Pentair Titan Top Manifold with Air Bleed

The Pentair Titan Top Manifold with Air Bleed (part number 59000400 for legacy Titan series, or cross-compatible with 59023700 for modern Titan RPM and FNS Plus lines) is a primary internal structural and hydraulic fluid-routing distribution component injection-molded from a heavy-walled, high-impact polymer composite. Engineered exclusively to cap the upper core of high-capacity pool and spa Diatomaceous Earth (D.E.) vertical grid filtration networks, this premium component fits seamlessly over a standard cluster of seven full-sized curved D.E. fabric grids and one partial grid.

Its primary operational role is twofold: it serves as a rigid alignment template that holds the upper fingers of the individual grids perfectly vertical to prevent the core from shifting or collapsing under dynamic loads, and it acts as the primary fluid collection hub. During the standard filtration cycle, clean water that has successfully passed through the D.E.-coated grid fabric is forced upward into the integrated perimeter ports of this top manifold. The manifold channels these consolidated fluid streams directly into the central vertical outlet standpipe and out to the pool return loops.

Crucially, the assembly features an integrated internal air bleed screen assembly (such as part number 59023600 or 190092). Positioned at the absolute highest point inside the pressurized tank, this fine mesh bleed line continuously draws in pockets of trapped atmospheric gas or pump-induced air and vents them through the core plumbing before they can collect in the upper dome hull. This automated air scavenging prevents the filter from becoming air-bound, layout-strained, or experiencing destructive "water-hammer" pressure spikes, allowing the internal plumbing grid to safely manage high circulation velocities and sustain continuous system operating metrics up to 50 PSI. Highly resilient against aggressive chemical breakdown, its robust structural resin matrix completely resists material softening, structural warping, and advanced bleaching from continuous contact with pool sanitizers like chlorine, bromine, or routine scale-removing acid flushes. Due to its thick-gauge multi-port structural profile, this replacement top manifold assembly carries a net product and shipping weight of approximately 2.00 to 3.40 pounds (about 32.0 to 54.4 ounces).