyrimidine phosphate + phosphate + H+.