Irritrol's 102P1 1" Valve with Anti-Contam comes from the 100 Series. It has a 1" NPT thread. The 102P1has a flow rate of 5 - 300 GPM. It has a pressure rating of 10 - 110 PSI. This valve features an anti-contamination filter valve. Irritrol has made their name as a brand by selling and marketing exclusively to the professional installer, as a result their products are geared to be dependable and durable. Irrirtrol is now making their products available to you through our website. If you are looking for a product line that will last year in and year out, Irritrol is the brand for you.