THIS VERSION OF THE
ENVIROSAFE CATCH BASIN, THE HEAVY DUTY SURFACE DRAIN CATCH BASIN, IS USED IN NEW
CONSTRUCTION INSTEAD OF A CONCRETE CATCH BASIN. THE SURFACE DRAIN CATCH BASIN'S
DESIGN IS BASED ON THE LINE SIZE TO GIVE FULL FLOW. THE SURFACE DRAIN CATCH BASIN
PROVIDES CONTINUOUS FLOW WHILE MAINTAINING A WATER SEAL THAT PREVENTS HYDROCARBONS FROM
ESCAPING TO THE ATMOSPHERE, THEREBY COMPLYING WITH EPA AIR QUALITY REGULATIONS RESTRICTING
EMISSIONS OF VOC'S SUCH AS BENZENE. THE SURFACE DRAIN CATCH BASIN CAP CAN BE REMOVED
TO FLUSH ANY HYDROCARBONS THAT MIGHT COLLECT ON THE WATER SEAL. A MINIMUM WATER SEAL
DEPTH OF 6" IS RECOMMENDED TO PREVENT BACK PRESSURE FROM FORCING ANY HYDROCARBON
VAPORS THROUGH THE WATER SEAL ONCE THE SEWER SYSTEM HAS BEEN SEALED. THE SURFACE
DRAIN CATCH BASIN CAN PREVENT SEWER EXPLOSIONS BY ELIMINATING CONTACT OF SEWER GASES WITH
AN IGNITION SOURCE. THE GRATING AREA IS DESIGNED FOR HEAVY DUTY H-20 LOADING. |
| COVERED BY U.S. PATENT NO.'S 4,682,907; 4,776,722; 5,028,320; 5,062,735 |