{"product_id":"1-mpt-19gpm-flow-switch-q8dsa","title":"1\" MPT 19GPM Flow Switch Q8DSA","description":"\u003cp\u003eProfessional-grade Harwil 1\" MPT flow switch engineered to protect your spa's heating system by monitoring water circulation. This critical sensor activates at 19 GPM flow rate and handles up to 15 amps, making it compatible with most residential and commercial spa installations requiring reliable flow detection and heater protection.\u003c\/p\u003e\u003cp\u003eBuilt to OEM specifications, this flow switch prevents costly damage from dry-fire conditions while ensuring consistent spa operation. At Bubbles Supply, we guarantee exact fit compatibility and back every sensor with our comprehensive 1-year warranty, plus same-day shipping to keep your spa running without delay. Installation requires basic plumbing knowledge—ensure proper flow direction and secure all threaded connections to manufacturer torque specifications for optimal performance and leak prevention.\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\/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=\"\/product\/12-mpt-flow-switch-q12ds-3-3-4s-1\"\u003e1\/2\" MPT Flow Switch Q12DS-3-3-4S-1\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":50249025847653,"sku":"Q8DSA","price":257.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/2162\/2373\/files\/1-mpt-19gpm-flow-switch-q8dsa-q8dsa-1.jpg?v=1779741371","url":"https:\/\/checkout.bubblessupply.com\/products\/1-mpt-19gpm-flow-switch-q8dsa","provider":"Bubbles Supply","version":"1.0","type":"link"}