Nibco F-918-B Check Valve - Ca...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,007.89
Nibco F-918-B Check Valve - Cast Iron, Swing, Flanged

Nibco F-918-B Check Valve - Cast Iron, Swing, Flanged

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Model: NHE300D

In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,007.89
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The NIBCO® cast iron check valve features flanged end connections for easy installation. It is equipped with a bolted bonnet for maintenance accessibility. Swing checks may be installed in horizontal positions (or vertical with flow moving up). Please refer to NIBCO technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Choose NIBCO® check valves for the most specified, versatile and economical valve option in commercial, mechanical and industrial applications. NIBCO® check valves backed by the NIBCO 5-year 125% limited warranty.

  • 125 psi/8.6 bar saturated steam to 353-DegreeF/178-DegreeC
  • 200 psi/13.8 bar non-shock cold working pressure
  • Bronze mounted trim
  • Bolted bonnet
  • Renewable seat and disc
  • Class 125 flanged end connections
  • Use in U.S. drinking water applications is prohibited after January 3, 2014
  • Conforms to MSS SP-71 Type 1

2" Through 12" Class 125, 150 & 250 Threaded and Flanged End Cast Iron, 3% NI Iron, and Ductile Iron Horizontal Swing Check Valves IOM Manual

Manufacturer Resources

Product Specs

All Application(s):
Irrigation
All Basic Material:
Cast Iron
Classification:
Swing Cast Iron Check Valves
End Connection:
Flanged
Product Group:
Valve
Seat Seal Material:
Bronze
Type of Check Valve:
Swing
Type of Valve:
Check Valve
Valve End Connection Type:
F -- Flanged
Valve Multi Turn Bonnet Design:
Bolted Bonnet
Valve Pressure Rating (CWP):
200 PSI / 13.8 Bar CWP
Valve Pressure Rating (SWP):
125 PSI / 8.6 Bar SWP
Valve Trim Package:
Bronze Trim
Product Subgroup:
Flanges
Product Type:
Swing Cast Iron Check Valves
Department:
Plumbing

Nibco NHE300D – Frequently Asked Questions

1) Can a Nibco F-918-B cast iron swing check valve be installed vertically?
Only in a vertical line where flow moves upward. A swing check relies on gravity and flow to close the disc, so the F-918-B works in horizontal runs or in vertical piping with upward flow. Put it in a downward-flow leg and the disc will not seat.
2) What pipe sizes does the Nibco F-918-B flanged check valve come in?
Six sizes: 2, 2-1/2, 3, 4, 6 and 8 inch. Order by size, for example NHE300D for the 2 inch and NHE300L for the 8 inch. All of them are Class 125 flanged, so the valve bolts between mating Class 125 cast iron flanges without any threading or welding.
3) Can I use the Nibco F-918-B check valve on a potable water line?
No. Use of this cast iron check valve in U.S. drinking water applications is prohibited after January 3, 2014. It is for non-potable service, irrigation and similar commercial, mechanical and industrial systems. For domestic water you need a lead-free rated check valve instead.
4) What pressure is the Nibco F-918-B rated for?
200 psi (13.8 bar) non-shock cold working pressure, and 125 psi (8.6 bar) saturated steam to 353 F (178 C). That covers most chilled water, condenser water, irrigation and low pressure steam service. If your system design pressure is above 200 psi cold, this Class 125 body is the wrong valve.
5) Is the Nibco F-918-B check valve repairable, or do I have to replace the whole valve when it leaks by?
Repairable in line. The F-918-B uses a bolted bonnet and a renewable seat and disc, so you can unbolt the top, pull the disc and reface or replace the seating parts without cutting the valve out of the piping. That matters on a large 6 or 8 inch flanged valve where removal means dropping a section of pipe.
6) What standard does the Nibco F-918-B swing check valve conform to?
MSS SP-71 Type 1, the standard for gray iron swing check valves with flanged ends. If a mechanical spec calls out MSS SP-71 Type 1 Class 125 iron body bronze mounted swing check, the F-918-B answers it.
7) Should I use a flanged check valve or a threaded one on a 4 inch line?
At 4 inches and up, flanged is the practical choice, and the F-918-B is flanged in every size from 2 through 8 inch. Threaded iron gets difficult to make up and nearly impossible to service at those diameters, while flanged ends let you unbolt the valve for seat and disc work. Below 2 inches this valve is not an option at all; the smallest size offered is 2 inch.
8) What do I need to order besides the check valve itself to install it?
Flange bolts, nuts and gaskets are the install items, and the valve does not include them. The F-918-B has Class 125 flanged ends, so you need mating Class 125 flanges on the pipe plus a full face gasket and a bolt set sized to that flange. Nothing has to be threaded or soldered.
9) Will a Nibco F-918-B hold back flow in an irrigation main?
That is a listed application for it. The F-918-B is rated for irrigation service at 200 psi cold working pressure, with bronze trim to keep the seat sealing in water service. It is not a backflow preventer and it is not permitted on potable water, so it belongs on the non-potable irrigation side of the system.
How fast can I get the Nibco NHE300D 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 Nibco NHE300D come with a warranty?
Absolutely. The Nibco NHE300D 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 Nibco NHE300D?
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
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