{"product_id":"threlaco-vrt3-310-pressure-washer-unloader-valve-3-8-f-outlet-4500-psi-10-5-gpm-brass","title":"Threlaco VRT3-310 Pressure Washer Unloader Valve, 3\/8\" F Outlet — 4500 PSI, 10.5 GPM, Brass","description":"\u003cp\u003e\u003cb\u003eThrelaco VRT3-310 is a heavy-duty pressure washer unloader valve that protects pumps by diverting flow and controlling pressure up to 4500 PSI with a 10.5 GPM (40 L\/min) capacity.\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe VRT3-310 unloader valve is a single-pack replacement designed for hot- and cold-water pressure washers. Built from corrosion-resistant brass and rated to operate at temperatures up to 195 °F (90 °C), this valve combines robust materials with industrial-level flow and pressure specs. It fits common pump families and provides a secure inlet\/outlet\/bypass configuration so your cleaning system runs smoothly under variable loads.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this valve protect my pressure washer pump?\u003c\/h3\u003e\n\u003cp\u003eThe unloader valve relieves excess pressure by redirecting water flow back to the pump or bypass line whenever the trigger gun is closed or when pressure spikes occur. This prevents overloading the pump and reduces wear on seals and valves, extending the service life of the system. Proper installation and correct pressure adjustment are important to get reliable protection.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLimits maximum allowable pressure to safe operating levels (up to 4500 PSI).\u003c\/li\u003e\n  \u003cli\u003eDiverts surplus flow through the bypass to avoid stall conditions.\u003c\/li\u003e\n  \u003cli\u003eBrass construction resists corrosion and thermal stress for longer service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this unloader work with my existing pump or system?\u003c\/h3\u003e\n\u003cp\u003eThe VRT3-310 is made for compatibility with many common pump brands and models, including AR, Comet, Cat Pump and specific Cat 7630 and 8 GPM Comet variants. Its 3\/8\" F inlet\/outlet\/bypass fittings match many commercial and industrial plumbing setups. Always verify thread types and pump model compatibility before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/8\" female inlet\/outlet\/bypass sizing for common hose and fitting setups.\u003c\/li\u003e\n  \u003cli\u003eCompatible with AR, Comet, Cat Pump families and similar designs.\u003c\/li\u003e\n  \u003cli\u003eSuitable for pumps used in both hot and cold water cleaning applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the performance limits and material benefits?\u003c\/h3\u003e\n\u003cp\u003eThis unloader supports flows up to 10.5 US GPM (40 L\/min) and pressures up to 4500 PSI, with rated temperatures up to 195 °F (90 °C). The valve’s brass body improves corrosion resistance compared with lower-grade metals and helps maintain reliable sealing under repeated thermal cycling. Those specs make it a fit for demanding cleaning tasks where durability matters.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaximum flow: 10.5 GPM (40 L\/min) for high-volume applications.\u003c\/li\u003e\n  \u003cli\u003eMaximum pressure: 4500 PSI for heavy-duty cleaning power.\u003c\/li\u003e\n  \u003cli\u003eTemperature rating: up to 195 °F (90 °C) for hot-water compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and set up the unloader valve?\u003c\/h3\u003e\n\u003cp\u003eInstallation should be handled by a qualified technician or an experienced DIYer comfortable with pressure-system plumbing and safe pump shutdown procedures. Proper torque, correct thread sealing, and pressure adjustment are crucial to avoid leaks, pump damage, or unsafe conditions. The seller recommends professional installation to ensure correct calibration and safe operation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse correct thread sealing and torque per pump manufacturer guidance.\u003c\/li\u003e\n  \u003cli\u003eAdjust pressure gradually while monitoring system gauges for safe set points.\u003c\/li\u003e\n  \u003cli\u003eTest for leaks and confirm bypass operation before regular use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The Threlaco VRT3-310 unloader valve is aimed at technicians and facility managers who maintain commercial or industrial pressure washers, as well as serious homeowners using heavy-duty cleaning equipment. If you need a rugged replacement part with high pressure and flow ratings, corrosion-resistant brass construction, and broad compatibility with AR, Comet, and Cat Pump systems, this valve offers a direct-fit, performance-oriented option. Choose professional installation if you’re unsure about plumbing or pressure settings to keep pumps functioning reliably.\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 flow and pressure does the VRT3-310 support?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It supports up to 10.5 US GPM (40 L\/min) and a maximum allowable pressure of 4500 PSI.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install the unloader myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Professional installation is recommended; if DIY, follow pump manufacturer torque and pressure-adjustment procedures carefully.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Threlaco","offers":[{"title":"Default Title","offer_id":56837872615764,"sku":"B0FW55X22M","price":83.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/threlaco-vrt3-310-front-view.jpg?v=1787061404","url":"https:\/\/gardenluxe.co.uk\/products\/threlaco-vrt3-310-pressure-washer-unloader-valve-3-8-f-outlet-4500-psi-10-5-gpm-brass","provider":"Gardenluxe Uk","version":"1.0","type":"link"}