Nibco 5151-W-3 Thread Flange -...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$68.33
Nibco 5151-W-3 Thread Flange - Corzan® CPVC Schedule 80, One-Piece Webbed Design

Nibco 5151-W-3 Thread Flange - Corzan® CPVC Schedule 80, One-Piece Webbed Design

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Model: CB20470

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

$68.33
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The light grey Corzan® CPVC thread flange features a one-piece webbed design and a female NPT thread connection. Chemtrol® CPVC fittings are lightweight, easy to install and maintenance-free. Chemtrol® fittings connect piping lengths together with solvent cementing, threading or flanging to create a highly reliable, leak-free system. Please refer to Chemtrol technical data sheets, chemical resistance guides and catalogs for engineering and installation information. Corzan® CPVC Schedule 80 thermoplastics demonstrate excellent mechanical strength over broad temperature range, outstanding underground performance and superior hydraulics. Chemtrol Corzan® CPVC fittings are lightweight, easy to install, maintenance-free and will not rust, scale, pit or corrode. Chemtrol® premium line of plastic fittings is backed by a 1-year limited warranty. Because Chemtrol® is a NIBCO brand the flow-control fittings are unsurpassed in quality, performance and longevity.

  • Maximum service temperature 210-DegreeF
  • Universal Part No. 1852
  • One-piece webbed design
  • Female NPT thread connections and flange connections compatible with ANSI B16.5 Class 150
  • Do not use or test with compressed air or other gases
  • ASTM F1970
  • NSF/ANSI Standard 14
  • NSF/ANSI/CAN-61

Manufacturer Resources

Product Specs

All Application(s):
Lead-Free
All Basic Material:
CPVC - Chlorinated Polyvinyl Chloride
Classification:
CPVC Sch 80 Flanges
End Connection:
Flanged
Pipe Schedule:
80
Plastic End Connection Type:
F (NPT)
Product Group:
Fitting
Product Type:
CPVC Sch 80 Flanges
System Use:
Commercial Plumbing, Industrial, Irrigation, Lead Free*
Product Subgroup:
Flange
Department:
Plumbing
Product Color:
Light Grey
Product Width:
5.98 in
Product Length:
5.98 in
Product Weight:
0.808 lb
Country Of Origin:
United States
Product Height:
1.09 in

Nibco CB20470 – Frequently Asked Questions

1) Will the Nibco 5151-W-3 CPVC flange bolt up to my existing metal 150# flange?
Yes. The 5151-W-3 flange face and bolt pattern follow ANSI B16.5 Class 150, so it mates with any standard 150-pound drilled companion flange, metal or plastic. Use a full-face gasket and tighten in a cross pattern with even torque, since you are pulling a thermoplastic flange against a rigid mating face.
2) How does the 5151-W-3 connect to the pipe, threaded or solvent weld?
It is a threaded flange, not a socket flange. The hub takes female NPT, so you thread a male NPT pipe end or threaded adapter into it. If your run is being solvent cemented, you would need a socket-style flange instead, or a male adapter cemented to the pipe and threaded into this one.
3) How hot can this Corzan CPVC flange run?
Maximum service temperature is 210 degrees F. That is the headline reason to use CPVC over PVC here, since it holds up on hot water and warm process lines where PVC would not. Remember that pressure rating falls off as temperature climbs, so derate per the Chemtrol data for your operating temp.
4) Can I use this CPVC flange on potable water in a commercial building?
It is listed to NSF/ANSI Standard 14 and NSF/ANSI/CAN 61, and it is catalogued as a lead-free application part, which is what a plumbing inspector looks for on potable water. System uses include commercial plumbing, industrial and irrigation.
5) Can I pressure test a CPVC flanged line with compressed air?
No. Nibco states plainly not to use or test this fitting with compressed air or other gases. Hydrostatic test only. A thermoplastic system failing under stored air energy is a safety problem, not just a leak.
6) What pipe size does the Nibco 5151-W-3 Corzan CPVC flange come in?
2 inch, ordered under Nibco part CB20470. It is Schedule 80, so it pairs with 2 inch Sch 80 CPVC pipe and threaded fittings.
7) Does the Nibco 5151-W-3 flange include bolts and a gasket?
The 5151-W-3 is the flange only. Bolts, nuts, washers and the full-face gasket are separate and need to be ordered for the joint, sized to the ANSI B16.5 Class 150 bolt pattern for 2 inch.
8) Why use a flange here instead of just threading or cementing the joint?
A flange gives you a break point you can take apart. Use one where a pump, valve, strainer or tank nozzle has to come out for service, or where you are transitioning to equipment that is already flanged to ANSI B16.5 Class 150. For a permanent buried or in-wall run, threaded or solvent cemented joints are the lighter and cheaper choice; Chemtrol CPVC systems are joined all three ways.
9) What does the one-piece webbed design on this Nibco flange actually do for me?
The web is the reinforcing rib running from the hub out to the flange face. Being molded as one piece, it carries the bolt load without a separate ring or insert, so there is no two-part flange to assemble and nothing to slip when you torque it down. It also means the whole part is Corzan CPVC, light grey, with no metal to corrode.
10) Is it also known by another part number?
Yes, it carries Universal Part No. 1852, and the Nibco order number is CB20470. Chemtrol is a Nibco brand, so you will see the same fitting referenced under the Chemtrol Corzan CPVC line.
How fast can I get the Nibco CB20470 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 CB20470 come with a warranty?
Absolutely. The Nibco CB20470 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 CB20470?
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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