07MISC. METALS: FLOOD CONTROL, STORM DRAINS, STORM SEWER
LB S-139Stainless Steel Manhole GAS TRAP ASSEMBLY Fabricated from 316 stainless steel, the assembly forms a water seal in the manhole to prevent gases from escaping into the sewer lines entering the manhole. Conforms with CITY OF LOS ANGELES Standard Plan drawing S-139-2 (revised April, 2009).* Custom fabricated gas trap assemblies for modified inlet line sizes are also available.
Catalog NumberInlet Line Size
LB S-139A8"
LB S-139B10"
LB S-139C12"
LB S-139D15"
*Standard Plan S-139-2 replaces the COLA drawing S-139-1 for Trap Manholes; a copy of Standard Plan S-139-1 and steel gate photos are included in the Photos and Drawings section of this product page for reference.

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