--- product_id: 321342975 title: "PH5 FLEX2PRO Thermal Expansion Tank - 2.1 Gallon" brand: "flexcon industries" price: "$221.07" currency: USD in_stock: true category: "Flexcon Industries" url: https://www.desertcart.us/products/321342975-ph5-flex2pro-thermal-expansion-tank-2-1-gallon store_origin: US region: United States of America --- # 2.1 Gallon capacity Stainless steel corrosion-resistant sleeve 100% butyl diaphragm for water-air separation PH5 FLEX2PRO Thermal Expansion Tank - 2.1 Gallon **Brand:** flexcon industries **Price:** $221.07 **Availability:** ✅ In Stock ## Summary > 💧 Stay ahead of pressure spikes with Flexcon’s pro-grade expansion tank! ## Quick Answers - **What is this?** PH5 FLEX2PRO Thermal Expansion Tank - 2.1 Gallon by flexcon industries - **How much does it cost?** $221.07 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/321342975-ph5-flex2pro-thermal-expansion-tank-2-1-gallon) ## Best For - flexcon industries enthusiasts ## Why This Product - Trusted flexcon industries brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Reliability:** Backed by Flexcon’s 1-year limited warranty for peace of mind and professional-grade performance. - • **Compact Yet Powerful:** 2.1-gallon capacity fits seamlessly into your system while handling thermal expansion efficiently. - • **Effortless Integration:** Standard dimensions and premium build quality make installation smooth and maintenance minimal. - • **Corrosion-Resistant Durability:** Stainless steel sleeve and appliance-quality paint keep your system pristine and long-lasting. - • **Optimized Water-Air Separation:** 100% butyl diaphragm and plastic liner ensure flawless pressure management without contamination. ## Overview The Flexcon PH5 FLEX2PRO is a 2.1-gallon thermal expansion tank designed for potable water systems, featuring a 100% butyl diaphragm and plastic liner to separate water from air precharge. Its stainless steel sleeve prevents corrosion, a unique advantage over competitors, while appliance-quality paint protects against external wear. Compact and reliable, it’s backed by a 1-year limited warranty, making it a smart, durable choice for managing thermal expansion in home water heaters. ## Description These potable water expansion tanks feature a 100% butyl diaphragm and plastic liner to separate the system water from the tanks air precharge. The system has a stainless steel sleeve to prevent corrosion, something no other manufacturer offers. And, the tanks are finished with appliance-quality paint to help prevent external corrosion. On top of all of this, every PH tank is comprehensively d and backed by Flexcon's one-year limited warranty. ## Features - PH tanks feature a 100% butyl diaphragm and plastic liner to separate the system water from the tank’s air precharge - The system connection has a stainless steel to prevent corrosion, something so other manufacturer offers - Tanks are finished with appliance quality paint which helps prevent external corrosion - PH tanks are comprehensively d and backed by Flexcon’s 1 year limited warranty - Volume: 2.1 Gallons ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005EEZEH6 | | ASIN | B005EEZEH6 | | Best Sellers Rank | #217,097 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #297 in Water Pump Accessories | | Brand Name | Flexcon Industries | | Capacity | 2.1 Gallons | | Compatible with Vehicle Type | Universal | | Date First Available | 17 September 2012 | | Exterior Finish | Painted White | | Fit Type | Universal | | Global Trade Identification Number | 00795033090813 | | Is Discontinued By Manufacturer | No | | Item Dimensions | 21.6 x 21.3 x 34.3 centimeters | | Item model number | PH5 | | Manufacturer | Flexcon Industries | | Manufacturer | Flexcon Industries | | Manufacturer Part Number | PH5 | | Material Type | Plastic | | Model Number | PH5 | | OEM Equivalent Part Number | PH5 | | Product Dimensions | 21.59 x 21.34 x 34.29 cm; 2.3 kg | | Product Grade | 10 (new/unused) | | UPC | 795033090813 | | Unit Count | 1 Count | ## Product Details - **Brand:** Flexcon Industries - **Exterior finish:** Painted White - **Item dimensions L x W x H:** 21.6 x 21.3 x 34.3 centimeters - **Material:** Plastic - **Vehicle service type:** Universal ## Images ![PH5 FLEX2PRO Thermal Expansion Tank - 2.1 Gallon - Image 1](https://m.media-amazon.com/images/I/612YDMkNAVL.jpg) ## Available Options This product comes in different **Size** options. ## Frequently Bought Together - Flexcon Industries PH5 FLEX2PRO Thermal Expansion Tank - 2.1 Gallon - HoldRite QuickStrap Universal Expansion Tank Water Heater Wall Mounting Bracket, Stainless Steel, QS-U - MEASUREMAN 0-200 PSI Water Pressure Gauge, 2-1/2'' Dial, Hose bib Pressure Gauge, Home Water Pressure Tester, Durable 3/4” Hose Thread, Water Pressure Gauge for Home --- ## 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.us/products/321342975-ph5-flex2pro-thermal-expansion-tank-2-1-gallon](https://www.desertcart.us/products/321342975-ph5-flex2pro-thermal-expansion-tank-2-1-gallon) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-26*