{"product_id":"biswing-pressure-washer-pump-replacement-7-8-shaft-vertical-plunger-3400-psi-2-5-gpm-front-inlet-outlet","title":"Biswing Pressure Washer Pump Replacement — 7\/8\" Shaft Vertical Plunger, 3400 PSI 2.5 GPM, Front Inlet\/Outlet","description":"\u003cp\u003e\u003cstrong\u003eBiswing's replacement pressure washer pump is a 7\/8\" shaft vertical plunger unit rated to 3400 PSI and 2.5 GPM, designed to swap into compatible gas-powered washers for reliable cold-water cleaning performance.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis pump is built for homeowners and pros who need a direct-fit replacement for worn or failed pressure washer pumps. It uses a 7\/8\" shaft for horizontal engines, accepts a 3\/4\" NH garden hose inlet and an M22 high-pressure hose outlet, and operates up to 3400 PSI at 2.5 gallons per minute. The body is aluminum alloy for strength and heat dissipation, and a built-in thermal relief valve helps protect internal seals during demanding jobs. The package includes the pump, detergent hose, mounting hardware, shaft keys and nuts to simplify installation for many common gas units.\u003c\/p\u003e\n\n\u003ch3\u003eWill this Biswing pump fit my gas pressure washer engine?\u003c\/h3\u003e\n\n\u003cp\u003eCompatibility hinges on shaft size, engine orientation, and hose thread types. This model mounts to engines with a 7\/8\" shaft (horizontal engines) and pairs with standard 3\/4\" NH garden hose inlets and M22 high-pressure outlets, which are common on Simpson, Ryobi and many Honda-based units.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e7\/8\" shaft — fits most 6.5–7 HP (180–225 cc) horizontal engines\u003c\/li\u003e\n  \u003cli\u003eFront inlet\/outlet layout — typical for many gas washers\u003c\/li\u003e\n  \u003cli\u003e3\/4\" NH inlet and M22 outlet — adapter may be needed for nonstandard hoses\u003c\/li\u003e\n  \u003cli\u003eCold-water use only — not for hot-water systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the pump perform on heavy-duty cleaning tasks?\u003c\/h3\u003e\n\n\u003cp\u003eThe Biswing unit delivers up to 3400 PSI and 2.5 GPM, balancing pressure and flow for removing dirt, mildew, oil stains and grime from concrete, decks, siding and vehicles when used correctly. The aluminum alloy body and robust plunger design maintain steady pressure under load while the thermal relief valve reduces the risk of heat damage during continuous operation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMax 3400 PSI for strong spray force\u003c\/li\u003e\n  \u003cli\u003e2.5 GPM for efficient rinsing and coverage\u003c\/li\u003e\n  \u003cli\u003eAluminum alloy construction for durability and heat dispersion\u003c\/li\u003e\n  \u003cli\u003eThermal relief valve helps protect seals under high temperature\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the box and what additional parts might I need?\u003c\/h3\u003e\n\n\u003cp\u003eThe pump ships with the basic hardware to replace most OEM pumps: bolts, locknuts, flat pads, shaft keys and a detergent pickup hose. Depending on your pressure washer’s hose fittings or manifold design you might need a coupler adapter, different hose threads or a new pump-to-engine gasket to complete the swap.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eIncluded: replacement pump, detergent hose, 3 M8 bolts, 3 M8 locknuts, 3 M8 flat pads, 2 shaft keys\u003c\/li\u003e\n  \u003cli\u003eMay need: inlet\/outlet adapters or couplers for nonstandard hoses\u003c\/li\u003e\n  \u003cli\u003eCheck: compatibility with your engine’s shaft length and mounting holes\u003c\/li\u003e\n  \u003cli\u003eNot included: oil (if required for some pump types) or specialized gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow straightforward is installation and maintenance?\u003c\/h3\u003e\n\n\u0026gt; \u003cp\u003eInstallation is intended to be do-it-yourself friendly for those comfortable with basic mechanical tasks: mounting bolts, shaft keying and hose fittings are standard steps. Regular maintenance—keeping inlet filters clean, using cold water only and avoiding dry-run operation—extends pump life and preserves pressure performance.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDIY install: bolt-on design with supplied hardware and shaft keys\u003c\/li\u003e\n  \u003cli\u003eSimple hose connections: 3\/4\" NH inlet and M22 outlet (adapters available)\u003c\/li\u003e\n  \u003cli\u003eMaintenance tips: keep inlet filter clean and avoid running dry\u003c\/li\u003e\n  \u003cli\u003eUse cold water only; inspect seals and connections periodically\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The Biswing 3400 PSI, 2.5 GPM 7\/8\" shaft pump suits homeowners, rental operators and light commercial users who need a cost-effective replacement for common gas-powered pressure washers. Choose this pump if your machine uses a horizontal 7\/8\" shaft, you require up to 3400 PSI for tough cleaning, and you want an aluminum-bodied unit with standard garden and high-pressure hose connections. If your washer is a hot-water model or uses a different shaft size, look for a pump matched to those specifications instead.\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: Does this pump fit hot-water pressure washers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No — this Biswing pump is designed for cold-water use only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What shaft size and engine horsepower does it require?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It fits a 7\/8\" shaft and is commonly paired with 6.5–7 HP (180–225 cc) horizontal engines.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Biswing","offers":[{"title":"Default Title","offer_id":56842638328148,"sku":"B0GHVCWC59","price":122.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/biswing-front-view-pump-assembled.jpg?v=1787076985","url":"https:\/\/gardenluxe.co.uk\/products\/biswing-pressure-washer-pump-replacement-7-8-shaft-vertical-plunger-3400-psi-2-5-gpm-front-inlet-outlet","provider":"Gardenluxe Uk","version":"1.0","type":"link"}