Nibco 4853 Flush Closet Flange...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$21.27
Nibco 4853 Flush Closet Flange with Pipe Stop - PVC DWV

Nibco 4853 Flush Closet Flange with Pipe Stop - PVC DWV

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Model: K355700

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

$21.27
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The PVC DWV flush closet flange features a pipe stop and fits inside 4-inch DWV pipe and over 3-inch DWV pipe. The closet flange is secured to the floor of the dwelling so that a toilet can be affixed to it and allow for a pipe connection (under the floor) to continue the piping for evacuation of the used water. Please refer to NIBCO technical data sheets and catalogs for engineering and installation information. Polyvinyl chloride (PVC) is the most frequently specified of all thermoplastic materials because of its light weight, durability, and cost-effectiveness. PVC DWV is easy to install and is joined by solvent cementing or threading. PVC fittings exhibit high corrosion and chemical resistance and will not rust, scale, pit or corrode. NIBCO® plastic fittings are backed by a 5-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, NIBCO is the preferred brand in the industry.

  • Maximum service temperature 140-DegreeF
  • Do not test or use with compressed air or other gases
  • ASTM D2665 and D3311
  • NSF/ANSI Standard 14
  • NSF U.P. Certified

Plastic Fittings Installation Instructions

Manufacturer Resources

NIBCO Plastic Fittings Catalog

Product Specs

All Application(s):
DWV Drain / Waste / Vent
All Basic Material:
PVC - Polyvinyl Chloride
Classification:
PVC DWV Closet Flanges
End Connection:
Solvent Weld
Pipe Schedule:
40
Plastic End Connection Type:
Hub or Spg (with pipe stop)
Product Group:
Drains and Cleanouts
Product Type:
PVC DWV Closet Flanges
System Use:
Commercial Plumbing, Residential Plumbing
Product Subgroup:
Flashing and Flanges
Department:
Plumbing
Product Color:
White
Country Of Origin:
United States
Product Weight:
0.762 lb
Product Height:
2.75 in
Product Width:
7 in
Product Length:
7 in

Nibco K355700 – Frequently Asked Questions

1) Does the Nibco 4853 closet flange fit 3 inch or 4 inch DWV pipe?
Both. The Nibco 4853 is a hub/spigot combination flange: it fits inside 4 inch DWV pipe and slips over 3 inch DWV pipe, so one part covers either rough-in. It's Schedule 40 PVC DWV and joins by solvent weld.
2) Can I use this PVC closet flange on a commercial job, or is it residential only?
Both. The 4853 PVC DWV flange is listed for commercial and residential plumbing service, and it meets ASTM D2665 and D3311, NSF/ANSI Standard 14, and is NSF U.P. Certified, which is what most inspectors want to see on a DWV fitting.
3) What does the pipe stop on the 4853 closet flange do during installation?
The pipe stop is an internal shoulder that sets how far the pipe seats into the fitting, so the flange lands at a repeatable depth instead of sliding down the riser while the cement sets. That matters on a toilet flange, where the ring has to sit flush on the finished floor for the wax seal to compress correctly.
4) How is the Nibco 4853 flange joined to the drain pipe, and can I thread it on?
It's a solvent weld fitting. Clean and prime the pipe and socket, apply PVC cement, and seat the pipe to the stop. There's no threaded connection on this flange, so if your rough-in ends in a threaded nipple you need a different style of closet flange.
5) What is the temperature limit on this PVC DWV closet flange?
Maximum service temperature is 140 degrees F. That's fine for household drainage and waste, but it rules out any line carrying sustained high-temperature discharge, such as certain commercial dishwashing or boiler blowdown waste. Also, never pressure test PVC DWV with compressed air or other gases.
6) Is the Nibco 4853 a flush flange or a raised one, and does that affect the wax ring?
It's a flush style, meaning the ring sits level with the finished floor rather than standing proud of it. On a flush flange over a standard finished floor, a single standard wax ring normally seals fine; if the flange ends up below the finished floor after tile or a new topping, you'll want an extra-thick ring or a flange extension ring to make up the height.
7) Will a PVC closet flange corrode or rust in a slab or crawlspace?
No. The 4853 is polyvinyl chloride, so it won't rust, scale, pit or corrode, and it resists the chemical attack you get from drain cleaners and waste. The color is white, which is the standard PVC DWV appearance.
8) What is the manufacturer part number for the Nibco 4853 closet flange?
The Nibco 4853 flush closet flange with pipe stop is ordered under MPN K355700, sized for 3 inch or 4 inch DWV pipe. Use that number when matching what's already specified on a plumbing submittal.
How fast can I get the Nibco K355700 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 K355700 come with a warranty?
Absolutely. The Nibco K355700 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 K355700?
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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