Pentair 18" x 1/4" Vertical Grid Tie Rod 44 gpm

The Pentair 18" x 1/4" Vertical Grid Tie Rod (44 GPM) (Part #59019500 / 59019500Z) is a precision-machined structural fastner engineered exclusively for Pentair American Products Warrior and select older FNS/SMBW series vertical-grid Diatomaceous Earth (D.E.) pool and spa filters rated for a 44 gallons per minute (GPM) flow capacity.

Fabricated from high-strength steel, this slim rod measures 18 inches in total length with a 1/4-inch diameter profile. Placed at the dead-center axis of the vertical grid nest, it connects the top plastic distribution manifold directly to the lower support grid plate. When compressed and tensioned with a locking nut, the tie rod forces the individual grid elements into tight, parallel alignment, ensuring that the internal grid assembly remains structurally rigid and completely sealed against hydraulic shifting or internal water bypass during intense pump-filtration cycles.

Because it is a single, slim steel rod, its weight distribution is concentrated yet minimal:

• Actual Product Weight: Approximately 0.25 to 0.30 pounds (roughly 4.0 to 4.8 ounces).

• Packaged Shipping Weight: Typically scales between 0.75 and 1.0 pound due to the elongated, rigid protective cardboard mailing tube or extended rectangular box required to shield the rod from bending during transit.