{"product_id":"pentair-33-2048-and-4048-center-rod","title":"Pentair 33\" 2048 and 4048 Center Rod","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"markdown markdown-main-panel enable-luminous-fast-follows enable-updated-hr-color stronger tutor-markdown-rendering\" id=\"model-response-message-contentr_5d6bdfc78cbc8619\" aria-busy=\"false\" aria-live=\"polite\" dir=\"ltr\"\u003e\n\u003cp data-path-to-node=\"0\" id=\"p-rc_424136a6edbcbbdc-82\"\u003eThe Pentair 33\" Center Tie Rod (part number 072880 or 072868) is a critical internal structural hardware fastener machined from high-tensile stainless steel, engineered exclusively for legacy Purex, Pac-Fab, and Pentair 2000 and 4000 series side-mount Diatomaceous Earth (D.E.) pool and spa filtration systems. This individual central rod measures exactly 33.5 inches in total length and is tailored specifically for 48-square-foot capacity tank configurations, including the SM2048, SMBW2048, SM4048, and SMBW4048 filter vessels. Featuring standard 1\/4\"-20 threads on both ends—with a short 9\/16-inch threaded top apex and an elongated 1-1\/2 inches of threading on the bottom—the rod incorporates a factory-staked stationary compression washer positioned exactly 6-3\/4 inches down from the top. Its primary operational role is to serve as the high-tension vertical spine that clamps the filter's complete internal grid core together; when brass nuts are torqued down onto its opposing tips, the rod generates massive axial compression that locks the top manifold and bottom collection hub tightly over the vertical grid elements. This rigid structural clamping prevents the grids from tilting, warping, or shifting under turbulent back-pressures, establishing a flawless hydraulic boundary that forces all circulating water through the D.E. media bed and safely sustains continuous system operating pressures up to 50 PSI without media bypass. Built to remain permanently submerged at the absolute center of the pressurized vessel, its commercial-grade stainless steel construction completely resists advanced oxidation, rusting, material stretching, and corrosive degradation from continuous exposure to high-strength pool sanitizers like chlorine or concentrated scale-removing acid flushes. Due to its slender, solid metal rod geometry, this replacement center tie rod carries a net product and shipping weight of approximately \u003cb data-path-to-node=\"0\" data-index-in-node=\"1932\"\u003e0.35 to 0.50 pounds\u003c\/b\u003e (about 5.6 to 8.0 ounces).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e","brand":"Commercial Pool and Spa Supplies","offers":[{"title":"Default Title","offer_id":53416243429487,"sku":"72880","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3785\/3807\/files\/images__69435.jpg?v=1782747622","url":"https:\/\/commercialpoolandspasupplies.com\/products\/pentair-33-2048-and-4048-center-rod","provider":"Commercial Pool and Spa Supplies ","version":"1.0","type":"link"}