{"product_id":"hx120-heat-exchanger","title":"Astralpool HX 120 Heat Exchanger - Tube Bundle","description":"\u003ch3\u003eAstralpool HX 120 Heat Exchanger - Tube Bundle\u003c\/h3\u003e\u003cp\u003eAstralpool Hurlcon HX 120 heat exchanger (tube bundle) replacement for all Hurlcon and Astralpool HX 120, WX 120, and WWDG 120 series heaters. Also known as the tube bundle, or heater coils. Tubes are made of cupro-nickel. Due to inconsistent supply, these are orders as needed. Allow extra time, even for Express orders.\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003ePhysically Stocked, unlike most \"drop-shipping\" websites.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eShipped from VIC, NSW, WA, QLD\u003c\/strong\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhere replacing a heat exchanger due to a leak, we strongly recommend replacing the \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/hurlcon-astralpool-hx-70-hx-120-inlet-outlet-manifold-complete\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eManifold\u003c\/a\u003e \u0026amp; \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/hurlcon-astralpool-hx-jx-wx-heat-exchanger-adaptor-seal-kit\"\u003eSeals\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Information on Heat Exchangers for Pool \u0026amp; Spa Gas Heaters\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe CuproNickel and Copper components used in these heat exchangers have remained consistent for nearly 30 years. This is a time-tested, proven design known for its durability and thermal efficiency in pool and spa heating systems. We regularly see heaters with these heat exchangers last over 20 years when cared for.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow They Work - \u003c\/strong\u003ePool and spa gas heater heat exchangers transfer heat from the combustion chamber to the water that circulates through the unit. Materials like Copper and CuproNickel are used due to their excellent thermal conductivity, helping the system heat water quickly and efficiently.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Cause of Failure:\u003c\/strong\u003e Chemical Corrosion. The most frequent cause of failure in these heat exchangers is chemical corrosion, not mechanical or manufacturing faults.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSigns of Corrosion Damage:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTiny pinholes forming in the tubing or fittings (particularly on elbows)\u003c\/li\u003e\n\u003cli\u003eBlue or green discoloration in the water\u003c\/li\u003e\n\u003cli\u003eHigh copper levels detected in water tests\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese symptoms mean the heat exchanger has been chemically attacked.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Spa and Pool Heaters Are Especially Vulnerable\u003c\/strong\u003e\u003cbr\u003ePool and spa heaters operate under high temperature conditions, which can amplify the effects of poor water chemistry.\u003c\/p\u003e\n\u003cp\u003eSpa water, in particular, is often treated with high levels of sanitizer and kept at elevated temperatures, increasing corrosive risk.\u003c\/p\u003e\n\u003cp\u003eLow pH (acidic water) and the use of bromine tablets are especially harsh on heat exchangers.\u003c\/p\u003e\n\u003cp\u003eEven a brief imbalance in water chemistry can lead to permanent damage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePro Tips: \u003c\/strong\u003eTest and balance your pool or spa water \u003cem\u003eweekly\u003c\/em\u003e to protect your investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMaintain: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003epH between 7.2 – 7.8\u003c\/li\u003e\n\u003cli\u003eTotal alkalinity between 80 – 160 ppm\u003c\/li\u003e\n\u003cli\u003eCalcium Hardness: 150-400ppm\u003c\/li\u003e\n\u003cli\u003eAvoid use of Bromine tablets if possible\u003c\/li\u003e\n\u003cli\u003eNever use Chlorine tablets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty: \u003c\/strong\u003eThese heat exchangers include a 1-year limited warranty. However, damage caused by chemical corrosion is not covered under warranty, as it is a result of water chemistry mismanagement rather than a product defect. \u003cbr\u003e\u003cstrong\u003eOther:\u003c\/strong\u003e Special-order item.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLearn More: \u003c\/strong\u003e\u003cbr\u003eFor detailed guidance on identifying and preventing chemical corrosion, click: \u003ca href=\"https:\/\/heaterandspaparts.com.au\/pages\/corrosive-water-damage\" rel=\"noopener\" target=\"_blank\"\u003eCorrosive Water Damage\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWeight When New: \u003c\/strong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003e4.5-4.6kg - \u003c\/span\u003eIf heat exchanger weighs less than the above, the copper has been eroded away. If it weighs more, it may be full of calcium.\u003cem\u003e\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eManufacturer Catalogues, Diagrams \u0026amp; Part Numbers\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNeed exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: \u003ca href=\"https:\/\/hasp.com.au\/pages\/Astralpool_Catalogue_2026\"\u003eAstralpool Catalogue 2026\u003c\/a\u003e | \u003ca href=\"https:\/\/hasp.com.au\/pages\/Zodiac_Catalogue_2026\"\u003eZodiac Catalogue 2026\u003c\/a\u003e \u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eInteractive Parts Diagrams\u003c\/h3\u003e\n\u003c!-- hasp-parts-diagrams --\u003e\n\u003cp style=\"font-size: 16px;\"\u003eFind this part on our interactive heater parts diagrams — each one opens the full exploded view and parts list:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"font-size: 16px;\"\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/pages\/astralpool-hurlcon-hx-120-gas-heater-spare-parts-diagram-list\" style=\"color: #009bdb; font-weight: 600;\"\u003eAstralpool \/ Hurlcon HX 120 Gas Heater — Diagram \u0026amp; Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astralpool","offers":[{"title":"Default Title","offer_id":17313386309,"sku":"HSP420","price":1010.0,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/astralpool-hx-120-heat-exchanger-tube-bundle-gas-heater-parts-454.webp?v=1779178326","url":"https:\/\/heaterandspaparts.com.au\/en-nz\/products\/hx120-heat-exchanger","provider":"Heater and Spa Parts","version":"1.0","type":"link"}