Schedule 80 PVC Pipe Nipples, 4" Length – Threaded Both Ends, 1/2" to 2"

4-Inch Schedule 80 PVC Threaded Nipples for Chemical Feed Lines

Product Overview

Schedule 80 PVC pipe nipples in 4-inch length with NPT threads on both ends. Six sizes from 1/2" to 2" connect threaded fittings, valves, and instruments in Schedule 80 PVC pipe systems. A common mid-range length for chemical dosing hookups and valve connections. Not for compressed air or gas.

Quick Specs

• Material: Schedule 80 PVC (gray)

• Length: 4"

• Sizes: 1/2", 3/4", 1", 1-1/4", 1-1/2", 2"

• Threads: NPT both ends per ANSI/ASME B1.20.1

• Standard: ASTM D1785

• Certifications: NSF/ANSI 14 and 61

• Temperature range: 33°F (1°C) to 140°F (60°C)

Key Features of Schedule 80 PVC Pipe Nipples 4 Inch Length

• Schedule 80 wall thickness handles higher working pressure than Schedule 40, used in chemical feed, dosing, and process piping.

• PVC resists sodium hypochlorite, acids, alkalis, and salts without a protective coating or cathodic protection.

• Certified to NSF/ANSI 61 (potable water contact) and NSF/ANSI 14 (water treatment system components).

• Mix of molded and machined variants by size, both manufactured to ASTM D1785 and perform identically.

Available Sizes

Need a different length? Also available in 3" length and 6" length. For flush connections, see Schedule 80 PVC close nipples.

Applications

• Chemical dosing and sodium hypochlorite feed lines

• Water and wastewater treatment plant connections

• Threaded valve, gauge, and sensor hookups

• Short piping runs between Schedule 80 PVC fittings

• RO, filtration, and water conditioning systems

Buy Schedule 80 PVC Pipe Nipples 4 Inch Online from Cleanflow

Cleanflow Utility Supply Company is an authorized distributor with all six sizes in stock. Orders over $199 ship free, and every order includes 30-day returns. Save more when you mix and match volume discounts, starting at just 6 pieces across any Schedule 80 PVC fittings. Select your size above or contact us for bulk pricing.

Frequently Asked Questions

How do I choose between 3", 4", and 6" nipple lengths? 

Choose based on the space between your threaded connections. Use 3" for tight fits, 4" for standard valve and instrument hookups, and 6" where you need extra clearance for wrenching or maintenance access.

Can I use PVC nipples for compressed air lines? 

No. PVC is not rated for compressed air or gas; it can shatter under pneumatic pressure. Use metal or approved plastic systems for compressed air.

What thread sealant should I use? 

PTFE-based thread sealant compound, applied to the male thread only. Hand-tighten plus one to two turns with a strap wrench. Over-tightening cracks PVC.

What is the difference between molded and machined? 

Molded nipples are injection-molded as one piece. Machined nipples are cut and threaded from Schedule 80 pipe stock. Both meet ASTM D1785.