{"id":10144,"date":"2026-03-19T16:39:22","date_gmt":"2026-03-19T14:39:22","guid":{"rendered":"https:\/\/vestelli-fi.kehityspalvelin.fi\/tuote\/separate-drainage-extra-low-iisi-3000-closed-tank-iisi-h4-grey-water-filter\/"},"modified":"2026-07-08T16:08:30","modified_gmt":"2026-07-08T13:08:30","slug":"separate-drainage-extra-low-iisi-3000-closed-tank-iisi-h4-grey-water-filter","status":"publish","type":"product","link":"https:\/\/vestelli-fi.kehityspalvelin.fi\/en\/tuote\/separate-drainage-extra-low-iisi-3000-closed-tank-iisi-h4-grey-water-filter\/","title":{"rendered":"Separate drainage Extra low IISI 3000 Closed tank + IISI H4 Grey water filter"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p><span style=\"color: #333333;\"><strong>Price from \u20ac4,740.00<\/strong><\/span><\/p>\n<p><span style=\"color: #333333;\">Separate sewage is a good method for treating all domestic wastewater in a property, both in a detached house and a holiday home. Toilet water is directed to a closed tank and washing water to a greywater treatment plant. <\/span><\/p>\n<p><span style=\"color: #333333;\">The properties <a href=\"\/fi\/produkt\/erikoismatala-iisi-3000-umpisailio\/\" target=\"_blank\" rel=\"noopener\"><span style=\"color: #2dccd3;\"><strong>of the extra-low IISI 3000 closed container<\/strong><\/span><\/a> are in a class of their own and their strength properties are still 100% present when the durability limits of a conventional closed container have already been reached.<\/span><\/p>\n<ul>\n<li><span style=\"color: #333333;\">200% higher permissible groundwater level in the soil<\/span><\/li>\n<li><span style=\"color: #333333;\">50% lower installation trench requirement below the inlet drain<\/span><\/li>\n<li><span style=\"color: #333333;\">25% higher permitted soil fill on top of the tank<\/span><\/li>\n<li><span style=\"color: #333333;\">three service pipe options, 200 mm and large service pipes 450 and 800 mm<\/span><\/li>\n<li><span style=\"color: #333333;\">ultra-low and strength-optimized design<\/span><\/li>\n<li><span style=\"color: #333333;\">made from the best raw materials without sparing them<\/span><\/li>\n<li><span style=\"color: #333333;\">environmentally friendly 100% recyclable raw material is also food grade<\/span><\/li>\n<\/ul>\n<p><a href=\"\/fi\/produkt\/iisi-h4-harmaavesisuodatin\/\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"color: #2dccd3;\">The IISI H4 Greywater Filter<\/span><\/strong><\/a> effectively cleans 500 L of washing water per day. It is suitable for cleaning washing water in a well-equipped holiday home. <\/p>\n<p>The cleaning is done biologically and the water flows through the filter by gravity. No need for a filtration field, no chemicals, no electricity, no replaceable components, no peat etc. replacement. Easy and hassle-free cleaning of grey water.   <\/p>\n<p>Suitable for:<\/p>\n<ul>\n<li>for holiday homes with dishwasher and\/or shower, sink<\/li>\n<li>also well suited for coastal areas and areas with stricter cleaning requirements<\/li>\n<li>for holiday homes for continuous and periodic use<\/li>\n<li>can be installed on all plots and soil<\/li>\n<\/ul>\n","protected":false},"featured_media":10146,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[142,137],"product_tag":[],"class_list":["post-10144","product","type-product","status-publish","has-post-thumbnail","product_cat-greywater-treatment-for-cottages","product_cat-septic-tanks","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Separate drainage Extra low IISI 3000 Closed tank + IISI H4 Grey water filter | 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=\"Separate drainage Extra low IISI 3000 Closed tank + IISI H4 Grey water filter | Vestelli.fi\" \/>\n<meta property=\"og:description\" content=\"Price from \u20ac4,740.00 Separate sewage is a good method for treating all domestic wastewater in a property, both in a detached house and a holiday home. Toilet water is directed to a closed tank and washing water to a greywater treatment plant. The properties of the extra-low IISI 3000 closed container are in a class of their own and their strength properties are still 100% present when the durability limits of a conventional closed container have already been reached. 200% higher permissible groundwater level in the soil 50% lower installation trench requirement below the inlet drain 25% higher permitted soil fill on top of the tank three service pipe options, 200 mm and large service pipes 450 and 800 mm ultra-low and strength-optimized design made from the best raw materials without sparing them environmentally friendly 100% recyclable raw material is also food grade The IISI H4 Greywater Filter effectively cleans 500 L of washing water per day. It is suitable for cleaning washing water in a well-equipped holiday home. The cleaning is done biologically and the water flows through the filter by gravity. No need for a filtration field, no chemicals, no electricity, no replaceable components, no peat etc. replacement. Easy and hassle-free cleaning of grey water.  Suitable for: for holiday homes with dishwasher and\/or shower, sink also well suited for coastal areas and areas with stricter cleaning requirements for holiday homes for continuous and periodic use can be installed on all plots and soil\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vestelli-fi.kehityspalvelin.fi\/en\/tuote\/separate-drainage-extra-low-iisi-3000-closed-tank-iisi-h4-grey-water-filter\/\" \/>\n<meta property=\"og:site_name\" content=\"Vestelli.fi\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-08T13:08:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vestelli-fi.kehityspalvelin.fi\/wp-content\/uploads\/2026\/03\/3626473-Umpisailio-erikoismatala-3000-OD200-IISI-H4.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"1600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script 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