The Strangko Blue Alternating Pulsator is superior to all other pulsators. Compare for yourself:
Blue Replacement Coil for 24V Strangko Alternating Pulsator. Letter "H" on schematic diagram.
Pulsator Repair Kit for Strangko or Westfalia new-style pulsators.
A quality product at a reasonable price with a guaranteed not to leak vacuum. Die-cast rust-free metal construction. Sized to fit all sizes of PVC or stainless steel tubing. Fits Strangko Bou-Matic Schlueter and Westfalia electric pulsators.