Nibco T-453-B Check Valve - Br...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$312.91
Nibco T-453-B Check Valve - Bronze, Class 200 Threaded

Nibco T-453-B Check Valve - Bronze, Class 200 Threaded

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Model: NL8300A

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

$312.91
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The NIBCO® bronze check valve features threaded end connections for ease of installation. 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 are backed by the NIBCO 5-year 125% limited warranty.

  • 200 psi/13.8 bar saturated steam to 391-DegreeF/201-DegreeC
  • 400 psi/27.6 bar non-shock cold working pressure
  • Y-pattern
  • Renewable bronze disc
  • Regrindable seat
  • Class 200 threaded end connections
  • Use in U.S. drinking water applications is prohibited after January 3, 2014
  • Conforms to MSS SP-80

Check Valve Bronze Swing IOM Manual

Manufacturer Resources

Product Specs

All Basic Material:
Bronze
Classification:
Swing Bronze Check Valves
End Connection:
Threaded
Product Group:
Valve
Seat Seal Material:
Bronze
Type of Check Valve:
Swing
Type of Valve:
Check Valve
Valve End Connection Type:
T -- Female NPT Thread (FIPT)
Valve Multi Turn Bonnet Design:
Screw-in Bonnet
Valve Pressure Rating (CWP):
400 PSI / 27.6 Bar CWP
Valve Pressure Rating (SWP):
200 PSI / 13.8 Bar SWP
Product Subgroup:
Valves
Product Type:
Swing Bronze Check Valves
Department:
Plumbing

Nibco NL8300A – Frequently Asked Questions

1) Can a Nibco T-453-B bronze swing check valve be installed vertically?
Vertical is fine only if the flow is moving up. The T-453-B swing check works in horizontal runs, or vertical with upward flow. Install it with flow going down through a vertical riser and the disc will not seat the way it needs to. Orientation is the single most common way a swing check gets put in wrong.
2) Does the T-453-B thread onto standard NPT pipe or does it need adapters?
Both ends are female NPT (FIPT), so it threads straight onto male NPT pipe nipples or fittings of the matching size with no adapter. That is what the T in the T-453-B designation means. If your line is copper, you need male adapters soldered on first, or a solder-end check instead.
3) Can I use a Nibco T-453-B on a domestic drinking water line?
No. Use of this valve in U.S. drinking water applications has been prohibited since January 3, 2014. It belongs on non-potable service: heating water, condensate, compressed air, oil, and general mechanical and industrial lines. For potable water you need a lead-free bronze check valve instead.
4) What pressure and temperature can the Nibco T-453-B bronze check valve handle?
400 psi (27.6 bar) non-shock cold working pressure, and 200 psi (13.8 bar) saturated steam up to 391F (201C). That steam rating is what makes it usable on a boiler feed or condensate return line, not just cold service. It is a Class 200 body.
5) Can the T-453-B be repaired in place instead of replaced when it starts passing backflow?
Yes, and that is the reason to spec it. The bronze disc is renewable and the seat is regrindable, and the screw-in bonnet lets you open the valve at the union without cutting it out of the line. On a facility with a lot of these, that turns a replacement into a rebuild.
6) Swing check or spring check for a pump discharge line?
A swing check like the T-453-B has a hinged disc that gravity and reverse flow close, so it needs horizontal mounting or upward vertical flow and it adds very little pressure drop. A spring-loaded (silent) check closes before flow reverses and mounts in any orientation, which is what you want on a pump discharge where slam is a concern. For a gravity-friendly run and low head loss, the swing pattern is the cheaper and more serviceable choice.
7) Does the Nibco T-453-B meet MSS SP-80 for bronze check valves?
It conforms to MSS SP-80, the standard covering bronze gate, globe, angle and check valves. That is the spec most mechanical drawings call out for a Class 200 bronze check, so it satisfies a submittal calling for MSS SP-80 threaded bronze.
8) Is the T-453-B all bronze, or does it have iron or plastic internals?
Bronze throughout the wetted path: bronze body construction, bronze disc, and a bronze seat seal. No elastomeric seat to harden or an iron component to rust, which is why it holds a 391F steam rating. It gives the corrosion behavior of a bronze system with no dissimilar metal at the check.
9) What is the Nibco part number for a 1 inch T-453-B check valve?
The 1 inch T-453-B is Nibco item NL8300A. The rest of the run: 1/2 inch is NL83006, 3/4 inch is NL83008, 1-1/2 inch is NL8300C and 2 inch is NL8300D. The T-453-B model designation stays the same across all sizes, so the item number is what distinguishes them on a purchase order.
10) Is a Y-pattern check valve different from a straight-through one?
The T-453-B is a Y-pattern body, meaning the seat sits at an angle to the run rather than square across it. The disc swings clear of the flow path when open, which keeps head loss down compared with a valve that seats perpendicular to the line. It also puts the bonnet on an angle, so allow clearance above the pipe for pulling the disc for service.
How fast can I get the Nibco NL8300A delivered?
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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 NL8300A come with a warranty?
Absolutely. The Nibco NL8300A 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 NL8300A?
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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