Check the listing for details. (1)-2 Gallon Hot Water Heat Heater Boiler System Pressure Thermal Expansion Tank. Color: Multicolor, Condition: New. Listed at 96.99 USD. Water Worker Water Heater Expansion TankDiaphragm-type pre-pressurized expansion tank specifically designed for potable hot water systems. These tanks control water pressure build-up and eliminate relief valve spillage caused by thermal expansion when water is heated. 3/4" Male pipe thread connection. Requires no maintenance. Required by code in many counties and states. Use model No. 993-024 for self-piercing valve. Specifications: Models G5, G5L, G12, G12L; Maximum allowable working temperature: 200 deg. F.; Standard factory precharge: 40PSIG (Relief valve must be set at 150PSIG). Maximum pressure maintained at least 10% below relief valve setting (150PSIG); Models are listed with IAPMO (International Association of Plumbing and Mechanical Officials) and SBCCI (Southern Building Code Congress International); Models are NSF (National Sanitation Foundation) Listed for liner only. SpecificationDescriptionCapacity2 Gal.Pressure Rating150 psiDimensions15 In. H x 8-1/2 In. Dia.Connection Size3/4 In. MIPMaterialSteelAll items listed have shipping for the Continental United States. For AK, HI, PR, APO/AFO and other Countries please check with us about the cost of shipping before ordering. We do our best to ensure the accuracy of every listing. Unfortunately, due to our high volume, mistakes sometimes occur. If you receive an item that is not as described in our listing, please contact us directly via phone or email within three (3) days of receiving the item and we will work to correct the issue.