--- product_id: 11011229 title: "WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402" brand: "watts" price: "āļŋ15277" currency: THB in_stock: true reviews_count: 13 category: "Watts" url: https://www.desertcart.co.th/products/11011229-watts-water-technologies-gidds-1030402-watts-potable-water-expansion-tank store_origin: TH region: Thailand --- # 4.5 Gallon Capacity 3/4-inch Stainless Steel Nipple 150 psi Max Pressure WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402 **Brand:** watts **Price:** āļŋ15277 **Availability:** ✅ In Stock ## Summary > 💧 Keep your water system flawless and pressure-perfect — because every drop counts! ## Quick Answers - **What is this?** WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402 by watts - **How much does it cost?** āļŋ15277 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/11011229-watts-water-technologies-gidds-1030402-watts-potable-water-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 - â€Ē **Built to Last:** High-quality carbon steel with epoxy finish and a resilient expansion membrane for longevity. - â€Ē **Effortless Installation:** Mounts directly to supply piping with a durable stainless steel inlet for quick setup. - â€Ē **Universal Compatibility:** Works seamlessly with gas, oil, or electric direct-fired water heaters and storage tanks. - â€Ē **Eco-Conscious Engineering:** Lead-free design prioritizes water safety and sustainability for a cleaner future. - â€Ē **Optimized Thermal Control:** Absorbs water expansion to maintain safe, balanced pressure in your system. ## Overview The Watts Potable Water Expansion Tank Model PLT-12 features a 4.5-gallon capacity and a robust 3/4-inch stainless steel nipple for easy mounting. Engineered with high-grade carbon steel and an epoxy finish, it withstands pressures up to 150 psi, ensuring reliable thermal expansion control in residential and commercial water heating systems. Certified lead-free and compatible with all direct-fired water heaters, it delivers durable, eco-friendly performance that safeguards your water supply. ## Description Product Description WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402 From the Manufacturer 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: Worked Just Fine! - OEM. Worked Just Fine! Review: Prevents pressure relief valve from firing - We got our pressure valve fixed and so had to install this to prevent the pressure relief valve from going off on the heater. This was easy to install and has clear instructions: 1: pump to the same pressure as the water pressure 2: install (no need to support it) It's pretty small so make sure to size it appropriately. We have had zero issue and everything is working just fine. ## Features - WATER EXPANSION TANK: With a generous 4.5 tank gallon volume, the Watts Potable Water Expansion Tank is designed for use in commercial and residential water heating systems to control the thermal expansion of hot water and maintain safe pressures. - VERSATILE MOUNTING: This potable water expansion tank is designed for easy installation, mounting directly to the supply piping. It features a 3/4-inch male connection and a stainless steel inlet. - DURABLE CONSTRUCTION: This tank is constructed from high-quality carbon steel with an epoxy finish, ensuring long-lasting performance. It is also equipped with a durable expansion membrane that minimizes the loss of the air charge. - COMPATIBILITY: These tanks may be used with all types of Direct Fired Hot Water Heaters (gas, oil or electric) and hot water storage tanks. Comes with a maximum pressure of 150psi (10 bar). - EVERY DROP COUNTS: Water. It's in our name and close to our hearts. Everything we design is made to keep the Earth's most precious resource safer, cleaner, and more useful for our customers. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002JEQGYO | | Brand Name | Watts | | Capacity | 4.5 Gallons | | Color | Gray | | Customer Reviews | 4.5 4.5 out of 5 stars (438) | | Global Trade Identification Number | 00098268095753 | | Included Components | Watts Potable Water Expansion Tank | | Item Dimensions W x H | 11.1"W x 14.7"H | | Item Type Name | Expansion Tank | | Manufacture Year | 2023 | | Manufacturer | Wilo | | Manufacturer Part Number | 67371 | | Material Type | Alloy Steel | | Model Number | PLT-12 | | Power Source | hydraulic_powered | | Style Name | Potable | | UPC | 098268095753 | | Unit Count | 1.0 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 Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402 - Image 1](https://m.media-amazon.com/images/I/51qBGIh6GsL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked Just Fine! *by K***T on December 20, 2025* OEM. Worked Just Fine! ### ⭐⭐⭐⭐⭐ Prevents pressure relief valve from firing *by B***D on January 1, 2024* We got our pressure valve fixed and so had to install this to prevent the pressure relief valve from going off on the heater. This was easy to install and has clear instructions: 1: pump to the same pressure as the water pressure 2: install (no need to support it) It's pretty small so make sure to size it appropriately. We have had zero issue and everything is working just fine. ### ⭐⭐⭐⭐⭐ Good quality Tank- paint and threads. *by C***G on September 14, 2020* The tank arrived on time and in good condition. Installation was easy. The tank paint and threads were all good quality. It was installed to reduce water pressure changes on my hot water tank. The pressure relief valve was periodically leaking and the expansion tank resolved the problem. ## 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? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/11011229-watts-water-technologies-gidds-1030402-watts-potable-water-expansion-tank](https://www.desertcart.co.th/products/11011229-watts-water-technologies-gidds-1030402-watts-potable-water-expansion-tank) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-26*