{"product_id":"knifel-submersible-water-pump-25w-400gph-1500l-h-adjustable-flow-quiet-operation-9-8ft-cord","title":"Knifel Submersible Water Pump 25W 400GPH (1500L\/h) — Adjustable Flow, Quiet Operation, 9.8ft Cord","description":"\u003cp\u003e\u003cstrong\u003eThe Knifel 25W submersible water pump is a compact, adjustable-flow pump that delivers around 400GPH (up to 450GPH max) for aquariums, ponds, fountains and hydroponic setups while running quietly and reliably.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis pump combines a low-profile housing with an adjustable rotary flow control, three nozzle options, and a grounded power cord to give flexible placement and tailored water movement. Built for continuous submersion, it balances useful head height and flow for small- to medium-sized water systems. Below are practical answers to common buyer questions so you can decide whether this pump fits your project.\u003c\/p\u003e\n\n\u003ch3\u003eHow much water can this pump move and how high can it lift?\u003c\/h3\u003e\n\u003cp\u003eThe Knifel 25W motor typically delivers about 400 gallons per hour (approx. 1500 L\/h) under normal conditions and can reach a maximum flow around 450 GPH depending on voltage and piping. Maximum head is about 6.5 feet (roughly 8.2ft listed max head in some specs), so it suits most indoor fountains, small ponds, and hydroponic recirculation systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical flow: ~400 GPH (1500 L\/h)\u003c\/li\u003e\n  \u003cli\u003eMaximum advertised flow: up to 450 GPH (subject to tolerance)\u003c\/li\u003e\n  \u003cli\u003eWorking head: effective lift for most small-scale setups\u003c\/li\u003e\n  \u003cli\u003eFlow reduced when piping or outlet restrictions are added\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan I control the flow and how noisy is it?\u003c\/h3\u003e\n\u003cp\u003eThe pump includes a rotary flow control knob so you can dial water movement from a gentle current to stronger circulation, useful for delicate aquarium inhabitants or more vigorous pond filtration. It uses noise-reduction design and runs quietly in typical installations, but sound may increase if water level is too low or debris accumulates.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdjustable flow knob for precise control\u003c\/li\u003e\n  \u003cli\u003eQuiet operation for indoor\/outdoor use\u003c\/li\u003e\n  \u003cli\u003eNoise can increase with low water or rotor blockage\u003c\/li\u003e\n  \u003cli\u003eEasy disassembly for cleaning to restore silent performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat connections and accessories come with the pump?\u003c\/h3\u003e\n\u003cp\u003eThe pump ships with three outlet nozzles to fit common tubing sizes so you can match hose diameter to your installation and a short instruction manual. The grounded plug and cord let you place the pump where needed while meeting basic safety expectations — keep the cord positioned to avoid strain and water contact at the outlet.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes three nozzles (3\/4\", 5\/8\", 1\/2\") for flexible connections\u003c\/li\u003e\n  \u003cli\u003eComes with instruction manual and installed cord\u003c\/li\u003e\n  \u003cli\u003eGrounded plug for safer operation (use proper outdoor-rated outlet when required)\u003c\/li\u003e\n  \u003cli\u003eDetachable housing for tool-free maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I maintain the pump and avoid performance issues?\u003c\/h3\u003e\n\u003cp\u003eRoutine cleaning every two weeks is recommended for debris-prone environments; remove the housing and rinse the rotor and intake to prevent clogs. If the pump stops or gets noisy, check for trapped debris, clean the rotor, and ensure the motor runs on stable voltage within rated power.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eClean rotor and intake roughly every two weeks in debris-prone setups\u003c\/li\u003e\n  \u003cli\u003eUse a stable AC110–120V\/60Hz supply and avoid voltage drops\u003c\/li\u003e\n  \u003cli\u003eIf noisy, inspect and clear blockages; a little olive oil on the rotor is sometimes recommended\u003c\/li\u003e\n  \u003cli\u003eDo not run dry; maintain adequate water level to reduce noise and wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this pump is for: The Knifel 25W submersible pump is aimed at hobbyists and homeowners who need a compact, adjustable and economical water mover for aquariums, small garden ponds, tabletop fountains, hydroponic reservoirs, or water-transfer tasks. Choose this model if you want easy placement, tool-free cleaning, and the option to fine-tune flow; consider a larger unit for high-head or heavy industrial needs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the pump's power and typical flow rate?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The pump runs on 25W and typically moves about 400 GPH (≈1500 L\/h), with a maximum around 450 GPH depending on conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the pump run dry or be used outdoors?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Do not run the pump dry; always maintain water level. For outdoor use, plug into a properly rated, grounded outdoor outlet and protect the cord and plug from water exposure.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Knifel","offers":[{"title":"Default Title","offer_id":56832270008660,"sku":"B07TXQS3LH","price":51.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/knifel-pump-front-view_a89d87ed-405d-4d4a-9b14-86b6f63b694d.jpg?v=1787025987","url":"https:\/\/gardenluxe.co.uk\/products\/knifel-submersible-water-pump-25w-400gph-1500l-h-adjustable-flow-quiet-operation-9-8ft-cord","provider":"Gardenluxe Uk","version":"1.0","type":"link"}