Nibco S-413-Y Check Valve - Br...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$269.24
Nibco S-413-Y Check Valve - Bronze, Class 125, PTFE Seat Disc

Nibco S-413-Y Check Valve - Bronze, Class 125, PTFE Seat Disc

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Model: NJ7400A

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

$269.24
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The NIBCO® check valve features a screw-in bonnet for accessibility to repair or replace parts. Swing check valves 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 are 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
  • Y-pattern
  • Renewable PTFE disc
  • Regrindable seat
  • Class 125 solder end connections
  • Use in U.S. drinking water applications is prohibited after January 3, 2014
  • Conforms to MSS SP-139

Check Valve Bronze Swing IOM Manual

Manufacturer Resources

Product Specs

All Basic Material:
Bronze
Classification:
Swing Bronze Check Valves
End Connection:
Solder
Product Group:
Valve
Seat Seal Material:
PTFE
Type of Check Valve:
Swing
Type of Valve:
Check Valve
Valve End Connection Type:
S -- Female Solder Cup
Valve Multi Turn Bonnet Design:
Screw-in Bonnet
Valve Pressure Rating (CWP):
200 PSI / 13.8 Bar CWP
Valve Pressure Rating (SWP):
125 PSI / 8.6 Bar SWP
Valve Trim Package:
PTFE Disc
Product Subgroup:
Valves
Product Type:
Swing Bronze Check Valves
Department:
Plumbing

Nibco NJ7400A – Frequently Asked Questions

1) Can the Nibco S-413-Y bronze swing check valve be installed vertically?
Only in a vertical run where flow moves upward. The S-413-Y is a swing check, so the disc relies on gravity and flow to seat. Horizontal installation is fine; vertical with downward flow is not, because the disc will not close against the flow direction.
2) Is the Nibco S-413-Y check valve approved for potable drinking water?
No. Use of the S-413-Y in U.S. drinking water applications is prohibited after January 3, 2014. It is intended for non-potable service such as hydronic heating, steam, and mechanical or industrial piping. For potable water you need a lead-free bronze check valve.
3) What are the pressure and temperature limits on the Nibco S-413-Y bronze check valve?
200 psi (13.8 bar) non-shock cold working pressure, and 125 psi (8.6 bar) saturated steam up to 353 degrees F (178 degrees C). That steam rating is what makes it a Class 125 valve and suits it to low pressure steam and condensate as well as hydronic water lines.
4) How does the S-413-Y connect to copper pipe, and do I need adapters?
It has female solder cups on both ends, sized Class 125, so it sweats directly onto copper tube of the matching nominal size. No adapters or unions needed. If your line is threaded iron pipe, this is the wrong end connection and you want a threaded bronze check instead.
5) Can this check valve be repaired in place instead of cut out and replaced?
Yes, and that is the point of the design. The S-413-Y uses a screw-in bonnet, so the bonnet backs out for access to the internals. The PTFE disc is renewable and the seat is regrindable, so a valve that starts weeping can be serviced rather than desoldered off the line.
6) What pipe sizes does the Nibco S-413-Y swing check valve come in?
Eight sizes, 1/4, 3/8, 1/2, 3/4, 1, 1-1/4, 1-1/2 and 2 inch. Order by size using the part number: 1/2 inch is NJ74006, 3/4 inch is NJ74008, 1 inch is NJ7400A, and 2 inch is NJ7400D.
7) What is a Y-pattern swing check and when should I use one instead of a standard swing check body?
The S-413-Y is a Y-pattern bronze swing check, meaning the bonnet sits at an angle to the run rather than straight up. That angled bonnet gives you room to pull the disc for service in tight mechanical rooms, and it keeps the flow path straighter than a straight-through swing body. If the line runs vertically downward or sees pulsating flow, a swing check of any pattern is the wrong choice; go to a spring-loaded or silent check.
8) Why a PTFE disc rather than bronze or composition on this Nibco check valve?
The PTFE disc gives the S-413-Y a soft seat that seals tight at low differential pressure and stands up to the 353 degree F steam rating. PTFE is also chemically broad, which is why Nibco points you to their chemical resistance guide for anything beyond water and steam. The disc is replaceable, so the seal material is a wear part, not a throwaway.
9) Does the Nibco S-413-Y meet a recognized valve standard for spec work?
It conforms to MSS SP-139, the standard covering copper alloy swing check valves. Body is bronze with Class 125 solder ends, which is what most commercial mechanical schedules call out for hydronic and low pressure steam branch lines.
10) Will soldering this valve into the line damage the PTFE disc?
Heat is the thing to watch. The S-413-Y's PTFE disc sits inside the body, so on the smaller sizes especially, back the screw-in bonnet out and remove the disc before you sweat the joints, then reassemble once the body has cooled. Nibco's Bronze Swing Check IOM manual covers the procedure.
How fast can I get the Nibco NJ7400A 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 NJ7400A come with a warranty?
Absolutely. The Nibco NJ7400A 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 NJ7400A?
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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