Sta-Rite Posi-Flo Filter Top Clamp, WC19-64

The Sta-Rite WC19-64 is the top clamp for filter models T-50TX, T-70TX, T-100TX, T-50TXR, T-70TXR and T-100TXR.

What the clamp does

The filter tank is built in two halves that meet at a seam sealed by an o-ring. The clamp is the band that pulls them together and holds that seal against system pressure. It is a structural part, so a clamp that has cracked, stretched or corroded through is not something to keep tightening.

Chasing a seam leak

When water weeps from the seam, most people replace the tank o-ring, which is right most of the time. If the leak comes straight back, look at the clamp itself. A band that has lost its shape, a bolt that has rusted and will no longer draw evenly, or a lug that has started to split will all leave one section of the seam under less pressure than the rest, and the o-ring cannot make that up.

Fitting

Always release system pressure and open the air relief before touching the clamp on a running filter. Draw the new clamp down evenly, and check that the tank halves are seated squarely before applying full torque.