Upper Seal Spacer Kit for Fleck 3900 Valve. Lower Seal Spacer Kit for Fleck 2″, 2930, 3130, 3150 Valves. This Part can be located on page 6, of the Fleck 3900 Service Manual.

3900 Valve Lower Seal Spacer Kit Includes: 4 – Seals #16068 2 – Narrow Spacers #16069 1 – Wide Spacer #16070. (The 3900 Top Seal KIt is Fleck part #60131) This Part can be located on page 6, of the Fleck 3900 Service Manual.

This Piston allows hard water to flow past the valve during regeneration. This Part can be located on page 6, of the Fleck 3900 Service Manual.

This NHWBP (No Hard Water Bypass) Piston Does Not allow water to flow past the valve, during regeneration.