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Flexible pipe caps
Qwik Caps
Cap DWV pipe ends, stub-outs and cleanouts. Slide it on, tighten it down, and it holds a water test up to 4.3 psi. Loosen it and it comes back off.
For DWV and other non-pressure lines. Not for water supply.
Made in the USA
0.79″ to 14.30″ pipe O.D.
Water test to 4.3 psi
Reusable
Where it works
One cap for most DWV and sewer pipe
A flexible PVC cap with stainless steel clamps. Qwik Caps close off pipe ends and cleanouts on plastic, cast iron, steel, clay, concrete and corrugated pipe, above or below ground, as a temporary or permanent cap.
4.3 psi
Holds the test
Cap the open ends and run the water test, up to the pressure of a 10-foot water test.
Rough-in
Caps it after
Leave it on stub-outs and rough-ins until the fixture or the next run goes in.
21 sizes
Plus custom
21 stocked sizes for 0.79″ to 14.30″ pipe O.D. For bigger pipe, we make custom caps to fit.
Reusable
Comes back off
Loosen it and pull it off. The same cap goes on the next job.
Qwik Caps are for DWV and other non-pressure lines. Not for pressure systems such as potable water.
Size finder
Find your cap
Choose your pipe and size, or enter its measured outside diameter.
inches
Not sure what you have? Measure across the outside of the pipe end. Clay, concrete and corrugated pipe vary by maker, so measure those.
Your cap shows up here.
| Part | Cap I.D. | Min. pipe O.D. | Max. pipe O.D. | Best cap for |
|---|---|---|---|---|
| QC-0.85 | 0.85″ | 0.80″ | 0.90″ | Specialty size. Match your pipe O.D. |
| QC-1.07 | 1.07″ | 1.00″ | 1.12″ | Specialty size. Match your pipe O.D. |
| QC-1.38 | 1.40″ | 1.20″ | 1.50″ | Specialty size. Match your pipe O.D. |
| QC-1.68 | 1.68″ | 1.37″ | 1.87″ | 1-1/4″ Sch 40 plastic or steel |
| QC-101 | 1.90″ | 1.60″ | 1.95″ | 1-1/2″ Sch 40 plastic or steel, 1-1/2″ no-hub cast iron |
| QC-2.75 | 2.75″ | 2.18″ | 2.93″ | Specialty size. Match your pipe O.D. |
| QC-102 | 2.35″ | 1.94″ | 2.50″ | 2″ Sch 40 plastic or steel, 2″ no-hub cast iron |
| QC-103 | 3.50″ | 3.10″ | 3.63″ | 3″ Sch 40 plastic or steel, 3″ no-hub cast iron |
| QC-3.75 | 3.75″ | 3.30″ | 4.00″ | Specialty size. Match your pipe O.D. |
| QC-104 | 4.50″ | 3.96″ | 4.60″ | 4″ Sch 40 plastic or steel, 4″ no-hub cast iron, 4″ SDR 35 sewer |
| QC-4.75 | 4.80″ | 4.30″ | 5.05″ | Specialty size. Match your pipe O.D. |
| QC-105 | 5.57″ | 5.05″ | 5.85″ | 5″ Sch 40 plastic or steel, 5″ no-hub cast iron |
| QC-106 | 6.30″ | 5.75″ | 6.62″ | 6″ Sch 40 plastic or steel, 6″ no-hub cast iron, 6″ SDR 35 sewer |
| QC-7.00 | 6.96″ | 6.44″ | 7.25″ | Specialty size. Match your pipe O.D. |
| QC-108 | 8.63″ | 7.70″ | 9.10″ | 8″ Sch 40 plastic or steel, 8″ no-hub cast iron, 8″ SDR 35 sewer |
| QC-9.00 | 9.00″ | 8.59″ | 9.35″ | Specialty size. Match your pipe O.D. |
| QC-9.75 | 9.75″ | 9.30″ | 10.00″ | Specialty size. Match your pipe O.D. |
| QC-110 | 10.50″ | 9.88″ | 11.00″ | 10″ no-hub cast iron, 10″ SDR 35 sewer |
| QC-10.75 | 10.74″ | 10.20″ | 11.05″ | 10″ Sch 40 plastic or steel |
| QC-112 | 12.50″ | 11.40″ | 13.35″ | 12″ Sch 40 plastic or steel, 12″ no-hub cast iron, 12″ SDR 35 sewer |
| QC-14.00 | 14.00″ | 13.25″ | 14.30″ | 14″ Sch 40 plastic or steel |
Sizes and ranges from Fernco product data. “Best cap for” uses standard outside diameters: Schedule 40 plastic and steel (IPS), no-hub cast iron (CISPI 301) and PVC sewer SDR 35 (ASTM D3034). Other pipe in a cap’s O.D. range fits too, so measure when in doubt. Part numbers link to dimensional drawings where available.
Why a Qwik Cap
No glue. No threads. Comes back off.
A flexible PVC body, a convex face and stainless steel clamps. That’s the whole cap.
Convex face
A domed face that closes off the pipe end.
Flexible PVC body
Complies with ASTM D5926 and fits most pipe materials within its O.D. range.
Stainless steel clamps
300 series stainless steel, tightened to 60 in-lb.
Specifications
Specification data
| Material | Flexible PVC complying with ASTM D5926 |
| Clamps | 300 series stainless steel |
| Installation torque | 60 in-lb |
| Test pressure | Water test up to 4.3 psi |
| Maximum temperature | 140°F intermittent |
| Sizes | 21 stocked sizes for 0.79″ to 14.30″ pipe O.D. |
| Made in | USA. AIS and BABA compliant. |
| Literature | Catalogs and instructions |
Where to use it
| Systems | DWV and other non-pressure lines |
| Location | Above or below ground |
| Service | Temporary or permanent. Reusable. |
| Pipe | Plastic, cast iron, steel, clay, concrete and corrugated, within each cap’s O.D. range |
Not for pressure systems. Do not use Qwik Caps on pressurized lines such as potable water supply.
Bigger pipe, made to order
Custom Large Diameter Debris Caps
For pipe 6.50″ O.D. and larger, including sizes past the Qwik Cap range. Each cap is fabricated to fit your pipe’s outside diameter.
Pipe O.D. Each cap is made to fit your pipe.
6.50″+
Strong two-piece build. A rigid face, and a flexible body that clamps to the pipe for a soil-tight seal.
2-piece
Take it off and use it again, or leave it on as a permanent cap.
Reusable
- Two-piece construction. A rigid PVC face on a flexible PVC body, with 300 series stainless steel clamps.
- Soil-tight seal. Keeps dirt and debris out of open pipe ends.
- Built for burial. Designed for direct burial on non-pressure horizontal lines.
- Made to your pipe. Every job is different. Tell us the pipe’s O.D. and material, and our team will take it from there.
Non-pressure only. Not for testing. On vertical pipe the cap is not a load-bearing surface. Do not stand or step on it.
Documents
Catalog pages and installation instructions for Qwik Caps and Custom Large Diameter Debris Caps.
Frequently asked questions
Can I test against a Qwik Cap?
Yes, for a water test up to 4.3 psi, the pressure of a 10-foot water test. Custom Large Diameter Debris Caps are not for testing.
Can I use a Qwik Cap on a water supply line?
No. Qwik Caps are for DWV and other non-pressure lines only. Never use them on a pressurized line such as a potable water supply.
Which size do I need?
Use the size finder. Pick Schedule 40, no-hub cast iron or SDR 35 pipe by size, or measure the pipe’s outside diameter and enter it. Each cap fits a range of pipe O.D.s.
Is a Qwik Cap the same as a Jim cap?
Many supply houses call a flexible pipe cap with a clamp a Jim cap. The Fernco Qwik Cap is that kind of cap, made of flexible PVC with stainless steel clamps.
Can I reuse it?
Yes. Loosen it, pull the cap off and use it again. It can also stay on as a permanent cap.
My pipe is bigger than 14.30″ O.D. What do I use?
Fernco makes Custom Large Diameter Debris Caps to your pipe’s outside diameter, for pipe 6.50″ O.D. and larger. They are for non-pressure use and are not for testing.
Got questions?
Whether it’s sizing, an odd pipe or a custom large cap, our team can help. Reach out, or find your Fernco rep.