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Manufacturer Resources
Product Specs
- Buy American Act Compliant:
- No
- Ean:
- 98268299618
- Fitting Name:
- Cap
- Lead Free:
- Yes
- Maximum Working Pressure Bar:
- 17.25
- Maximum Working Pressure Psi:
- 250
- Maximum Working Temperature Celsius:
- 24
- Maximum Working Temperature Fahrenheit:
- 75
- Minimum Temperature Celsius:
- 0.56
- Minimum Temperature Fahrenheit:
- 33
- Part Number:
- 959109
- Series:
- End Cap 3545
- Suitable For Gas Service:
- No
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- General Valve
- Brand Name:
- Watts
- Product Finish:
- Plastic
- Product Material:
- Polysulfone
Watts 3545-10 – Frequently Asked Questions
1) What size tubing does the Watts 3545-10 plastic end cap fit?
The 3545-10 caps 1/2 inch CTS tubing. CTS is copper tube size, which is the sizing convention used for PEX and polybutylene supply tubing, so it matches 1/2 inch CTS tube and not 1/2 inch iron pipe size threads. If your line is IPS threaded, this is the wrong cap.
2) Can I use a Watts 3545-10 end cap on a hot water line?
No. The 3545-10 is rated to a maximum working temperature of 75 F (24 C), so it is a cold water only fitting. Use it to dead-end or terminate cold supply runs. Hot lines need a cap rated for domestic hot water temperatures.
3) Is the Watts 3545-10 cap lead free for potable water?
Yes, the 3545-10 is a lead free fitting. It is molded from polysulfone rather than brass, so there is no leaded alloy in the wetted path.
4) What pressure is the Watts 3545 end cap good for?
250 psi (17.25 bar) maximum working pressure, which covers normal municipal supply pressure with a wide margin. Note the pressure rating pairs with a 75 F temperature ceiling, so treat it as a cold water rating.
5) Will a polysulfone end cap hold up in an unheated crawlspace?
The 3545-10 carries a minimum temperature of 33 F (0.56 C), so it is not intended for service below freezing. In a crawlspace or attic that drops near freezing, insulate or heat trace the line, or the cap is outside its rated range along with the water in it.
6) Does the Watts 3545-10 meet Buy American requirements for a government job?
No. The 3545-10 is not Buy American Act compliant, so it will not satisfy a BAA or domestic-content clause on a federal or federally funded project. Specify a domestically produced cap for those specs.
7) What is the Watts part number for the 1/2 inch CTS plastic end cap?
Order it as Watts 3545-10, in the End Cap 3545 series. Watts also carries it under part number 959109.
How fast can I get the Watts 3545-10 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 3545-10 come with a warranty?
Absolutely. The Watts 3545-10 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 3545-10?
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 3545-10 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.