1. Product unit: made of by polymer composites and glass fiber,aging-resisting,acid -resisting and alkali-resisting , non-corrosion,non-degradable in one hundred years.

2. easy installation__Modular components permit easy assembly into existing manholes.no operation,contaminated air passes through the unit where the objectionable chemicals are trapped and stored in the arbon ,allowing a purified air stream to vent through the top of the canister into the atmosphere.

3. easy to replace carbon:When odor breakthrough is detected ,only the carbon needs to be replaced.Twenty-kg refill bags in it.Standard canisters, will fit round manholes in diameter size of 65cm .

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The whole set picture:

The molds for the set:

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