Standard single strainers.No tie rods or leaks under pressure or vacuum.Quick and easy mounting system allowing removal of strainer without tools.304 Stainless steel filter basket.O-ring seals at strainer cap and between strainer head and sight glass.See-thru screw-on strainer cap allows easy no-tools maintenance.Spanner wrench holes in cover allow the use of SW-2531 wrench.Install with pipe or hose.Do not use chemical or abrasive cleaners on sight glass.NOT TO BE USED IN POTABLE WATER SYSTEMS.