The model No. 22359-0045 and 22358-0045 has a cartridge design. Pressure can be adjusted from 20 psi to 75 psi with a simple twist of the cap and are easy-to-repair, with replacement cartridges available. No. 22999-0045: Size: 1/2″, Material: Iron, Pressure Rating: 20 -75 psi No. 23000-0045: Size: 3/4″, Material: Iron, Pressure Rating: 20 -75 psi
