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pH Probe Fitting: 1/2" male pipe thread by 1/2" probe compression fitting. $4.00
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Check Valve: Replacemenet check valve for GEO reactors, suitable for liquid or gas. $2.00
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Micro Ball Valve: Replacement effluent line controll valve for GEO reactors $2.00
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Thnumb Screw: Replacement 1/4-20 thumbscrews for GEO reactors. Sold per each. $0.25
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