{"product_id":"viair-90113-pressure-switch-with-relay-1-8-in-npt-reliable-12v","title":"Viair 90113 Pressure Switch with Relay 1\/8 in. NPT - Reliable 12V","description":"\u003cp\u003eIn this review the Viair 90113 Pressure Switch with Relay is evaluated as a compact, utilitarian solution for automotive and mobile air systems that need an automatic on\/off control at specific pressures. The single biggest reason to buy is its dependable switching behavior: it turns on at 90 PSI and off at 120 PSI, which makes it well suited for users who need a simple, rugged control device for 12-volt compressors. The unit is clearly aimed at installers who value a sealed, long-life component with pre-fitted terminals for fast hookup.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating pressures:\u003c\/strong\u003e The 90 PSI on \/ 120 PSI off set points provide a clear pressure window for automatic compressor control without constant monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-volt compatibility:\u003c\/strong\u003e Rated for 40 amps on 12-volt systems so it can handle typical automotive air compressors when wired correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable cycle life:\u003c\/strong\u003e Tested to last over 10,000 cycles which gives confidence for repeated use in mobile setups and frequent-duty applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-fitted terminals:\u003c\/strong\u003e Leads come with insulated male push-to-connect terminals that are clearly marked, speeding up installation and reducing wiring mistakes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture resistance:\u003c\/strong\u003e The sealed construction helps protect the switch and relay from moisture for reliable field use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint:\u003c\/strong\u003e At roughly 4.25 in long and 2.25 in wide and high, the unit packs the relay and switch into a small housing for tight mounting locations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis pressure switch is best for DIYers, off-road enthusiasts, and tradespeople who run small to medium 12-volt air compressors in trucks, trailers, or mobile rigs and need an automatic cutoff at a specific pressure range. Its pre-fitted terminals and simple pressure set points appeal to anyone wanting a quick, reliable replacement or upgrade for an existing system.\u003c\/p\u003e\n\u003cp\u003eThose who need variable or custom pressure ranges, multi-voltage compatibility, or continuous higher-amp switching should look elsewhere, as this model is fixed to a 90\/120 PSI trip and is intended for 12-volt circuits up to 40 amps.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClear and useful pressure set points that suit many automotive air setups.\u003c\/li\u003e\n\u003cli\u003eRobust construction and sealed body improve longevity in damp or dirty environments.\u003c\/li\u003e\n\u003cli\u003ePre-marked, insulated push-to-connect leads make installation fast and less error-prone.\u003c\/li\u003e\n\u003cli\u003eCompact size fits in tight mounting spaces common on vehicles and trailers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report seasonal lifespan concerns, so long-term durability can vary by application intensity.\u003c\/li\u003e\n\u003cli\u003eFixed pressure tolerance of 5% means it is not adjustable for precise calibration needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating pressure\u003c\/td\u003e\n\u003ctd\u003e90 PSI on \/ 120 PSI off\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread size\u003c\/td\u003e\n\u003ctd\u003e1\/8 in. Male NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmp rating\u003c\/td\u003e\n\u003ctd\u003e40 amps (12-volt systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle life\u003c\/td\u003e\n\u003ctd\u003eTested over 10,000 cycles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSealing\u003c\/td\u003e\n\u003ctd\u003eSealed for moisture resistance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e4.25 in L x 2.25 in W x 2.25 in H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTolerance\u003c\/td\u003e\n\u003ctd\u003e5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Viair 90113 Pressure Switch with Relay is a practical, cost-effective choice for anyone needing a straightforward automatic control for 12-volt air compressors. It offers durable construction, easy installation, and clearly defined pressure switching that make it a good value for replacement parts and mobile setups, provided the 90\/120 PSI range and 40 amp limit match the intended application.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this be used on 24-volt systems?\u003c\/strong\u003e\u003cbr\u003eNo. This unit is specified for 12-volt systems only and is rated for 40 amps at that voltage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the wires connected?\u003c\/strong\u003e\u003cbr\u003eThe leads are pre-fitted with insulated male push-to-connect terminals that are clearly marked to simplify correct wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the switch weather resistant?\u003c\/strong\u003e\u003cbr\u003eYes. The housing is sealed for moisture resistance, which helps in damp or outdoor installations.\u003c\/p\u003e","brand":"VIAIR","offers":[{"title":"Default Title","offer_id":48655504605403,"sku":"B000FQ7WKK","price":36.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81ytVfoXmhL._AC_SL1500_3803eee9-1a46-42b3-ac41-743105789a67.jpg?v=1778548332","url":"https:\/\/gearmusthave.com\/products\/viair-90113-pressure-switch-with-relay-1-8-in-npt-reliable-12v","provider":"GearMustHave","version":"1.0","type":"link"}