Find the lowest price for:       All ProductsCO2 Products     5.0 (1)   Add a review CO2 Brass Check Valve by German Air Pressure Systems   These are the highest quality industrial-grade Brass Check Valve from German Air Pressure Systems. They are heavy-duty enough for food-grade liquid as well. Just like you, we also thought that these were unnecessarily overkill for aquaristic purposes, but it has been proven that these are the ONLY qualified Check Valves for protecting your expensive CO2 equipment ... Have a question? Ask the Experts! Compare Prices Product Spec Member Reviews Recommend to Friends Searched CO2 Brass Check Valve by German Air Pressure Systems in 150 stores, 0 results found Image Description   Store   Price Sorry - We couldn't find any stores offering this product. Please check again. Are we missing a store? Let us know! Something wrong in this page? Let us know! Related products: More German Air Pressure Systems CO2 Products Other CO2 Products internal use: spec549