{"product_id":"impeller-locking-screw","title":"Pentair Impeller Locking Screw","description":"\u003cp\u003eThe Pentair 355389 is the impeller locking screw for Pentair Challenger and SuperFlo pool pumps. It is left hand threaded, and it is the genuine Pentair part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eLeft hand thread\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe screw is deliberately reverse threaded, so the impeller cannot unscrew itself as the motor spins. That also means it loosens clockwise. More than one of these has been rounded off by someone leaning hard on it the wrong way, so get the direction right before you put weight on the tool.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat it does\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe screw locks the impeller onto the motor shaft. If it strips, backs out or is left out after a rebuild, the impeller can shift on the shaft, and the pump loses flow and starts making noise long before anyone thinks to look at a single small screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen to replace it\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eAny time the impeller comes off, for a mechanical seal or for a rebuild, look at the screw before it goes back in. A screw with a damaged head or worn threads is not worth reusing.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":48625843732692,"sku":"PAC-101-3141","price":9.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/9568\/2516\/files\/default_82faede5-504d-4b14-9a9b-9967ed979405.png?v=1788701425","url":"https:\/\/www.activepoolsupply.com\/products\/impeller-locking-screw","provider":"Active Pool Supply","version":"1.0","type":"link"}