{"product_id":"body-only-zx-310-filter","title":"Astralpool \/ Zodiac Body Only ZX 310 Filter 7821702","description":"\u003c!-- HASP-FLP-1.0 | SKU 7821702 | product ZX310 tank body | rule ZXB-1.0 | canary: zx-body-x310-echo-7821702 --\u003e\u003ch3\u003eAstralpool ZX 310 Cartridge Filter Tank Body — 7821702 (also Zodiac ZXC 310, Filtrite CF, Aquatight)\u003c\/h3\u003e\u003cp\u003eThis is the genuine Astralpool \u003cstrong\u003etank body\u003c\/strong\u003e for the twin-element \u003cstrong\u003eZX 310\u003c\/strong\u003e cartridge filter, part number \u003cstrong\u003e7821702\u003c\/strong\u003e. It is the lower pressure vessel that holds the cartridge elements — supplied on its own, to replace a tank that has cracked, split, crazed or is leaking below the lid. The ZX 310 is the tallest filter in the range: it runs \u003cstrong\u003etwo\u003c\/strong\u003e elements joined end-to-end by a coupler.\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\u003cp\u003eThis is the same filter sold under several brands — Astralpool ZX, Hurlcon ZX, \u003cstrong\u003eZodiac ZXC\u003c\/strong\u003e, Filtrite CF and Aquatight. The Zodiac ZXC is simply the Zodiac-badged Astralpool ZX. Tank colour and part number have both changed across production runs, so confirm the model before ordering.\u003c\/p\u003e\u003ch3\u003eThe ZX Body Match Rule (rev. ZXB-1.0)\u003c\/h3\u003e\u003cp\u003eA tank body is sized to the filter model, not to the plumbing, so match it by model badge and confirm with the element count:\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eFind the model number on the filter label, or moulded into the lid or tank. It reads \u003cstrong\u003eZX310\u003c\/strong\u003e (or the Zodiac \u003cstrong\u003eZXC310\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli\u003eThis body, part \u003cstrong\u003e7821702\u003c\/strong\u003e, is the correct tank for the \u003cstrong\u003eZX 310 \/ ZXC 310\u003c\/strong\u003e only.\u003c\/li\u003e\n\u003cli\u003eConfirm physically: open the filter. The ZX 310 is a \u003cstrong\u003etwin-element\u003c\/strong\u003e tank — inside you will find \u003cstrong\u003etwo\u003c\/strong\u003e cartridge elements (78088) joined end-to-end by an \u003cstrong\u003eelement coupler (78078)\u003c\/strong\u003e. The single-element ZX filters (50 to 250) do not have a coupler.\u003c\/li\u003e\n\u003cli\u003eIf your badge reads ZX310 and you have two elements with a coupler, this is your body. A single-element ZX needs a different, shorter tank — see the chooser below. Note: \u003cstrong\u003eAstralpool XC\u003c\/strong\u003e is a separate, unrelated series and does not use this tank.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eWorked Example\u003c\/h3\u003e\u003cp\u003eA customer at Gisborne has a tall filter with an unreadable label. They open it and find \u003cstrong\u003etwo\u003c\/strong\u003e stacked cartridge elements joined by a plastic coupler in the middle, and the tank shoulder is moulded \u003cstrong\u003eZX310\u003c\/strong\u003e. Twin element + coupler + ZX310 badge — so this \u003cstrong\u003e7821702\u003c\/strong\u003e body is correct. They order the body with a new tank O-ring (78110), a fresh pair of 78088 elements and a new 78078 coupler, since the old coupler is usually as tired as the tank.\u003c\/p\u003e\u003ch3\u003eWhich Tank Body Do I Need?\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYour model badge\u003c\/th\u003e\n\u003cth\u003eElement\u003c\/th\u003e\n\u003cth\u003eTank body\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eZX50 \/ ZX75 (ZXC50 \/ ZXC75)\u003c\/td\u003e\n\u003ctd\u003e230mm dia, short 290mm\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-zx-50-zx-75-filter-tank-body\"\u003eZX50\/75 body — 7821102\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZX100 \/ ZX150 (ZXC100 \/ ZXC150)\u003c\/td\u003e\n\u003ctd\u003e230mm dia\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx100-150-filter\"\u003eZX100\/150 body — 7821202\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZX200 \/ ZX250 (ZXC200 \/ ZXC250)\u003c\/td\u003e\n\u003ctd\u003e230mm dia, tall 688mm\u003c\/td\u003e\n\u003ctd\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx200-250-filter\"\u003eZX200\/250 body — 7821302\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZX310 (ZXC310)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003etwin element + coupler\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eThis body — 7821702\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAstralpool XC (unrelated series)\u003c\/td\u003e\n\u003ctd\u003edifferent filter\u003c\/td\u003e\n\u003ctd\u003eNot this family — \u003ca href=\"mailto:info@hasp.com.au\"\u003econtact us\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWill Not Fit — Order The Correct Tank Instead\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZX50 \/ ZX75 (ZXC50\/75)\u003c\/strong\u003e — short single-element tank. \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-zx-50-zx-75-filter-tank-body\"\u003eUse the ZX50\/75 body (7821102)\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZX100 \/ ZX150 (ZXC100\/150)\u003c\/strong\u003e — single-element tank. \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx100-150-filter\"\u003eUse the ZX100\/150 body (7821202)\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZX200 \/ ZX250 (ZXC200\/250)\u003c\/strong\u003e — single-element tall tank. \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx200-250-filter\"\u003eUse the ZX200\/250 body (7821302)\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstralpool XC\u003c\/strong\u003e — a separate, unrelated filter series. The XC tank is not interchangeable with the ZX \/ ZXC tank despite the similar name. \u003ca href=\"mailto:info@hasp.com.au\"\u003eContact us\u003c\/a\u003e with your model and a photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHurlcon QX\u003c\/strong\u003e — a different filter with a 222mm lid, not part of the ZX family.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Filters — ZX 310 Twin-Element\u003c\/h3\u003e\u003cp\u003eThis 7821702 tank body serves the 310 in each of these — all the same filter under different badges:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstralpool ZX \/ Hurlcon ZX:\u003c\/strong\u003e ZX310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZodiac ZXC:\u003c\/strong\u003e ZXC310\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltrite CF \/ Aquatight:\u003c\/strong\u003e ZX310-equivalent twin-element cartridge filters built on the ZX 310 tank\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eMatching cartridge elements: \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/zx310-cartridge\"\u003eZX310 elements — 78088, supplied as a pair\u003c\/a\u003e · joined with the \u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/joiner-zx-310-element-coupler\"\u003eelement coupler — 78078\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eZX \/ ZXC 310 filter tank body (lower pressure vessel), part 7821702\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e lid assembly, tank O-ring, cartridge elements, element coupler, pressure gauge and plumbing unions are separate items. Fit a new tank O-ring whenever you replace a tank — the old seal has taken a set to the old tank's sealing face.\u003c\/p\u003e\u003ch3\u003eMeasurements \u0026amp; Identification\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits model:\u003c\/strong\u003e ZX310 \/ ZXC310 (twin-element)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElements:\u003c\/strong\u003e two 78088 elements joined by the 78078 coupler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e 7821702 (supplied as SP7821702)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSymptoms Of A Failed Tank\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eA crack, split or weep low on the tank body, below the lid seal\u003c\/li\u003e\n\u003cli\u003eWater tracking down the outside of the tank when the pump runs\u003c\/li\u003e\n\u003cli\u003eCrazing or brittleness in the moulding from years of UV exposure\u003c\/li\u003e\n\u003cli\u003eA tank that has been over-pressurised, distorted or impact-damaged\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitting Notes \u0026amp; Safety\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThese are pressure vessels.\u003c\/strong\u003e Never work on the filter with the pump running or the system pressurised. Shut down, isolate power, close valves and release all pressure at the air bleed before you start.\u003c\/li\u003e\n\u003cli\u003eTransfer your fittings — drain cap, union tails and any bulkhead fittings — to the new tank, renewing their O-rings.\u003c\/li\u003e\n\u003cli\u003eFit a fresh tank O-ring and lubricate it with a silicone-based lubricant only. Petroleum grease swells and destroys the seal.\u003c\/li\u003e\n\u003cli\u003eCheck the element coupler when the tank is apart — a split coupler lets unfiltered water bypass both elements.\u003c\/li\u003e\n\u003cli\u003eHand-tighten the locking ring only. Over-tightening is what cracks lids and rings — and a fresh tank deserves a fresh start.\u003c\/li\u003e\n\u003cli\u003eOn recommissioning, open the air bleed until water flows steadily, close it, and note the clean starting pressure on the gauge. Clean the elements when pressure climbs 15–20 kPa above that figure.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eRelated ZX \/ ZXC Filter Parts\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/joiner-zx-310-element-coupler\"\u003eZX310 element coupler — 78078\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/lid-for-astralpool-zx-smart-cartridge-filters\"\u003eZX \/ ZXC lid assembly with handles \u0026amp; locking ring — SP7820502\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/o-ring-for-astralpool-hurlcon-zx-cartridge-filters\"\u003eZX \/ ZXC tank O-ring (lid seal) — 78110 \/ 78105\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/air-bleed-release\"\u003eZX \/ ZXC air bleed plug \u0026amp; O-ring\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/heaterandspaparts.com.au\/products\/astralpool-zx-cartridge-filter-and-spare-parts\"\u003eFull Astralpool ZX \/ Zodiac ZXC cartridge filter range \u0026amp; spare parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePart Numbers \u0026amp; Search References\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eThis tank body:\u003c\/strong\u003e 7821702 · SP7821702 · Body Only ZX310 · Astralpool ZX310 tank · Zodiac ZXC310 filter body · Hurlcon ZX310 filter body · twin-element ZX filter housing · Filtrite CF310 body · Aquatight ZX310 tank · Astral pool filter tank replacement.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eIs this the tank for the twin-element ZX310?\u003c\/strong\u003e\u003cbr\u003eYes. Part 7821702 is the ZX310 tank body. The ZX310 runs two 78088 elements joined by the 78078 coupler inside this one tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know I have a ZX310 and not a smaller ZX?\u003c\/strong\u003e\u003cbr\u003eRead the model number on the filter label or moulded into the tank, and open the filter. The ZX310 reads ZX310 or ZXC310 and has two elements joined by a coupler. A single element with no coupler means a smaller ZX and a different tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMy filter is a Zodiac ZXC. Is this the right body?\u003c\/strong\u003e\u003cbr\u003eYes. The Zodiac ZXC is the same filter as the Astralpool ZX, just Zodiac-badged. If it reads ZXC310, this 7821702 body is correct.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eMy filter is an Astralpool XC. Is this the right body?\u003c\/strong\u003e\u003cbr\u003eNo. The XC is a separate, unrelated filter series and does not share the ZX \/ ZXC tank body. Contact us with your model and a photo and we will match the correct part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the body come with the lid, O-ring, elements or coupler?\u003c\/strong\u003e\u003cbr\u003eNo. The tank body is supplied on its own. The lid assembly, tank O-ring, cartridge elements and coupler are separate items, all linked on this page. Fit a new O-ring whenever you replace a tank.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe ZX range is discontinued. Can I still get this body?\u003c\/strong\u003e\u003cbr\u003eYes. The ZX filter range has been superseded, but the serviceable parts including this tank body are still available. Replacing a tank on an otherwise sound filter is far cheaper than a whole new unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Astralpool part?\u003c\/strong\u003e\u003cbr\u003eYes. This is the genuine Astralpool tank body, part 7821702. It is a special-order item.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I replace the tank body rather than the whole filter?\u003c\/strong\u003e\u003cbr\u003eA cracked or leaking tank is usually the only failed component. If your lid, ring, gauge and plumbing are sound, replacing just the body restores the filter at a fraction of the cost of a new one.\u003c\/p\u003e\u003ch3\u003eManufacturer Catalogues, Diagrams \u0026amp; Part Numbers\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNeed exploded views, spare part numbers, product numbers, diagrams, or more product information?\u003c\/strong\u003e 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\/p\u003e\u003cp\u003eAs with all products, these must be diagnosed and fitted by a qualified and experienced person. This is a \u003ca href=\"https:\/\/heaterandspaparts.com.au\/policies\/refund-policy\" rel=\"noopener\" target=\"_blank\"\u003especial-order\u003c\/a\u003e item.\u003c\/p\u003e\u003c!-- \/HASP-FLP-1.0 7821702 canary-end zx-body-x310-echo --\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx-310-filter#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is this the tank for the twin-element ZX310?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Part 7821702 is the ZX310 tank body. The ZX310 runs two 78088 elements joined by the 78078 coupler inside this one tank.\"}},{\"@type\":\"Question\",\"name\":\"How do I know I have a ZX310 and not a smaller ZX?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Read the model number on the filter label or moulded into the tank, and open the filter. The ZX310 reads ZX310 or ZXC310 and has two elements joined by a coupler. A single element with no coupler means a smaller ZX and a different tank.\"}},{\"@type\":\"Question\",\"name\":\"My filter is a Zodiac ZXC. Is this the right body?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The Zodiac ZXC is the same filter as the Astralpool ZX, just Zodiac-badged. If it reads ZXC310, this 7821702 body is correct.\"}},{\"@type\":\"Question\",\"name\":\"My filter is an Astralpool XC. Is this the right body?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The XC is a separate, unrelated filter series and does not share the ZX \/ ZXC tank body. Contact us with your model and a photo and we will match the correct part.\"}},{\"@type\":\"Question\",\"name\":\"Does the body come with the lid, O-ring, elements or coupler?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The tank body is supplied on its own. The lid assembly, tank O-ring, cartridge elements and coupler are separate items, all linked on this page. Fit a new O-ring whenever you replace a tank.\"}},{\"@type\":\"Question\",\"name\":\"The ZX range is discontinued. Can I still get this body?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. The ZX filter range has been superseded, but the serviceable parts including this tank body are still available. Replacing a tank on an otherwise sound filter is far cheaper than a whole new unit.\"}},{\"@type\":\"Question\",\"name\":\"Is this a genuine Astralpool part?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. This is the genuine Astralpool tank body, part 7821702. It is a special-order item.\"}},{\"@type\":\"Question\",\"name\":\"Why would I replace the tank body rather than the whole filter?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A cracked or leaking tank is usually the only failed component. If your lid, ring, gauge and plumbing are sound, replacing just the body restores the filter at a fraction of the cost of a new one.\"}}]},{\"@type\":\"HowTo\",\"@id\":\"https:\/\/heaterandspaparts.com.au\/products\/body-only-zx-310-filter#howto\",\"name\":\"How to replace the tank body on an Astralpool ZX310 cartridge filter\",\"step\":[{\"@type\":\"HowToStep\",\"name\":\"Isolate and depressurise\",\"text\":\"Shut down the pump, isolate power, close the isolation valves and open the air bleed to release all pressure. Confirm the gauge reads zero.\"},{\"@type\":\"HowToStep\",\"name\":\"Open and empty the filter\",\"text\":\"Undo the locking ring, lift off the lid and remove both cartridge elements and the coupler. Drain the tank.\"},{\"@type\":\"HowToStep\",\"name\":\"Disconnect the plumbing\",\"text\":\"Undo the barrel unions at the inlet and outlet and free the tank from the plumbing.\"},{\"@type\":\"HowToStep\",\"name\":\"Transfer fittings to the new tank\",\"text\":\"Move the drain cap, union tails and any bulkhead fittings to the new 7821702 body, renewing their O-rings.\"},{\"@type\":\"HowToStep\",\"name\":\"Fit a new tank O-ring\",\"text\":\"Clean the sealing face, fit a new tank O-ring (78110) and lubricate it with a silicone-based lubricant only.\"},{\"@type\":\"HowToStep\",\"name\":\"Reassemble and recommission\",\"text\":\"Refit the coupled element pair and lid, hand-tighten the locking ring, reconnect the unions, then open the air bleed on start-up until water flows and note the clean starting pressure.\"}]}]}\u003c\/script\u003e","brand":"FLUIDRA","offers":[{"title":"Default Title","offer_id":46836082704573,"sku":"7821702","price":851.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/astralpool-zodiac-body-only-zx-310-filter-7821702-619.webp?v=1780374501","url":"https:\/\/heaterandspaparts.com.au\/zh-hant\/products\/body-only-zx-310-filter","provider":"Heater and Spa Parts","version":"1.0","type":"link"}