{"product_id":"flow-switch-q12ds-3-3-4s-1","title":"Flow Switch, Harwil, 1\/2\" MPT, 3 GPM On 1 Amp, For 3\/4\" Plumbing : Q12DS-3-3-4S-1","description":"\u003csection style=\"width:100%; max-width:960px; margin:0 auto; padding:20px; font-family:Arial, sans-serif; color:#333;\"\u003e \u003ch2 style=\"text-align:center; color:#0064ac; margin-bottom:20px; font-weight:700;\"\u003eProduct Details\u003c\/h2\u003e \u003cp style=\"font-size:1rem; line-height:1.5; margin-bottom:30px;\"\u003e    The Harwil Q-12 Flow Switch is a versatile fluid flow verification device widely used in pool, spa, and fluid control systems since the mid-1980s. It offers adjustable settings to suit various applications, ensuring safe and efficient operation by confirming adequate flow before activating connected equipment.  \u003c\/p\u003e \u003cdiv style=\"border:2px solid #0064ac; padding:15px 20px; border-radius:6px; background:#f0f7fc; margin-bottom:25px; font-weight:600; font-size:1.1rem; color:#004a80;\"\u003e    Flow Switch, Harwil, 1\/2\" MPT, 3 GPM On 1 Amp, For 3\/4\" Plumbing : Q12DS-3-3-4S-1  \u003c\/div\u003e \u003cul style=\"list-style-type:none; padding-left:0; font-size:1rem; line-height:1.6; color:#222;\"\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eModel:\u003c\/strong\u003e Q12DS-3-3-4S-1    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003ePlumbing Connection:\u003c\/strong\u003e 1\/2\" Male Pipe Thread (MPT)    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eFlow Activation:\u003c\/strong\u003e 3 GPM at 1 Amp    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eCompatible Pipe Sizes:\u003c\/strong\u003e 3\/4\" to 6\" diameter pipes    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eFlow Range:\u003c\/strong\u003e 0.7 to 590 GPM    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eMaximum Flow:\u003c\/strong\u003e Up to five times the normal flow rate    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003ePressure Drop:\u003c\/strong\u003e Typically less than 1.0 psig at normal flow    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eElectrical Switching Capability:\u003c\/strong\u003e 5 VDC to 240 VAC, suitable for driving small ice cube relays and some 30A power relays    \u003c\/li\u003e \u003cli style=\"margin-bottom:10px;\"\u003e \u003cstrong\u003eAlternate Part Number:\u003c\/strong\u003e Q-12DS50\/3\/4\/4S\/NO\/1 (Harwil)    \u003c\/li\u003e \u003c\/ul\u003e \u003cp style=\"font-size:1rem; line-height:1.5; margin-top:30px;\"\u003e    The Q-12 Flow Switch is commonly used to verify fluid flow in applications such as swimming pool salt chlorine generators, spas, hot tubs, chillers, and home water disinfection systems, helping to protect equipment and ensure safe operation.  \u003c\/p\u003e\u003c\/section\u003e","brand":"PartsForSpas.com","offers":[{"title":"Default Title","offer_id":47264208650409,"sku":"Q12DS-3-3-4S-1","price":83.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/7584\/4521\/files\/26835.jpg?v=1784059646","url":"https:\/\/partsforspas.com\/products\/flow-switch-q12ds-3-3-4s-1","provider":"PartsForSpas.com","version":"1.0","type":"link"}