Invention Grant
US09435435B2 Universal secondary safety system including a riser and screen 有权
通用二级安全系统,包括立管和屏幕

Universal secondary safety system including a riser and screen
Abstract:
Systems for providing universally installable secondary safety systems for use, in one embodiment, with a riser for a septic tank are disclosed. In some embodiments, the system includes the following: a riser extending from a system of interest located underground, a retainer ring installed within said riser, and a safety screen to prevent access to the underground system and lower portions of the riser from above.
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