{"product_id":"fleck-piston-seal-spacer-kit-5810-fltr","title":"Fleck Piston Seal \u0026 Spacer Kit 5810 Fltr","description":"\u003cp\u003eThe Pentair Fleck Piston, Seal \u0026amp; Spacer Kit for the 5810 Filter valve is a complete rebuild set that refreshes the moving and sealing components inside the control head. This is the genuine kit that returns a 5810 filter valve to factory performance, restoring clean cycling through service, backwash, and rinse. It is listed under the Fleck Piston \u0026amp; Seal Kits service family and is configured specifically for the 5810 filter application.\u003c\/p\u003e\u003ch3\u003eWhat Wears Out and Why\u003c\/h3\u003e\u003cp\u003eThe piston travels back and forth through a stack of seals separated by spacers in order to open and close the valve's internal ports at each stage of the cycle. The seals form the watertight barriers between ports, while the spacers hold them at precise intervals so the piston lands in exactly the right position every time. Over years of service the seals lose their resilience and the piston surface develops wear, allowing water to bypass internally rather than following the intended flow path. That bypass reduces backwash effectiveness, shortens the cleaning of the media bed, and degrades overall filtration, often without any obvious external leak. A full piston-and-seal rebuild eliminates the bypass and restores the valve to like-new operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine Fleck 5810 Filter piston, seal \u0026amp; spacer kit\u003c\/li\u003e\n\u003cli\u003eComplete service set for the 5810 filter control valve\u003c\/li\u003e\n\u003cli\u003eRestores positive internal sealing and clean cycling\u003c\/li\u003e\n\u003cli\u003eEliminates internal bypass from worn seals\u003c\/li\u003e\n\u003cli\u003eListed under Fleck Piston \u0026amp; Seal Kits\u003c\/li\u003e\n\u003cli\u003eFar more economical than valve replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRebuilding the piston stack is significantly cheaper than replacing an entire control valve and is a routine part of long-term filter maintenance. Service technicians keep these kits on hand for scheduled overhauls, often replacing the piston, seals, and spacers together since they wear as a system. To perform the service, take the unit out of service, depressurize it fully, and follow Pentair's documented procedure for the 5810. Lubricate the new seals with an approved silicone lubricant during reassembly, confirm the piston slides freely through the stack, and reinstall carefully so every port seals as designed. Done properly, this rebuild keeps the 5810 filtering reliably for years. Because a complete kit addresses every wear point in the piston stack at once, it spares you from chasing individual seals and ensures the valve comes back together to a single, consistent standard for years of dependable filtration.\u003c\/p\u003e","brand":"Pentair","offers":[{"title":"Default Title","offer_id":45668812062773,"sku":"FL61956-03","price":169.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/4950\/2261\/files\/fl61956-03.jpg?v=1782534201","url":"https:\/\/watersoftenerplus.com\/hi-as\/products\/fleck-piston-seal-spacer-kit-5810-fltr","provider":"Water Softener Plus","version":"1.0","type":"link"}