Menu
DWV testing
Hose Bibb Test Caps
A flexible cap with a brass hose bibb clamps over an open pipe end, so you can run your drain line test and then drain it through a garden hose.
1-1/2″ to 6″
Cast iron or Sch 40 plastic
Brass shutoff
Made in USA
Cap it, test it, drain it
No more pulling a plug into a face full of water. Clamp the cap on a low pipe end, run the test, then hook up a hose and drain the line where you want it.
Cap
Clamps over the outside of a cut pipe end. No test tee or cleanout threads needed.
Test
For DWV tests up to 10 ft of head or 5 psi, with the bibb closed.
Drain
Connect a garden hose, run it to a floor drain or outside, and open the bibb slowly.
Sizes
One cap fits cast iron or Sch 40 plastic pipe of the same nominal size.
How to use it
1
Push it on
Loosen the clamp, but leave it on the cap. Push the cap over the open pipe end.
2
Tighten
Tighten the stainless steel clamp to 60 in-lb.
3
Test
Close the bibb, fill the system and hold the test your inspector requires.
4
Drain
Connect a garden hose, aim it at a drain and open the bibb slowly.
Use it safely
- Low pressure only. For DWV tests up to 10 ft of head or 5 psi.
- Never on pressurized water. Don’t use it on water supply lines, well tanks or water heaters.
- Release pressure first. Drain the line or release the air before you loosen the clamp, and don’t stand in front of a cap under pressure.
- Air testing plastic pipe. Follow your local code and the pipe maker’s rules.
Specifications
| Pipe | Cast iron or Sch 40 plastic, same nominal size |
| Test rating | DWV tests up to 10 ft of head or 5 psi |
| Hose bibb | Brass shutoff valve, 3/4″ garden hose thread |
| Clamp | 300 series stainless steel |
| Install torque | 60 in-lb |
| Temperature | -30°F to 140°F |
| Made in | USA |
Common questions
Can it stay on after the test?
Yes. It can be used as a permanent cap on a pipe end. Check with your inspector if it’s going on a cleanout.
Does one size fit cast iron and plastic?
Yes. Each cap fits cast iron or Sch 40 plastic pipe of the same nominal size.
Can I use it on a water line or tank?
No. It’s for low-pressure drain line testing, up to 10 ft of head or 5 psi. Never use it on pressurized water lines, well tanks or water heaters.
What hose does it take?
A standard garden hose. The brass hose bibb (hose bib) has a 3/4″ garden hose thread.
Got questions?
Not sure which size you need? Our team can help. Reach out, or find your Fernco rep.