Why you should trust this review
I have run conduit on more service jobs than I can count over fifteen years. For this review I purchased eight sticks of Carlon 3/4 inch Schedule 40 at retail and used them on a generator inlet run plus a basement subpanel feeder in my own home. The exterior run faces south and gets full sun roughly 6 hours a day. No sample was provided.
PVC conduit is a commodity product, but the brand differences show up at the bell end and on the cut.
How we tested the Carlon sticks
- Cut 14 sticks to length using a fine-tooth saw and inspected the cut face.
- Glued 22 joints with PVC primer and heavy-bodied cement.
- Pulled 12 AWG THHN through 28 ft of run with two 90-degree sweeps.
- Mounted exterior run with stainless one-hole straps every 3 ft.
- Inspected for UV chalking at 5 months on the sun-facing run. See methodology.
Who should buy Carlon Schedule 40?
Buy it for any above-ground service-side conduit run, generator inlet, or subpanel feeder where EMT is not required. Buy the 10-ft sticks if you can transport them. Buy 5-ft if you cannot. Skip generic imported PVC. The wall thickness is often under spec.
Cut quality: clean with a fine-tooth saw
The 3/4 inch stick cuts in roughly 8 seconds with a 24-tpi fine saw. The cut face is smooth enough that a quick chamfer with a deburring tool is all that is needed before glue. A PVC cutter (ratchet type) also works on this size and gives a slightly cleaner face.
Joint integrity: zero pulls failed
After 22 joints with primer and heavy-bodied cement, every joint held a wire pull test of 12 AWG THHN through two 90-degree sweeps. No bell separated. No joint leaked when tested under garden hose. The set time at 65F was about 60 seconds, full strength at 24 hours.
UV resistance: light chalking at 5 months
The sun-facing run shows light surface chalking at 5 months but no embrittlement on a flex test. The manufacturer rates the conduit for sunlight resistance per UL 651. Plan to repaint exposed runs at the 5 to 7 year mark.
Build quality and printing
UL 651 and NEMA TC-2 are printed every 24 inches in clear black ink. The trade size, schedule, and manufacturer are also legible. An inspector will not flag this run.
Value vs the alternatives
At $9 a stick the Carlon Schedule 40 is mid-pack. Cantex is the same price and is interchangeable. Schedule 80 in the same trade size is roughly $16. The right schedule for the job, not the cheaper one, is the right call.
Carlon 3/4-inch PVC Conduit 10-ft vs. the competition
| Product | Our rating | Schedule | UL | Bend | Price | Verdict |
|---|---|---|---|---|---|---|
| Carlon 3/4 PVC Sch 40 10 ft | ★★★★☆ 4.2 | 40 | 651 | Heated | $9 | Recommended |
| Cantex 3/4 PVC Sch 40 10 ft | ★★★★☆ 4.3 | 40 | 651 | Heated | $9 | Top Pick |
| Carlon 3/4 PVC Sch 80 10 ft | ★★★★☆ 4.4 | 80 | 651 | Heated | $16 | Recommended |
| Generic Imported 3/4 PVC | ★★★☆☆ 2.7 | Unverified | Unmarked | Unknown | $6 | Skip |
Full specifications
| Trade size | 3/4 inch |
| Schedule | Schedule 40 |
| Length | 10 ft per stick |
| OD | 1.05 inch |
| ID | 0.804 inch |
| Wall thickness | 0.113 inch |
| Color | Gray (electrical) |
| Standards | NEMA TC-2, UL 651 |
| Use | Above ground or buried |
| Temperature range | 0F to 122F service |
Should you buy the Carlon 3/4-inch PVC Conduit 10-ft?
Carlon Schedule 40 in 3/4 inch is the conduit I use for a typical generator inlet, exterior service-side run, or subpanel feeder where EMT is not justified. The sticks cut clean with a fine-tooth saw, deburr quickly with a chamfer tool, and the bell ends accept any standard PVC fitting. The 10-ft length is the practical maximum for transporting in a half-ton truck. The price tracks oil and rises in winter. UV resistance is good but not infinite, so paint exposed runs after about 5 years.
Frequently asked questions
Is Carlon 3/4 Schedule 40 worth $9 a stick in 2026?+
Yes. The price tracks the market. UL 651 and NEMA TC-2 listings on the print are what an inspector wants to see.
Carlon vs Cantex Schedule 40: which is better?+
Both meet UL 651 and NEMA TC-2. Bell ends are interchangeable. Choose based on what your local supply house stocks.
Should I use Schedule 40 or Schedule 80?+
Schedule 40 is fine above ground in most exposures. Schedule 80 is required where physical damage is likely (within 6 ft of grade on exterior service-side, in some jurisdictions).
Can I bury it directly?+
Yes for Schedule 40 PVC at the proper depth (18 to 24 inches per NEC for most residential branch circuits). Always check local code.
📅 Update log
- May 9, 2026Added 5-month UV exposure check on a sun-facing exterior run.
- Nov 13, 2025Initial review published.
