Irritrol's OMR-100 Modular Regulator comes from the Omnireg Series. The OMR-100has a flow rate of 1 - 300 GPM. It has a pressure rating of 5 - 100 PSI. This regulator can be used when setting a specific downstream pressure in your system. 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.