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Manufacturer Resources
Product Specs
- Buy American Act Compliant:
- No
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- General Valve
Watts NH-BL-4-FA – Frequently Asked Questions
1) What size pipe does the Watts NH-BL-4-FA no hub female adapter connect?
The Watts Blueline NH-BL-4-FA is a 4 inch female adapter with a no hub connection, so it mates to 4 inch no hub (hubless) cast iron or plastic DWV pipe on the no hub side and takes a male threaded fitting on the female side. Order it by the part number NH-BL-4-FA.
2) Is the Watts NH-BL-4-FA Buy American Act compliant for a government or public works job?
No. The NH-BL-4-FA Blueline female adapter is recorded as not Buy American Act compliant, so on a federally funded project with BAA or Buy America language in the spec you will need a different adapter.
3) Does the no hub end of the NH-BL-4-FA need a clamp, or is it a gasketed push fit?
A no hub joint is not self-sealing. The 4 inch no hub end of the NH-BL-4-FA is made up with a standard no hub coupling, meaning a neoprene gasket inside a stainless shield with worm-drive clamps, torqued to the coupling maker's spec. Budget that coupling separately, it does not come with the adapter.
4) Watts no hub female adapter vs a male adapter, which one do I need?
Go by the mating part. The NH-BL-4-FA gives you female threads, so it receives a male-threaded pipe nipple or fitting. If the piece you are tying into has female threads, you want a male adapter instead, not this one.
5) Can I use the Watts Blueline NH-BL-4-FA on a pressurized water line?
No. It is a drainage fitting. The no hub connection style is used on gravity DWV piping, not on pressure water supply, so keep the NH-BL-4-FA on waste, soil and vent runs.
How fast can I get the Watts NH-BL-4-FA 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 NH-BL-4-FA come with a warranty?
Absolutely. The Watts NH-BL-4-FA 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 NH-BL-4-FA?
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 NH-BL-4-FA 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.