Cash Acme 23156-0045 - 1" EB45 Double Union Threaded Pressure Regulating Valve1" EB45 DU Double Union Threaded The EB45 Pressure Regulator features a half cartridge design that offers the performance of a high end, cartridge based valve and the price of a traditional regulator. The valve construction is similar to a traditional regulator in that it retains a separate spring chamber and adjusting screw, but offers the simplicity and maintenance benefits of a cartridge based valve. The EB45 comes factory set at 45 psi but may be