{"id":9875,"date":"2026-03-19T16:38:23","date_gmt":"2026-03-19T14:38:23","guid":{"rendered":"https:\/\/vestelli-fi.kehityspalvelin.fi\/tuote\/closed-tank-extra-low-iisi-3000-package\/"},"modified":"2026-07-08T16:05:58","modified_gmt":"2026-07-08T13:05:58","slug":"closed-tank-extra-low-iisi-3000-package","status":"publish","type":"product","link":"https:\/\/vestelli-fi.kehityspalvelin.fi\/en\/tuote\/closed-tank-extra-low-iisi-3000-package\/","title":{"rendered":"Closed tank extra low IISI 3000 package"},"content":{"rendered":"<h3><strong>Closed tank extra low IISI 3000 package \u2013 a space-saving solution for demanding applications<\/strong><\/h3>\n<p>The closed tank extra-low IISI 3000 package is designed specifically for sites where installation depth is limited and a reliable and easy-to-use solution for wastewater recovery is needed. The tank&#8217;s extra-low structure (only 77 cm from the bottom to the drain water outlet) allows for a shallower trench, which makes installation easier and reduces costs. <\/p>\n<p>The bottom of the tank is closer to the ground, which means it is not as exposed to the buoyancy caused by groundwater and runoff. This makes the IISI 3000 closed tank a safe and long-lasting choice even in challenging conditions, such as rocky or high-bottomed plots. <\/p>\n<h3><strong>Strong and tested construction<\/strong><\/h3>\n<p>The IISI 3000 extra-low closed tank is made of high-quality and environmentally friendly raw materials. Its design is optimized to withstand soil stresses and has been tested in accordance with the EN12566 standard. The extra-low tank offers several advantages:  <\/p>\n<ul>\n<li>50% lower excavation requirement below the inlet sewer<\/li>\n<li>200% higher permissible groundwater level compared to conventional closed tanks<\/li>\n<li>25% higher permitted soil fill on top of the tank<\/li>\n<li>Large service pipes (450 and 800 mm) facilitate operation and maintenance<\/li>\n<\/ul>\n<h3><strong>Delivery content<\/strong><\/h3>\n<ul>\n<li>1 pc Closed tank extra low 3000 L<\/li>\n<li>1 pc OD 200 mm service pipe and cover<\/li>\n<li>1 pc. Full alarm<\/li>\n<li>1 pc Anchoring kit<\/li>\n<\/ul>\n<h3><strong>An environmentally friendly and safe choice<\/strong><\/h3>\n<p>A closed tank is always the best option for nature, as all wastewater is collected and transported away without burdening the environment and waterways. With the extra-low IISI 3000 closed tank, this can be easily achieved even on plots where installing a conventional tank would be difficult. <\/p>\n<p>Read more <\/p>\n<h3><\/h3>\n<h3><strong>Documents<\/strong><\/h3>\n<p><strong><a href=\"\/wp-content\/uploads\/2023\/06\/3626356-Umpisailio-3000L_OD450-Erikoismatala_leikkauspiirustus.pdf\" target=\"_blank\" rel=\"noopener\">Special low IISI 3000 sectional drawing (PDF)<\/a> <\/strong><\/p>\n<p><strong><a href=\"\/wp-content\/uploads\/2022\/08\/IISI-Erikoismatalat-umpisailiot-asennusohje_FIN_2022_08.pdf\" target=\"_blank\" rel=\"noopener\">Extra-low IISI sump tanks installation instructions (PDF)<\/a> <\/strong><\/p>\n<p><strong><a href=\"\/wp-content\/uploads\/2023\/02\/IISI-Erikoismatala-umpisailio-3000-tuotekortti_2023.pdf\" target=\"_blank\" rel=\"noopener\">Special low IISI 3000 product card (PDF)<\/a><\/strong><\/p>\n<p>The product is sold and delivered <strong>by Avalon Nordic Oy<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-avalon-nordic-logo\" src=\"\/wp-content\/uploads\/2026\/03\/avalon-nordic-logo_word-300x116.jpg\" alt=\"Avalon Nordic\" width=\"300\" height=\"116\"><\/p>\n<p><em>Vestelli Oy has acquired the entire share capital of Avalon Nordic Oy. <a href=\"\/en\/vestelli-oy-press-release-vestelli-oy-and-avalon-nordic-oy-join-forces\/\">Read more about the acquisition<\/a> <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The closed tank extra-low IISI 3000 package is designed specifically for sites where installation depth is limited and a reliable and easy-to-use solution for wastewater recovery is needed. The tank&#8217;s extra-low structure (only 77 cm from the bottom to the drain water outlet) allows for a shallower trench, which makes installation easier and reduces costs.<\/p>\n","protected":false},"featured_media":9877,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[137,136],"product_tag":[],"class_list":["post-9875","product","type-product","status-publish","has-post-thumbnail","product_cat-septic-tanks","product_cat-wastewater-treatment-systems","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Closed tank extra low IISI 3000 package | Vestelli.fi<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Closed tank extra low IISI 3000 package | Vestelli.fi\" \/>\n<meta property=\"og:description\" content=\"The closed tank extra-low IISI 3000 package is designed specifically for sites where installation depth is limited and a reliable and easy-to-use solution for wastewater recovery is needed. The tank&#039;s extra-low structure (only 77 cm from the bottom to the drain water outlet) allows for a shallower trench, which makes installation easier and reduces costs.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vestelli-fi.kehityspalvelin.fi\/en\/tuote\/closed-tank-extra-low-iisi-3000-package\/\" \/>\n<meta property=\"og:site_name\" content=\"Vestelli.fi\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-08T13:05:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vestelli-fi.kehityspalvelin.fi\/wp-content\/uploads\/2026\/03\/AVA3626354PKT_Umpisailiopaketti_nettikuva.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" 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