Metering pumps provide the easiest and most accurate method of transferring exact amounts of liquids into a zero head space extractor. Environmental Express offers a variety of pumps and appropriate Teflon fittings suitable for numerous applications. Fittings for individual needs are readily available on a special order basis. All pumps listed use 115VAC. Adaptor Kits for Pumps These preassembled adaptor kits provide the correct tubing and fittings to connect the above metering pumps to a zero head space extractor and an extraction fluid reservoir. The kit consists of two 24" sections of PTFE tubing and fittings manufactured from Teflon and/ or 316 stainless steel.