ECT Mfg stocks the most complete selection of environmental well protection in the world. Flush-mount monitoring manholes and vaults are in stock from 2" up to 24" diameter. Above-ground well protectors (monuments) are available in round and square in steel and aluminum construction. Well protectors (stick-ups) and bollards (bumper posts) are sand blasted and finished with a high visibility UV protectant outdoor powder coat. Our vaults and flush-mounts are H-20 highway traffic rated at minimum. HS-20, M-306 and aircraft rated manholes are in stock. Save money by purchasing directly from the manufacturer. Now stocking Alucast World Aluminum Well Protectors and Manholes.