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Civacon (Knappco) · Fuel System
LM1161
In stock · ships from Knoxville
This is a 20-inch aluminum manhole assembly designed for cargo tanks, dry bulk trailers, crude oil trailers, and similar industrial containers.
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Designed for tanks with a working pressure ≤ 30 PSI. Fits a 20-inch opening and requires welding of the 6-inch aluminum collar.
Part data verified against 5 catalog sources
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It provides a full-opening access port on top of the tank, rated for working pressures up to 25–30 PSI. The assembly includes a 6-inch-tall aluminum weld collar and a lid secured by six adjustable cam levers with nylon wear plates and a Buna‑N gasket to create a reliable seal. You would replace this when the lid or collar becomes damaged, corroded, the gasket fails, or the cams no longer hold pressure securely.
Part Number: LM1161
MANHOLE ASSY W/COLLAR 20
Unit: ea
Vendor: Knappco Corp.
Dealer: Post Onsite
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