Pentair XF Series Pump Union Kit Without Tap, 2-1/2″ (Fits 2-1/2″ & 3″ Plumbing) | 410020
The Pentair 410020 is a genuine XF Series union kit without a tap used to connect compatible Pentair XF pool pumps to your plumbing with a secure, service-friendly union connection. This kit is designed to work with both 2-1/2″ and 3″ PVC plumbing and is commonly used on Pentair WhisperFlo XF and IntelliFlo XF style pumps (model/revision dependent).
Key Features
- 2-1/2″ union kit (no tap): union adapters are supplied without a threaded port/tap.
- Works with 2-1/2″ and 3″ plumbing: glues inside 2-1/2″ pipe or glues over the outside of 3″ pipe (installation dependent).
- Service-friendly: unions allow pump removal/maintenance without cutting plumbing.
- Leak-resistant seals: includes new seals designed for proper union sealing when assembled correctly.
Compatibility
- Pentair WhisperFlo® XF pool pumps
- Pentair IntelliFlo® XF variable speed pumps (commonly referenced for later revisions)
- Pentair IntelliPro® XF variable speed pumps
- Tip: Pump unions can vary by model year/revision. Confirm your pump series is XF and that your parts diagram calls for 410020.
What’s Included
- (2) Union nuts
- (2) Union adapters (without tap)
- (2) Clip locking rings
- (2) Diamond seals
Common Reasons to Replace
- Cracked or stripped union nuts/couplers
- Persistent drips at the pump union connection due to worn sealing surfaces
- Pump replacement or pad replumb where new unions are needed for a clean install
- Upgrading to 3″ plumbing while keeping an XF pump connection serviceable
Installation Notes
- Dry-fit everything first to confirm alignment and pipe engagement depth.
- Use pool-rated PVC primer/cement on the slip connections and allow full cure before running the pump.
- Hand-tighten union nuts evenly; do not over-tighten plastic unions.
- Keep sealing surfaces clean and free of debris; a small piece of grit can cause a slow leak.
Related Products
- Pentair WhisperFlo XF parts
- Pentair IntelliFlo XF parts
- Pentair IntelliPro XF parts
- 3″ PVC fittings
- 2-1/2″ PVC fittings
- Pool plumbing primer & cement
- Silicone lubricant (O-ring safe)
Maintenance Tips
- Inspect unions seasonally for hairline cracks and re-tighten gently if you notice seepage.
- When opening unions for service, wipe sealing surfaces clean before reassembly to help prevent leaks.
- Support plumbing near the pump to reduce vibration stress on the union connection.
