{"product_id":"16-23-gpm-flow-switch-q12dsmsc","title":"16-23 GPM Flow Switch Q12DSMSC","description":"\u003cp\u003eThe Harwil Q12DSMSC flow switch monitors water flow in residential and commercial spa systems, triggering safety shutdowns when flow drops below 16 GPM. This 1\/2\" NPT threaded sensor handles up to 23 GPM maximum flow and switches 2 amp loads, making it ideal for protecting heaters and pumps from dry-fire damage. The robust design prevents costly equipment failures by ensuring adequate water circulation before allowing heating elements to activate.\u003c\/p\u003e\u003cp\u003eAt Bubbles Supply, every Q12DSMSC flow switch comes with our exact fit guarantee and ships same-day when ordered by 2 PM EST. Our 1-year warranty backs this genuine Harwil sensor, giving you confidence in long-term reliability. Professional installation recommended – verify your system's flow requirements and ensure proper threading engagement to maintain accurate flow sensing and prevent leaks.\u003c\/p\u003e\n\u003c!-- p11:start --\u003e\u003cdiv class=\"related-links\"\u003e\n\u003ch2\u003eRelated parts \u0026amp; guides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/product\/1-mpt-19gpm-flow-switch-q8dsa\"\u003e1\" MPT 19GPM Flow Switch Q8DSA\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/product\/12-mpt-flow-switch-q-12ds-c2-beach\"\u003e1\/2\" MPT Flow Switch Q-12DS-C2-BEACH\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/product\/12-mpt-flow-switch-q12ds\"\u003e1\/2\" MPT Flow Switch Q12DS\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collection\/sensors-1\"\u003eSee all Sensors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/knowledge\/how-to-test-a-spa-flow-switch\"\u003eHow to test a spa flow switch\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003c!-- p11:end --\u003e","brand":"Harwil","offers":[{"title":"Default Title","offer_id":50249038791013,"sku":"Q12DSMSC","price":192.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/2162\/2373\/files\/16-23-gpm-flow-switch-q12dsmsc-q12dsmsc-1_3a127d23-2fa6-41f7-af6c-ff8fae231338.jpg?v=1779742216","url":"https:\/\/checkout.bubblessupply.com\/products\/16-23-gpm-flow-switch-q12dsmsc","provider":"Bubbles Supply","version":"1.0","type":"link"}