#315-040 PVC Inside Pipe Coupling - 4" - Internal Spigot x Internal Spigot - aka #0302-40

- +
$6.97
  • Unique internal coupling fits snugly inside the ends of 4" PVC pipe, allowing for repairs or extensions where outside couplers won't work.
  • Commonly referred to as an internal coupler or pipe extender—an essential fitting for tight spaces or retrofit applications.
  • Durable PVC construction provides long-lasting performance and resistance to corrosion and chemicals.
  • Ideal for plumbing, drainage, irrigation, and other non-pressurized systems where a flush exterior is desired.
  • Compact and versatile—handy to keep on hand for unexpected repairs or pipe alignment adjustments.

Related Pages

CPVC flutes
How to Make
a CPVC Flute
CPVC elbow
CPVC Fittings
Wet tap saddles for PVC and ABS pipe
Wet Tap Saddles
PVC female hose adapter
PVC By Size
Smart PVC check valve
PVC Check Valves
PVC compression tee
PVC Compression Fittings
pvc compression coupling
PVC Compression Couplings
PVC pipe cutter
PVC Pipe Cutters
PVC expansion coupling
PVC Expansion Couplings
PVC cross fitting
PVC Fittings
Black PVC nipple
PVC Nipples
PVC fitting saver
PVC Fitting Savers
PVC ball valve
PVC Valves
Differences between PVC and CPVC
Differences Between PVC & CPVC
Do you need PVC primer?
The Great PVC
Primer Debate

Copyright© 1995-2025 PlumbingSupply.com.
All Rights Reserved.