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Product Specs
- Buy American Act Compliant:
- No
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Valves
- Product Type:
- General Valve
Watts NH-BL-4-90E – Frequently Asked Questions
1) What size and angle is the Watts NH-BL-4-90E no hub elbow?
It's a 4 inch, 90 degree elbow with no hub connections on both ends, part of the Watts Blueline no hub fitting line. The 90 degree turn is the standard quarter bend used to take a drain line from horizontal to vertical or vertical to horizontal.
2) How does a no hub elbow like the Watts NH-BL-4-90E connect to the pipe?
No hub means there is no bell or socket on either end. The plain ends of the 4 inch elbow butt against the plain ends of your pipe and the joint is made with a no hub coupling, a neoprene gasket inside a stainless steel shield clamped over the joint. No solvent, no lead and oakum, no threading, and the joint can be taken apart later by loosening the clamps.
3) Will the Watts NH-BL-4-90E work on a federal or Buy American job?
No. The NH-BL-4-90E is listed as not Buy American Act compliant, so it won't satisfy a federal, GSA, or other contract that carries a BAA or Buy America domestic sourcing clause. On those jobs you'll need a domestically produced no hub fitting instead.
4) Do I need anything besides the elbow to make up the joint?
Yes, two no hub couplings, one for each end. The NH-BL-4-90E ships as the 4 inch fitting only; the shielded couplings that clamp it to the adjoining pipe are a separate item, and you'll want a torque wrench set to the coupling manufacturer's inch-pound spec so the bands seat evenly.
5) Can I use a 4 inch no hub 90 elbow at the base of a stack?
A short pattern 90 like this one is normally used for horizontal to vertical turns, vents, and fixture arms. At the base of a soil stack most codes and designers call for a long sweep or two 45s to ease the flow rather than a standard quarter bend, so confirm what your drawing or local code requires for that specific location before setting this one in.
6) Is the Watts NH-BL-4-90E a drainage fitting or a pressure fitting?
It's a drainage fitting. No hub cast fittings in the Blueline family are used on gravity DWV systems, soil, waste, and vent. They are not rated for pressure service, so don't put it on a water supply or a pumped pressure line.
How fast can I get the Watts NH-BL-4-90E 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-4-90E come with a warranty?
Absolutely. The Watts NH-BL-4-90E 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-4-90E?
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installation tips, and troubleshooting. Contact Us
Why buy the Watts NH-BL-4-90E from ZenSupply?
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