{"product_id":"enviro-et-air-pump","title":"Enviro ET Air Pump – 30, 40 \u0026 60 L\/min Linear Diaphragm","description":"\u003ch2\u003eContinuous-duty linear diaphragm air pumps for big reservoirs and multi-bucket DWC\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eEnviro ET\u003c\/strong\u003e range is a set of British-built \u003cstrong\u003elinear diaphragm air pumps\u003c\/strong\u003e, made by Charles Austen Pumps in Surrey and distributed in the UK by Hailea. They are oil-free, so the air reaching your nutrient never carries lubricant, and they are rated for \u003cstrong\u003econtinuous duty\u003c\/strong\u003e with a thermal cut-out and a weatherproof case for indoor or outdoor use. Three outputs: \u003cstrong\u003eET30 at 30 L\/min\u003c\/strong\u003e, \u003cstrong\u003eET40 at 40 L\/min\u003c\/strong\u003e and \u003cstrong\u003eET60 at 60 L\/min\u003c\/strong\u003e, all rated at \u003cstrong\u003e0.12 bar\u003c\/strong\u003e - enough pressure to push air through deep buckets and long runs of stones. \u003cstrong\u003eSingle outlet; a manifold is not included\u003c\/strong\u003e - add one of our Hailea manifolds to split the feed.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal pressure, not just flow\u003c\/strong\u003e - 0.12 bar at rated output, so stones at the bottom of deep DWC buckets still bubble hard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil-free linear diaphragm\u003c\/strong\u003e - clean air, low noise (the trade quotes around 35-40 dB), no wear parts to lubricate\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous duty\u003c\/strong\u003e with thermal protection - built to run 24\/7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeatherproof\u003c\/strong\u003e - indoor or outdoor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eServiceable\u003c\/strong\u003e - an 18-month service interval with manufacturer service kits, so the pump outlasts a throwaway\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBritish-made\u003c\/strong\u003e by Charles Austen Pumps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStarved roots at the bottom of the bucket\u003c\/h3\u003e\n\u003cp\u003eA low-pressure pump looks fine on one stone in a shallow tank and dies back to a trickle across eight stones in 20-litre buckets, because every centimetre of water depth costs pressure. \u003cstrong\u003eDissolved oxygen\u003c\/strong\u003e then falls exactly where the roots are, and \u003cstrong\u003eroot rot\u003c\/strong\u003e follows. The ET's 0.12 bar rating is the number that matters for deep water culture.\u003c\/p\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSite the pump above the water line\u003c\/strong\u003e or fit a non-return valve, so a power cut cannot siphon nutrient into it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit a manifold\u003c\/strong\u003e to the single outlet - 14mm on the ET30 and ET40, 18mm on the ET60 - then run 4mm airline to each stone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizing guide:\u003c\/strong\u003e ET30 about 8-12 stones or reservoirs to roughly 350L; ET40 about 10-16 stones or 500L; ET60 about 16-24 stones or 600L and up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the intake filter clean\u003c\/strong\u003e and service the diaphragm every 18 months.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e linear diaphragm air pump, oil-free, continuous duty\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eET30:\u003c\/strong\u003e 30 L\/min at 0.12 bar, 25W, 14mm outlet, 208 x 150 x 178mm, 4.0kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eET40:\u003c\/strong\u003e 40 L\/min at 0.12 bar, 30W, 14mm outlet, 218 x 156 x 182mm, 4.3kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eET60:\u003c\/strong\u003e 60 L\/min at 0.12 bar, 55W, 18mm outlet, 203 x 165 x 153mm, 6.0kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlets:\u003c\/strong\u003e single, rubber elbow supplied; manifold not included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e thermal cut-out; weatherproof case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService:\u003c\/strong\u003e every 18 months, service kits available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 240V, 50Hz, UK plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Charles Austen Pumps Ltd, Byfleet, Surrey; UK distribution by Hailea\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n","brand":"Hailea","offers":[{"title":"ET30 (30 L\/min)","offer_id":53619704332554,"sku":"HYD-HAIL-008-01","price":80.36,"currency_code":"GBP","in_stock":true},{"title":"ET40 (40 L\/min)","offer_id":53619704463626,"sku":"HYD-HAIL-008-02","price":93.21,"currency_code":"GBP","in_stock":true},{"title":"ET60 (60 L\/min)","offer_id":53619704496394,"sku":"HYD-HAIL-008-03","price":109.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/enviro-et-air-pump-et30-1.jpg?v=1788375129","url":"https:\/\/hydrocropshop.co.uk\/products\/enviro-et-air-pump","provider":"Hydro Crop Shop","version":"1.0","type":"link"}