Check the listing for details. Sulfur Stop System - For Rotten Egg Odor And Iron Removal From Well Water. Condition: New. Listed at 225.00 USD. There’s no venturi or expensive filter needed for this system to remove the unwanted odor from your well. Installation is straightforward, just connect the female garden hose fitting on the Sulfur Diffuser System to the male spigot at the well, remove the existing 1/2in npt plug/vent on the top of the well seal, then place the misting nozzle down the hole and turn the spigot faucet on.There’s no venturi or expensive filter needed for this system to remove the unwanted odor from your well. Installation is straightforward, just connect the female garden hose fitting on the Sulfur Diffuser System to the male spigot at the well, remove the existing 1/2in npt plug/vent on the top of the well seal, then place the misting nozzle down the hole and turn the spigot faucet on.