Pentair
Pentair WC78-84P Male Parflex Compression Elbow
Pentair WC78-84P Male Parflex Compression Elbow
Pentair WC78-84P Male Parflex Compression Elbow
The Pentair WC78-84P Male Parflex Compression Elbow is an OEM replacement fitting used within select Pentair and Sta-Rite System 3 high-rate sand filter assemblies. This 90-degree elbow connects the filter’s internal Parflex tubing to the designated filter component, helping maintain the proper routing of the internal air-bleed system.
Pentair identifies the WC78-84P as the male Parflex elbow used on System 3 SS Series S7S50 and S8S70 sand filters. It is a direct replacement for a damaged, cracked, leaking, or missing original elbow with the same part number.
Confirm that your existing part is marked WC78-84P and verify your filter model before ordering. Pool filter parts can look similar while using different threads, tubing sizes, or connection styles.
Product Features
- Genuine Pentair replacement part
- Manufacturer part number: WC78-84P
- Male Parflex-style 90-degree elbow fitting
- Used in the filter’s internal tubing and air-bleed assembly
- Designed to replace the original factory-installed elbow
- Sold individually
Compatible Filter Models
| Brand | Filter Series | Models |
|---|---|---|
| Pentair / Sta-Rite | System 3 SS Series Sand Filters | S7S50 and S8S70 |
When Should This Elbow Be Replaced?
Replace the WC78-84P when the original elbow is cracked, stripped, leaking, brittle, or no longer holds the attached Parflex tubing securely. A damaged internal fitting can interrupt the filter’s air-bleed path and may allow air to remain trapped inside the filter tank.
Always shut off the circulation pump, disconnect power, and completely relieve filter pressure before opening or servicing the filter.
Match the part number on your original fitting and check the model number printed on your filter label. Aqua Terra Backyard can help verify compatibility before installation.
