
Quick overview
- Buna-N, 70 shore Standard nitrile union o-ring in a 70 durometer.
- Two union sizes Listed for both 1-1/2 inch and 2 inch unions.
- System:3 filters Used on the Sta-Rite System:3 Modular Media SM cartridge filter and the System:3 SD series DE filter.
- IntelliPro pumps Also listed as the union o-ring on the IntelliPro pump.
- FullFloXF backwash valve Carried as the union o-ring for the Pentair FullFloXF backwash valve.
- Cheap insurance A union that drips or sucks air is nearly always a tired o-ring, and it is worth changing whenever a union is opened.
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Product details
The Sta-Rite U9-362 is a Buna-N union o-ring in a 70 shore durometer, listed for both 1-1/2 inch and 2 inch unions.
Where it is used
The same o-ring turns up across a wide range of equipment: the Sta-Rite System:3 Modular Media SM series cartridge filter, the System:3 SD series DE filter, the IntelliPro pump, and the Pentair FullFloXF backwash valve. Anywhere a union collar screws down on this size of connection, this is the seal that does the work.
Why it matters
On the discharge side a tired union o-ring drips. On the suction side it does something worse: it lets air in, so the pump loses prime and the basket fills with air instead of water. Either symptom at a union points at the o-ring first.
Fitting it
Wipe the groove clean, lubricate the new o-ring, and tighten the union collar by hand. Union collars are not meant to be pulled up with a wrench, and overtightening cracks the collar without improving the seal.
| Brand | Sta-Rite |
|---|---|
| Manufacturer part number | U9-362 |
| UPC | 788379850951 |
| Part Type | Filter Valves Part |
| Type | Union o-ring |
| Material | Buna-N |
| Durometer | 70 shore |
| Union size | 1-1/2 inch and 2 inch |
| Fits | Sta-Rite System:3 Modular Media SM series cartridge filter, Sta-Rite System:3 SD series DE filter, IntelliPro pump, Pentair FullFloXF backwash valve |
| Shipping weight | 0.02 lb |
| Ships | Parcel |
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