{"product_id":"o-ring-eca-ebric-lid-green","title":"Astralpool O-Ring, Valve to Tank (Tank Lid) Green - ECA550, ECA650 Sand Filter - 7201750057 \/ SP7201750057","description":"\u003c!-- HASP-FLP-1.0 | SKU 7201750057 | rule ECA-1.1 | canary: green-ring-clamp-band --\u003e\n\u003ch3\u003eAstralpool O-Ring, Valve to Tank (Tank Lid) Green - ECA550, ECA650 Sand Filter - 7201750057\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cstrong\u003eWe keep these physically in stock for fast shipping or local pick-up, 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\u003e\u003cstrong\u003e7201750057 is the genuine Astralpool O-ring that seals the multiport valve to the tank on ECA550 and ECA650 sand filters.\u003c\/strong\u003e On these top-mount filters the valve sits in the tank opening and acts as the lid, so the same green ring is listed as both the tank lid O-ring and the valve to tank O-ring. Astralpool's spare parts list calls it \"O-ring - ECA models\". The filters are also sold and listed as Hurlcon ECA and Astral ECA, and all of them take this ring.\u003c\/p\u003e\n\u003cp\u003eIf water weeps from the joint under the multiport valve while the clamp band is sound and correctly tightened, this O-ring is the usual cause.\u003c\/p\u003e\n\u003ch3\u003eThe Clamp Band Rule (rev. ECA-1.1)\u003c\/h3\u003e\n\u003cp\u003eAstralpool ECA, EC, CA and Cantabric sand filters look alike but do not all take this O-ring. Check these before ordering:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRead the model label on the tank. Astralpool lists 7201750057 for ECA models: ECA550 and ECA650.\u003c\/li\u003e\n\u003cli\u003eLook at how the multiport valve is held on. A clamp band around the neck of the tank and valve, tightened with a bolt, is the ECA arrangement this O-ring suits.\u003c\/li\u003e\n\u003cli\u003eA large threaded lock ring screwed onto the top of the tank means a CA or Cantabric filter. Order the CA \/ Cantabric O-ring, \u003ca href=\"\/products\/o-ring-ca-cantabric-lid\"\u003e7211820060\u003c\/a\u003e, instead.\u003c\/li\u003e\n\u003cli\u003eA clamp band on a tank labelled EC550 or EC650 (no \"A\") means an EC filter. EC filters also use a clamp band, but Astralpool lists 7201750057 for ECA models, so send us a photo of the label before ordering.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis follows Astralpool's own installation instructions: ECA and EC valves are secured with a clamp band assembly around the neck of the filter and valve, while CA and Cantabric valves are held by a lock ring tightened by hand.\u003c\/p\u003e\n\u003ch3\u003eWorked Example\u003c\/h3\u003e\n\u003cp\u003eSay an ECA650 has just had its sand replaced and now weeps from the joint under the multiport valve. The tank label reads ECA650 and the valve is held on by a clamp band, so it takes 7201750057. With the pump off and pressure released, check two things before ordering: that the clamp band is not cracked or distorted, and that no sand is left on the sealing surface of the tank opening. If both are fine and the old ring is flattened, nicked or out of shape, this O-ring is the fix. If the band is cracked, you need clamp band \u003ca href=\"\/products\/clamp-band-eca-complete\"\u003e77730\u003c\/a\u003e as well.\u003c\/p\u003e\n\u003ch3\u003eWhich Part Do I Need?\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eWhat you have\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eWhat to order\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eECA550 or ECA650, valve held by a clamp band, leak at the joint between valve and tank\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eThis O-ring, 7201750057\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eCA280, CA300, CA340 or CA400, or a Cantabric filter, valve held by a threaded lock ring\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003e\u003ca href=\"\/products\/o-ring-ca-cantabric-lid\"\u003eCA \/ Cantabric tank lid O-ring 7211820060\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eEC550 or EC650 (no \"A\"), valve held by a clamp band\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eNot confirmed for this O-ring. \u003ca href=\"mailto:shop@hasp.com.au\"\u003eSend us a photo\u003c\/a\u003e of the tank label first\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eECA clamp band cracked, distorted or no longer tightens\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003e\u003ca href=\"\/products\/clamp-band-eca-complete\"\u003eClamp band complete 77730\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eClamp band sound but the bolt is seized, stripped or missing\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003e\u003ca href=\"\/products\/comp-bag-eca-bolt-nut-a-key\"\u003eClamp band bolt, nut and Allen key kit 78399\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eLeak at one of the 40mm pipe connections on the valve, not the tank joint\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eUnion O-rings: \u003ca href=\"\/products\/astralpool-40mm-threaded-tail-o-ring\"\u003e40mm threaded tail O-ring 70008\u003c\/a\u003e or \u003ca href=\"\/products\/hurlcon-astralpool-40mm-oring\"\u003e40mm O-ring 75109\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003eWater running out the waste line with the valve set to Filter\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border-bottom: 1px solid #E1E3E4;\"\u003e\n\u003ca href=\"\/products\/spider-gasket-40mm-mpv-astral\"\u003eSpider gasket 75916\u003c\/a\u003e, inside the multiport valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat This O-Ring Does Not Fit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCA series (CA280, CA300, CA340, CA400) and Cantabric filters. Astralpool lists a separate O-ring for CA models, \u003ca href=\"\/products\/o-ring-ca-cantabric-lid\"\u003e7211820060\u003c\/a\u003e, and these filters use a threaded lock ring rather than a clamp band.\u003c\/li\u003e\n\u003cli\u003eEC550 and EC650 (no \"A\" in the model). These also use a clamp band, but they are a different filter family that takes a different multiport valve, \u003ca href=\"\/products\/mpv-40mm-suit-ec-filter\"\u003e76037\u003c\/a\u003e. We have not confirmed this O-ring for EC filters, so send us a photo of your tank label before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSigns This O-Ring Has Failed\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWater weeping or spraying from the joint between the multiport valve and the top of the tank, with the clamp band sound and correctly tightened.\u003c\/li\u003e\n\u003cli\u003eA leak that starts after the valve has been lifted off, for example after a sand or glass media change.\u003c\/li\u003e\n\u003cli\u003eThe old ring is flattened, split, hardened, stretched or has taken a permanent set.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAs soon as it shows any of the signs above.\u003c\/li\u003e\n\u003cli\u003eAny time the multiport valve is lifted off the tank for media replacement. It is cheap insurance while you are in there.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitting Notes\u003c\/h3\u003e\n\u003cp\u003eBased on Astralpool's installation instructions for ECA filters:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eTurn the pump off and release system pressure before loosening the clamp band. The valve to tank joint is a pressure joint, and Astralpool rates ECA filters to a maximum operating pressure of 200 kPa.\u003c\/li\u003e\n\u003cli\u003eRemove the clamp band and lift the multiport valve clear of the tank.\u003c\/li\u003e\n\u003cli\u003eRemove the old O-ring and clean any sand or debris from the upper surface of the tank opening.\u003c\/li\u003e\n\u003cli\u003eLightly lubricate the new O-ring with a silicone-based lubricant and seat it in the cavity on the tank.\u003c\/li\u003e\n\u003cli\u003eLower the valve into the tank opening, making sure the O-ring stays in position.\u003c\/li\u003e\n\u003cli\u003eRefit the clamp band and tighten it enough for good engagement. Astralpool notes it is not necessary to over-tighten.\u003c\/li\u003e\n\u003cli\u003eRestart the pump and check the joint for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart number: 7201750057\u003c\/li\u003e\n\u003cli\u003eAstralpool description: O-ring - ECA models\u003c\/li\u003e\n\u003cli\u003eFits: Astralpool ECA550 and ECA650 sand (media) filters, also listed as Hurlcon ECA and Astral ECA\u003c\/li\u003e\n\u003cli\u003eColour: green\u003c\/li\u003e\n\u003cli\u003ePosition: seats in the cavity on the tank opening, under the multiport valve\u003c\/li\u003e\n\u003cli\u003eFunction: valve to tank (tank lid) seal\u003c\/li\u003e\n\u003cli\u003eValve held by: clamp band \u003ca href=\"\/products\/clamp-band-eca-complete\"\u003e77730\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eBarcode: 9343609002619\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eRelated ECA Filter Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mpv-40mm-eca-filter\"\u003eMultiport Valve 40mm, ECA550 \/ ECA650 - 76036\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/clamp-band-eca-complete\"\u003eClamp Band ECA Complete - 77730\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/comp-bag-eca-bolt-nut-a-key\"\u003eClamp Band Bolt, Nut \u0026amp; Allen Key Kit - 78399\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/hub-eca-ca-model-media-fil\"\u003eLateral Hub, ECA \u0026amp; CA Media Filter - 77712\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/lateral-175mm-eca-ca-pair\"\u003eLaterals 175mm, Pair - 77756\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/drainage-plug-cap-ca-eca-fil\"\u003eDrain Plug Cap, CA \/ ECA - 77717\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/comp-bag-40mm-eca-multiport\"\u003eComponent Bag 40mm ECA Multiport - 78355\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the tank lid O-ring or the valve to tank O-ring?\u003c\/strong\u003e\u003cbr\u003eBoth. On the top-mount ECA550 and ECA650 the multiport valve sits in the tank opening and acts as the lid, so the tank lid O-ring and the valve to tank O-ring are the same seal. Astralpool lists it as part 7201750057, O-ring - ECA models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this O-ring fit a CA or Cantabric filter?\u003c\/strong\u003e\u003cbr\u003eNo. CA and Cantabric filters use O-ring 7211820060. This one suits the ECA series.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit a Hurlcon ECA filter?\u003c\/strong\u003e\u003cbr\u003eYes, if the tank label reads ECA550 or ECA650. These filters are also sold and listed as Hurlcon ECA and Astral ECA, and all of them use this O-ring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I tell an ECA filter from a CA or EC filter?\u003c\/strong\u003e\u003cbr\u003eRead the model label on the tank first. Then look at how the multiport valve is held on: ECA filters use a clamp band around the joint between valve and tank, while CA filters use a threaded lock ring. EC filters (EC550, EC650) also use a clamp band, so the label is what separates ECA from EC.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy ECA filter leaks where the valve meets the tank. Do I need a new clamp band?\u003c\/strong\u003e\u003cbr\u003eOnly if the band is cracked, distorted or will no longer tighten. If the band is sound but the bolt is seized or missing, the bolt, nut and Allen key kit 78399 is the fix. If the band and bolt are both sound, this O-ring is the more likely cause.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does my filter leak after a sand change?\u003c\/strong\u003e\u003cbr\u003eCheck two things first: sand or debris left on the sealing surface of the tank opening, and whether the O-ring moved out of its cavity when the valve was lowered. Astralpool's instructions are to clean the tank opening and make sure the O-ring stays in position as the valve goes on. If the ring is flattened or damaged, replace it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShould I lubricate the O-ring on fitting?\u003c\/strong\u003e\u003cbr\u003eUse a silicone-based lubricant suitable for pool equipment. Do not use petroleum-based grease, which degrades the rubber.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow tight should the clamp band be?\u003c\/strong\u003e\u003cbr\u003eAstralpool's instructions are to tighten it enough for good engagement, and they note it is not necessary to over-tighten. Over-tightening distorts the band and will not cure a leaking seal.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a genuine Astralpool part?\u003c\/strong\u003e\u003cbr\u003eYes. Heater and Spa Parts is an authorised Fluidra dealer and warranty agent, and this is the genuine Astralpool O-ring, part 7201750057.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eCommon search terms: 7201750057, Astralpool ECA O-ring, Astral ECA filter O-ring, Hurlcon ECA valve to tank O-ring, ECA650 lid O-ring, ECA550 lid O-ring, ECA sand filter tank O-ring, Astral media filter valve to tank O-ring, green O-ring Astral sand filter, ECA filter lid seal, WWDG SpaPro.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eManufacturer Catalogues, Diagrams \u0026amp; Part Numbers:\u003c\/span\u003e\u003c\/strong\u003e Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues below.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e \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\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eImportant Before Ordering:\u003c\/span\u003e\u003c\/strong\u003e Please ensure you order correctly. Confirm this product is suitable before ordering. Use the catalogues above, seek professional assistance, or \u003ca href=\"mailto:shop@hasp.com.au\"\u003econtact us\u003c\/a\u003e with photos of your existing part, model details, serial numbers, and any labels.\u003c\/p\u003e\n\u003cp\u003eAs with all products, these must be diagnosed and fitted by a qualified and experienced person.\u003c\/p\u003e\n\u003chr\u003e\u003c!-- HASP-FLP-1.0 end | canary: green-ring-clamp-band --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FLUIDRA","offers":[{"title":"Default Title","offer_id":46836082540733,"sku":"SP7201750057","price":18.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0372\/5253\/files\/astralpool-o-ring-valve-to-tank-lid-green-eca550-eca650-sand-filter-7201750057-sp7201750057-184.webp?v=1791164407","url":"https:\/\/hasp.com.au\/products\/o-ring-eca-ebric-lid-green","provider":"Heater and Spa Parts","version":"1.0","type":"link"}