![plumbing - Can someone explain to me how this hot water recirculating system works? - Home Improvement Stack Exchange plumbing - Can someone explain to me how this hot water recirculating system works? - Home Improvement Stack Exchange](https://i.stack.imgur.com/d9ic2.jpg)
plumbing - Can someone explain to me how this hot water recirculating system works? - Home Improvement Stack Exchange
![Watts Premier Extremely Quiet Instant Hot Water Recirculating Pump System with Built-In Timer for Tank Water Heaters, 6.2 Inches x 6.0 Inches x 5.0 Inches Device + Equipment - Sump Pumps - Amazon.com Watts Premier Extremely Quiet Instant Hot Water Recirculating Pump System with Built-In Timer for Tank Water Heaters, 6.2 Inches x 6.0 Inches x 5.0 Inches Device + Equipment - Sump Pumps - Amazon.com](https://m.media-amazon.com/images/I/718OMYHzdcL.jpg)
Watts Premier Extremely Quiet Instant Hot Water Recirculating Pump System with Built-In Timer for Tank Water Heaters, 6.2 Inches x 6.0 Inches x 5.0 Inches Device + Equipment - Sump Pumps - Amazon.com
![VEVOR Recirculating Pump, 93W 110V Water Circulator Circulating Pump NPT 3/4" w/Brass Fittings, 3-speed Control Recirculation 9.5 Gpm RS15-6 for Electric Water Heater System - Walmart.com VEVOR Recirculating Pump, 93W 110V Water Circulator Circulating Pump NPT 3/4" w/Brass Fittings, 3-speed Control Recirculation 9.5 Gpm RS15-6 for Electric Water Heater System - Walmart.com](https://i5.walmartimages.com/asr/bc5e033d-7077-4163-92a9-51d0a0743b86.de24f2561db7efb133e8c00ef4cc233d.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
VEVOR Recirculating Pump, 93W 110V Water Circulator Circulating Pump NPT 3/4" w/Brass Fittings, 3-speed Control Recirculation 9.5 Gpm RS15-6 for Electric Water Heater System - Walmart.com
![BOKYWOX Hot Water Circulation Pump NPT 3/4'' Hot Water Recirculating Pump 3-Speed Circulating Pump Stainless Steel 304 Circulation Pump(RS15-6SB) - Amazon.com BOKYWOX Hot Water Circulation Pump NPT 3/4'' Hot Water Recirculating Pump 3-Speed Circulating Pump Stainless Steel 304 Circulation Pump(RS15-6SB) - Amazon.com](https://m.media-amazon.com/images/I/71bNvAORUCL.jpg)
BOKYWOX Hot Water Circulation Pump NPT 3/4'' Hot Water Recirculating Pump 3-Speed Circulating Pump Stainless Steel 304 Circulation Pump(RS15-6SB) - Amazon.com
![EASTMAN NEVERCOLD Universal 3/4-in Brass Water Heater Recirculating Pump System in the Water Heater Accessories department at Lowes.com EASTMAN NEVERCOLD Universal 3/4-in Brass Water Heater Recirculating Pump System in the Water Heater Accessories department at Lowes.com](https://mobileimages.lowes.com/productimages/94d66373-1e43-43de-ac57-0dfc2037f12a/13290262.jpg?size=mpdhi)