Mechanical Seal 3868 — Type 166 / T-16 (3/4″) | PS-3868
Equal to industry standard 3868 / PS-3868.
Direct-fit Type 166 / T-16 single spring seal for pool/spa and small pump applications- upgraded with Viton (FKM) elastomers and a machined carbon/ceramic face set for longer service life.
At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Machined carbon/ceramic faces • Viton elastomers
Fits: Hayward Super Pump®, Super Pump II, Super Pump VS and the original Max-Flo (SPX1600Z2), Pentair IntelliFloXF® and SuperFlo® VST (17351-0101S), Sta-Rite Dura-Glas® II, Max-E-Glas™ II, Max-E-Pro® and Dyna-Pro®, plus Pac-Fab, American Products, Purex, Swimquip and Jacuzzi pool and spa pumps. The standard Pentair IntelliFlo takes the PS-1000; Pentair SuperFlo / SuperFlo VS and Hayward Max-Flo II take the PS-200.
Same seal, same size, same fit — what changes is the material and how it’s built. All five seals below are the PS-201 for a 3/4″ shaft, and all five fit the same pumps. They differ in two ways. The build: a molded carbon face or a premium carbon face machined from solid stock. The materials: a ceramic or silicon carbide seat, and Nitrile or Viton rubber. Pick the one that suits your water.
| Seal | Material | Best For This Water |
|---|---|---|
| 201c | Molded carbon face, ceramic seat, Nitrile rubber | Normal chlorine, normal temperature, clear water. The standard build for a home pool or spa. |
| 201cv | Molded carbon face, ceramic seat, Viton rubber | Saltwater or higher chlorine, and warmer water. Viton holds up where standard Nitrile hardens and cracks. |
| 851 | Machined premium carbon face, ceramic seat, Nitrile rubber | Saltwater pools with a chlorine generator, commercial pools, or any pump that runs most of the day. |
| 3868 | Machined premium carbon face, ceramic seat, Viton rubber | High chlorine and hot water — heated spas, therapy pools, heavy commercial duty. |
| 201cvss | Silicon carbide face and seat, Viton rubber | Sandy, dusty or gritty water, or any pump where seals keep failing early. The hardest faces we offer. |
Rebuilding a Hayward Super Pump or Super II?Get this 3868 seal in a complete kit with both gaskets — choose Premium – Machined Carbon/Ceramic/Viton (3868) from the kit drop-down.
- Hayward Super Pump seal kit — seal, SPX1600T and SPX1600R
- Hayward Super II seal kit — seal, SPX3000T and SPX1600R
- Hayward SPX1600T housing gasket — Super Pump
- Hayward SPX3000T housing gasket (G-345) — Super II
- Hayward SPX1600R diffuser gasket — Super Pump & Super II
Doing the job yourself? Read How to Replace a Mechanical Pump Seal.