{"product_id":"axeon-hf4-4040-4-x-40-2500-gpd-ro-membrane-100psi-200391","title":"AXEON HF4-4040 RO Membrane 2500 GPD 100 PSI Extra Low Energy 4\" x 40\" - 200391","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe AXEON HF4-4040, part number \u003ccode class=\"bg-text-200\/5 border border-0.5 border-border-300 text-danger-000 whitespace-pre-wrap rounded-[0.4rem] px-1 py-px text-[0.9rem] inline-flex items-center h-5\"\u003e200391,\u003c\/code\u003e is a 4\" x 40\" extra-low-energy reverse osmosis element that produces up to 2,500 gallons per day at just 100 PSI of applied pressure. It's the drop-in replacement for standard 4040 commercial RO systems where you want full output without running a high-pressure pump.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eAt a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\" dir=\"ltr\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e 2,500 GPD at 100 PSI\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSalt rejection:\u003c\/strong\u003e 99% nominal (96% minimum)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4\" x 40\" — fits nominal 4.00\" I.D. housings\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMembrane:\u003c\/strong\u003e Polyamide thin-film composite, spiral wound\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eShipped:\u003c\/strong\u003e Dry — indefinite shelf life\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePart numbers:\u003c\/strong\u003e AXEON 200391 \/ HF4-4040\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eWhy 100 PSI matters\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eMost 4040 elements need 150–225 PSI to hit their rated flow. The HF4 hits 2,500 GPD at 100 PSI, which means a smaller booster pump, less electricity per gallon produced, and less standing pressure on your fittings, housings, and tubing. If you're currently running an HF1-4040 (200379, 150 PSI) or HR3-4040 (200373, 225 PSI), the HF4 is the direct energy-savings upgrade at the same footprint.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\" class=\"mt-2 -mb-1 text-base font-bold\"\u003eWhat systems does the HF4-4040 fit?\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe HF4-4040 is a standard 4\" x 40\" element with a 0.75\" male product tube, so it fits any nominal 4.00\" I.D. membrane housing — PVC, stainless, or FRP. If your system takes a 4040 membrane, this one fits.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eIt's commonly used in AXEON commercial and light commercial RO systems built around 4040 housings, including the BT-1800 (1,800 GPD), the CT-4000, CT-5000, and CT-7000 (4,000 to 7,000 GPD), the JT-2000 and JT-4000 (2,000 and 4,000 GPD), and the N-Series including the N-2000 — along with most OEM and third-party commercial systems that use 4040 elements.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eReplaces these 100 PSI extra low energy elements:\u003c\/strong\u003e XLE-4040 (DuPont \/ DOW FilmTec), TMH10A (Toray), and comparable XLE-class 4040 membranes.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eUpgrading from a higher-pressure element?\u003c\/strong\u003e The HF4-4040 produces the same 2,500 GPD as the AXEON HF1-40\u003c\/p\u003e","brand":"AXEON","offers":[{"title":"Default Title","offer_id":43672097620149,"sku":"200391","price":369.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0629\/1197\/1509\/files\/axeon-axeon-hf4-4040-4-x-40-2500-gpd-ro-membrane-100psi-200391-200391__40764.1691428653.1280.1280.jpg?v=1719457431","url":"https:\/\/ispwaterproducts.com\/products\/axeon-hf4-4040-4-x-40-2500-gpd-ro-membrane-100psi-200391","provider":"ESP Water","version":"1.0","type":"link"}