Spears P102 Series PVC DWV Inc...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.85
Spears P102 Series PVC DWV Increaser-Reducer, Hub x Hub

Spears P102 Series PVC DWV Increaser-Reducer, Hub x Hub

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Model: P102-251

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

$2.85
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Spears P102 Series PVC DWV Increaser-Reducer, Hub x Hub

The Spears P102 Series PVC DWV Increaser-Reducer is a solvent-weld, Hub x Hub (HxH) fitting engineered to transition pipe diameters within drain, waste, and vent (DWV) piping systems. Molded from durable PVC, this increaser-reducer is available in sizes ranging from 1-1/2" through 6" to fit a wide range of DWV layouts. The hub x hub configuration allows both ends to be solvent-welded directly into the run, letting installers step pipe diameter up or down with a single fitting instead of stacking multiple couplings, streamlining rough-in work on both residential and commercial drainage systems. This DWV increaser-reducer is a practical choice whenever a drain, waste, or vent line needs to change diameter without introducing extra fittings or joints into the run.

Key Features

  • Trade Size Range: Offered in sizes from 1-1/2" up to 6" to match diameter transitions across a variety of DWV piping runs.
  • Durable Construction: Molded from PVC for corrosion resistance and long-term performance in drain, waste, and vent applications.
  • Hub x Hub (HxH) Connection: Solvent-weld hub ends on both sides provide a secure, leak-resistant joint without threading or additional adapters.
  • Increaser-Reducer Design: A single fitting handles the diameter transition, reducing the number of joints and connection points needed in a run.
  • Lightweight PVC Material: Easier to handle, cut, and solvent-weld than metallic alternatives, while resisting the corrosive effects of waste and vent gases.
  • Consistent Fit: Precision-molded hub openings help ensure a reliable, properly aligned solvent-weld joint at each transition point.
  • Space-Saving Transition: Combines the increase and reduce function of two separate fittings into one compact hub x hub body.

Technical Specifications

  • Product Type: PVC DWV Reducer
  • Product Size Range: 1-1/2" to 6"
  • Connection: Hub x Hub (HxH)
  • Material: PVC

Typical Applications

  • Drain, Waste, and Vent (DWV) Piping Systems
  • Residential and Commercial Plumbing Installations
  • Pipe Diameter Transitions in Vertical or Horizontal DWV Runs
  • New Construction Plumbing Rough-In
  • Plumbing System Repairs and Retrofits

Why Spears?

Spears PVC DWV fittings are precision-molded to deliver a consistent, reliable fit for solvent-weld drain, waste, and vent systems. Choosing a PVC increaser-reducer from Spears gives plumbing professionals a corrosion-resistant, easy-to-install solution for managing pipe diameter transitions without sacrificing joint integrity, helping keep DWV installations code-compliant and leak-free from rough-in through final tie-in. With sizes spanning 1-1/2" to 6", the P102 Series gives contractors and installers a dependable option for nearly any DWV diameter change.

Product Specs

Product Type:
PVC DWV Reducer
Department:
Plumbing
Product Group:
PVC & CPVC Fittings
Product Subgroup:
Fittings and Valves
list_batch:
SPR-20260918
Product Material:
PVC
Connection Type:
Hub x Hub

Spears P102-251 – Frequently Asked Questions

1) What sizes does the Spears P102 PVC DWV increaser-reducer come in?
The P102 Series spans trade sizes 1-1/2 inch through 6 inch. Two orderable part numbers at the ends of that range are P102-251 at 1-1/2 inch and P102-532 at 6 inch. Pick the size that matches the transition you need in the DWV run.
2) Are both ends of the Spears P102 increaser-reducer solvent weld, or is one threaded?
Both ends are hub, so the fitting is solvent welded on each side. There is no threading and no adapter needed, which means it drops straight into a PVC DWV run with primer and cement.
3) Do I need two couplings and a bushing to step 3 inch drain down to 2 inch, or is one fitting enough?
One fitting handles it. The P102 increaser-reducer makes the diameter change in a single hub x hub body, so you are not stacking a coupling and a bushing and adding two extra joints to the run. Fewer joints means fewer places to leak and less stack height to find in a tight ceiling or wall cavity.
4) What material is the Spears P102 reducer, and will it hold up to sewer gas?
It is molded PVC. PVC resists corrosion from waste and vent gases, which is why it is the standard for drainage work where cast iron or steel would eventually attack. It also cuts and cements far easier than metal on a rough-in.
5) Can I use the P102 increaser-reducer in a vertical stack as well as a horizontal drain?
Yes, it is used for diameter transitions in both vertical and horizontal DWV runs, in new-construction rough-in and in repair or retrofit work on existing drainage.
6) Where do I find laying lengths and socket depths for the Spears P102 DWV fittings?
Spears publishes dimensional data for its PVC DWV fittings in two downloadable references: a DWV dimensions sheet and a PVC DWV fittings dimensions sheet. Use those for socket depth and overall take-out when you are cutting pipe to length.
How fast can I get the Spears P102-251 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 Spears P102-251 come with a warranty?
Absolutely. The Spears P102-251 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 Spears P102-251?
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
Why buy the Spears P102-251 from ZenSupply?
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