What inlet and pressure ratings do yard hydrants share?

The example bury depth is not a site recommendation

All examples here are 2 ft bury-depth variants from Merrill or Simmons. That shared depth makes the model comparison easier, but it does not choose a safe burial depth for your site. Settle frost depth, drainage and backflow arrangements with the installation guidance before ordering a variant. Merrill includes nominal 3/4 in and 1 in inlet choices; the Simmons examples have 3/4 in inlets. Check the thread and connection details as well as nominal size. Select the exact part on model-family pages; stock availability is unconfirmed, and the maker specifications have not been supplemented by assessment of an installed hydrant.

Pressure limits and valve material separate similar hydrants

Known maximum-pressure ratings range from 70 to 120 psi. Merrill's Celcon-body option has a Celcon valve body and a 100 psi maximum, while the Simmons bronze-body option has a 120 psi maximum. Choose a supported pressure limit for your installation before comparing body materials.

A maximum working-pressure figure is not the pressure used for a flow measurement. Merrill's larger-inlet brass-body option without a pressure figure has no supported maximum-pressure value here, so inlet size cannot fill that gap. Likewise, an unknown valve-body material remains unknown rather than becoming brass by assumption.