07 Misc. Metals-Flood Control, Storm Drains, Storm Sewer

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CITY OF LOS ANGELES S-139-2 GAS TRAP MAINTENANCE HOLE

LB S-139-2 Stainless Steel Maintenance Hole GAS TRAP ASSEMBLY

Fabricated from 316 stainless steel the assembly forms a water seal in the manhole structure 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 Number Inlet Line Size
LB S-139A 8""
LB S-139B 10""
LB S-139C 12""
LB S-139D 15""

*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.