--- product_id: 618789133 title: "Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank" brand: "watts" price: "AR$1298200" currency: ARS in_stock: true reviews_count: 5 url: https://www.desertcart.com.ar/products/618789133-watts-water-technologies-gidds-1030402-watts-expansion-tank store_origin: AR region: Argentina --- # 3/4-inch male connection 3.42 gal max volume Pre-pressurized steel tank Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank **Brand:** watts **Price:** AR$1298200 **Availability:** βœ… In Stock ## Summary > πŸ’§ Keep your water system calm and efficient with Watts Expansion Tank! ## Quick Answers - **What is this?** Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank by watts - **How much does it cost?** AR$1298200 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/618789133-watts-water-technologies-gidds-1030402-watts-expansion-tank) ## Best For - watts enthusiasts ## Why This Product - Trusted watts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Durable Butyl Diaphragm:** Prevents water-air contact ensuring long-lasting, maintenance-free performance - β€’ **Universal Compatibility:** Works seamlessly with gas, oil, and electric hot water heaters - β€’ **Silent Pressure Balancer:** Eliminates noisy pipe banging for a peaceful home environment - β€’ **Certified Quality Assurance:** IAPMO listed and ANSI/NSF 61 certified for potable water safety - β€’ **Easy Installation with Pro Tips:** Simple setup with reliable connectionsβ€”just add extra Teflon tape for a perfect seal ## Overview The Watts Water Technologies GIDDS-1030402 Expansion Tank features a 3.42-gallon capacity with a durable butyl diaphragm and a pre-pressurized stainless steel tank designed to absorb thermal expansion in potable water systems. Compatible with all direct-fired hot water heaters, it ensures balanced pressure and eliminates pipe noise. Certified for safety and built for longevity, this tank is a must-have upgrade for any modern home plumbing system. ## Description Series PLT Potable Water Expansion Tanks are designed to absorb the increased volume of water created by thermal expansion and to maintain balanced pressure throughout the potable water supply system. Series PLT tanks feature a pre-pressurized steel tank with an expansion membrane that prevents contact of the water with the air in the tank. This prevents loss of air to the water and ensures long and trouble-free life for the system. These tanks may be used with all types of Direct Fired Hot Water Heaters (gas, oil or electric) and hot water storage tanks. IAPMO listed and ANSI/NSF 61 certified. Maximum Pressure: 150psi (10 bar). Review: make sure you have built a sturdy base. I don't know why they can't weld ... - I wasn't sure if this would work, we've had banging pipes for a long time. Well... it absolutely eliminated ALL the banging pipes in my house. We have a front loading washing machine and for 8 years we could tell from anywhere in the house that the washing machine was running. Once I installed this expansion tank, my wife had to go back to the laundry room twice to make sure the washer was actually running. Even I couldn't believe it was working so well. So simple to install but make sure you put enough wraps of teflon tape around the joint. I only put three and had to go back and redo it with 8 to stop a minuscule drip. Also, it can be heavy when half filled with water, make sure you have built a sturdy base. I don't know why they can't weld a bracket to hang these from right on the tank?? Highly recommended if you can hear your pipes when the water is moving through the pipes. Review: A OK - I haven't installed yet, will update in future if disappointed with product. As of now, appears to be of quality construction and sound design. Received in a very timely manner. ## Features - Butyl diaphragm - 3/4-inch male connection - Pre-pressurized - Stainless steel inlet - Acceptance volume: Max 3.42 G at 150psi ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002JEQGYO | | Brand | WATTS | | Brand Name | WATTS | | Capacity | 3.42 gallons | | Color | Stainless Steel | | Colour | Stainless Steel | | Customer Reviews | 4.6 out of 5 stars 115 Reviews | | Global Trade Identification Number | 00098268095753 | | Included Components | Watts Potable Water Expansion Tank | | Is Electric | No | | Is electric | No | | Item Type Name | Expansion Tank | | Manufacturer | Wilo | | Manufacturer Part Number | 67371 | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model Number | PLT-12 | | Number of Items | 1 | | Special Features | Pre-pressurized Steel Tank with Expansion Membrane | | Special features | Pre-pressurized Steel Tank with Expansion Membrane | | UPC | 098268095753 | | Unit Count | 1 Count | ## Product Details - **Brand:** Watts - **Capacity:** 4.5 Gallons - **Color:** Gray - **Power Source:** hydraulic_powered - **Product Dimensions:** 11.1"W x 14.7"H ## Images ![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 1](https://m.media-amazon.com/images/I/51qBGIh6GsL.jpg) ![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 2](https://m.media-amazon.com/images/I/615gVvyC3nL.jpg) ![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 3](https://m.media-amazon.com/images/I/610U7Wd+HmL.jpg) ![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 4](https://m.media-amazon.com/images/I/51-tlpGtt2L.jpg) ![Watts Water Technologies GIDDS-1030402 WATTS Expansion Tank - Image 5](https://m.media-amazon.com/images/I/51EuUMbCeQL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ make sure you have built a sturdy base. I don't know why they can't weld ... *by P***S on 11 September 2015* I wasn't sure if this would work, we've had banging pipes for a long time. Well... it absolutely eliminated ALL the banging pipes in my house. We have a front loading washing machine and for 8 years we could tell from anywhere in the house that the washing machine was running. Once I installed this expansion tank, my wife had to go back to the laundry room twice to make sure the washer was actually running. Even I couldn't believe it was working so well. So simple to install but make sure you put enough wraps of teflon tape around the joint. I only put three and had to go back and redo it with 8 to stop a minuscule drip. Also, it can be heavy when half filled with water, make sure you have built a sturdy base. I don't know why they can't weld a bracket to hang these from right on the tank?? Highly recommended if you can hear your pipes when the water is moving through the pipes. ### ⭐⭐⭐⭐⭐ A OK *by D***D on 14 April 2017* I haven't installed yet, will update in future if disappointed with product. As of now, appears to be of quality construction and sound design. Received in a very timely manner. ### ⭐⭐⭐⭐⭐ Great tank *by A***E on 30 July 2026* Easy to install, works great. Removing old one requires 2 wrenches. Install requires teflon tape, pipe dope, Indoor/House water pressure gauge, small portable compressor to bring the tank up to ambient house water pressure before installation. ## Frequently Bought Together - Watts Water Technologies PLT-12 WATTS Expansion Tank, 4.5 Gallon, Gray - Taco 400-4 1/8-Inch-NPT Float Air Hy-Vent - Watts 0342691 30 PSI Pressure Relief Valve, Bronze, 3/4" 335 M2-030 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.ar/products/618789133-watts-water-technologies-gidds-1030402-watts-expansion-tank](https://www.desertcart.com.ar/products/618789133-watts-water-technologies-gidds-1030402-watts-expansion-tank) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-08-26*