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Manufacturer Resources
Product Specs
- Connection Size:
- 1/2 IN
- Connection Size Metric:
- Does Not Apply To Product
- Connection Type:
- Push to connect
- Fitting Name:
- Cap
- Maximum Working Pressure:
- 250
- Maximum Working Pressure Bar:
- 17.25
- Maximum Working Temperature:
- 24.0°C
- Maximum Working Temperature Celsius:
- 24
- Maximum Working Temperature Fahrenheit:
- 75
- Minimum Temperature:
- 33°F
- Minimum Temperature Celsius:
- 0.56
- Minimum Temperature Fahrenheit:
- 33
- Series:
- End Cap 3545
- Suitable For Gas Service:
- No
- Thread Type:
- Does Not Apply To Product
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- General Valve
- Product Finish:
- Plastic
- Product Material:
- Polysulfone
- UL Listing (Specs):
- N-No UL Code Rating
Watts 959109 – Frequently Asked Questions
1) Will the Watts 0959109 end cap work on 1/2 inch PEX, copper, and CPVC?
The 0959109 is a 1/2 inch CTS push-to-connect cap. CTS (copper tube size) push-fit caps seat on tubing cut to the same 1/2 inch CTS outside diameter, which covers PEX, copper and CPVC at that size. It is a push-to-connect joint, not threaded, so there is no thread type to match.
2) Can I use the Watts 959109 plastic cap on a hot water line?
No. The cap is rated to a maximum working temperature of 75 F (24 C), so it is a cold-water or ambient-temperature part only. Domestic hot water runs well above that. Its low limit is 33 F, so keep it out of lines that can freeze as well.
3) Is a push-fit cap rated high enough to cap a line for a pressure test?
The Watts 0959109 cap carries a 250 psi (17.25 bar) maximum working pressure, which is above typical domestic supply pressure. Keep the test water at or below the 75 F temperature ceiling, since that is the limiting factor on this plastic cap rather than pressure.
4) What is the Watts 0959109 made of, and will it hold up inside a wall or behind a fixture?
Polysulfone, a rigid plastic. That makes it a non-metallic cap for cold potable water within its 33 F to 75 F range. For a stub-out you expect to reopen later, the push-to-connect joint means no soldering or glue at the cap.
How fast can I get the Watts 959109 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Watts 959109 come with a warranty?
Absolutely. The Watts 959109 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Watts 959109?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Watts 959109 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.