2" PVC Union: Make Pumps and Filters Easy to Service
By Maintenance Depot Plumbing Team · Last reviewed
Quick answer
A 2" PVC union, like the EZ-FLO #88741, lets you disconnect a pipe run by hand. Install unions on both sides of pumps, filters and valves so they can be removed without cutting pipe.
Anyone who has had to cut out a pump to repair it knows the value of a union. The EZ-FLO 2" PVC union (#88741) lets you separate a pipe run by hand, with no cutting or re-gluing.
Specs at a glance
| Spec | Detail |
|---|---|
| Product | PVC union |
| Size | 2" |
| Brand / model | EZ-FLO #88741 |
| Seal | O-ring |
| Connection | Solvent weld ends, threaded collar |
How a union works
A union has three parts: two ends that are cemented to the pipe, and a threaded collar that pulls them together over a sealing O-ring. Unscrew the collar and the pipe comes apart cleanly.
Where to install unions
- Either side of a water pump, so it can be removed for repair
- Next to filters, softeners and water heaters
- Beside valves that may need replacing
- On pool and tank connections
Installation steps
- Take the union apart and slide the collar onto the pipe first. It's easy to forget!
- Clean and prime the pipe and union ends.
- Cement each end to its pipe and let the joints cure.
- Check the O-ring is seated and clean.
- Bring the ends together and hand-tighten the collar firmly.
Tips
- Don't use thread tape on the union collar; the O-ring does the sealing.
- Keep the O-ring free of sand and grit.
- Hand-tight is usually enough. Over-tightening can crack the collar.
Pair the union with a 2" PVC ball valve to create a service point that's easy to shut off and remove.
Frequently asked questions
Should I use thread tape on a union?
No. The O-ring makes the seal. Tape on the collar threads is not needed.
Why fit unions next to a pump?
So the pump can be removed for repair or replacement without cutting and re-gluing pipe.
What is the most common union mistake?
Forgetting to slide the collar onto the pipe before cementing the ends.