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The PVC DWV soil pipe adapter features a hub x spigot connection and connects PVC DWV pipe and soil pipe. 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.
Plastic Fittings Installation Instructions
- 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
Product Specs
- All Application(s):
- DWV Drain / Waste / Vent
- All Basic Material:
- PVC - Polyvinyl Chloride
- Classification:
- PVC DWV Adapters
- End Connection:
- Solvent Weld
- Pipe Schedule:
- 40
- Plastic End Connection Type:
- Hub x Spg
- Product Group:
- Fitting
- Product Type:
- PVC DWV Adapters
- System Use:
- Commercial Plumbing, Residential Plumbing
- Product Subgroup:
- Adapter
- Department:
- Plumbing
- Product Color:
- White
- Country Of Origin:
- United States
Nibco K038550 – Frequently Asked Questions
1) How does the Nibco 4805 soil pipe adapter connect PVC DWV to cast iron soil pipe?
The 4805 is a hub x spigot adapter: the hub end takes PVC DWV pipe by solvent cement, and the spigot end is sized to go into a soil pipe hub. It's a transition fitting between a PVC DWV system and soil pipe, not a mechanical coupling, so the PVC side is glued and the soil pipe side is joined however that system is normally caulked or gasketed.
2) What sizes does the Nibco 4805 soil pipe adapter come in, including reducing sizes?
Six sizes: 1-1/2 x 2 inch, 2 inch, 2 x 3 inch, 3 inch, 3 x 4 inch, and 4 inch. The straight sizes (2, 3, 4 inch) keep the same nominal size across the transition; the others step up, so a 2 x 3 takes 2 inch PVC into a 3 inch soil hub. Part numbers run K038500, K038550, K038650, K038700, K038750 and K038800.
3) Does the Nibco 4805 PVC DWV adapter meet plumbing code for a permitted job?
It's manufactured to ASTM D2665 and D3311, certified to NSF/ANSI Standard 14, and carries NSF U.P. certification for use in potable-adjacent plumbing systems. That's the documentation most inspectors want on a DWV transition. Nibco lists it for both commercial and residential plumbing.
4) I'm tying 2 inch PVC waste into a 3 inch cast iron stack. Which 4805 do I order?
The 2 x 3 inch, part number K038650. The 2 inch hub glues to your PVC branch and the 3 inch spigot goes into the cast iron hub, so you don't need a separate reducing bushing. If the stack is 4 inch and your PVC is 3 inch, use the 3 x 4 (K038750) instead.
5) Is this adapter Schedule 40, and will it match my existing Schedule 40 DWV pipe?
Schedule 40, white PVC. The hub is sized for standard Schedule 40 PVC DWV pipe and is joined by solvent cement, so it drops into an existing white Sch 40 DWV run with no adapter bushing.
6) Can the Nibco 4805 adapter be threaded instead of glued?
On the 4805 itself, no. Both ends are a hub and a spigot, so the PVC side is solvent cemented. Nibco's PVC DWV line as a whole can be joined by solvent cementing or threading, but if you need a threaded connection you want a threaded adapter, not this soil pipe adapter.
7) Will a PVC DWV adapter hold up in a corrosive waste line?
PVC fittings resist corrosion and chemical attack and won't rust, scale, pit or corrode, which is the usual reason crews swap a cast iron transition for PVC on a rehab. Keep the waste stream at or below 140 degrees F.
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Does the Nibco K038550 come with a warranty?
Absolutely. The Nibco K038550 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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