Drain Manholes Contact Us See our Resources/Brochures for Drain Manholes Drain Manholes SRP 4'DIA MANHOLE WITH WEIR-Model SRP 4'DIA OCS EXT BASE-Model SRP 4'DIA OCS WITH WEIR-Model SRP 4'DIA OUTLET CONTROL STRUCTURE Model (1) SRP 4'DIA RHODE ISLAND SUMP 4' DEEP SRP 4'DIA RHODE ISLAND SUMP SRP 5' DIA 5kPSI DRAIN MANHOLE-Model SRP 5' DIA DOGHOUSE MANHOLE SRP 5' DIA DRAIN MANHOLE EXTENDED BASE SRP 5' DIA DRAIN MANHOLE SRP 5' DIA DROP-OVER DRAIN MANHOLE SRP 5' DIA FLAT TOP DUEL 2' OPENING SRP 5' DIA GAS TRAP FOR 6 INLET SRP 5' DIA GAS TRAP for 8 INLET SRP 5' DIA GAS TRAP SRP 5' DIA NO RING FLAT TOP 2' DIA OPENING SRP 5' DIA OUTLET CONTROL STRUCTURE Model (1) SRP 5' DIA TRANSITION TO 4' DIA SRP 5' DIA WET WELL SRP 6' DIA DOGHOUSE MANHOLE SRP 6' DIA DRAIN MANHOLE SRP 6' DIA LOW-PRO DRAIN MANHOLE SRP 6' DIA 5kPSI DIVERSION MANHOLE Model (1) SRP 6' DIA 5kPSI DRAIN MANHOLE-Model SRP 6' DIA DRAIN MANHOLE 4' SUMP SRP 6' DIA DRAIN MANHOLE EXTENDED BASE SRP 6' DIA GAS TRAP FOR 8 INLET SRP 6' DIA GAS TRAP FOR 10 INLET SRP 6' DIA MAN CATCHER SRP 6' DIA TRANSITION TO 4' DIA SRP 7' DIA 5K PSI DRAIN MANHOLE -Model SRP 7' DIA DOGHOUSE MANHOLE Model (1) SRP 7' DIA DRAIN MANHOLE SRP 7' DIA TRANSITION TO 4' DIA Model (1) SRP 8' DIA 5K PSI DRAIN MANHOLE-Model SRP 8' DIA 5k PSI EXTENDED BASE MANHOLE-Model SRP 8' DIA DOGHOUSE MANHOLE SRP 8' DIA DRAIN MANHOLE SRP 8' DIA EXTENDED BASE MANHOLE SRP 8' DIA TRANSITION TO 4' DIA SRP 10' DIA DRAIN MANHOLE SRP 3' DIA DRAIN MANHOLE SRP 4' DIA FLAT TOP 2' DIA SRP 4' DIA FLAT TOP NO RING 2' DIA SRP 4' DIA X 1.5' CONE NO RING SRP 4' DIA X 2' CONE NO RING SRP 4' DIA X 2.5' CONE NO RING SRP 4' DIA X 3' CONE NO RING SRP 4'DIA 5k PSI DRAIN MANHOLE EXT BASE-Model SRP 4'DIA 5kPSI DRAIN MANHOLE HS-25 LOADING-Model SRP 4'DIA 5kPSI DRAIN MANHOLE SRP 4'DIA DOGHOUSE MANHOLE SRP 4'DIA DRAIN MANHOLE EXT BASE SRP 4'DIA DRAIN MANHOLE HS-25 LOADING-Model SRP 4'DIA DRAIN MANHOLE WITH 4' SUMP & EXT BASE-Model SRP 4'DIA DRAIN MANHOLE WITH 4' SUMP 24 ROUND SRP 4'DIA DRAIN MANHOLE WITH 4' SUMP SRP 4'DIA FLAT TOP 30 OPENING CENTERED SRP 4'DIA GAS TRAP 90 DEGREE SRP 4'DIA GAS TRAP 270 DEGREE SRP 4'DIA GAS TRAP WITH EXTENDED BASE SRP 4'DIA GAS TRAP SRP 4'DIA LEACHING DRAIN MANHOLE