Pre-shipment inspection
AQL sampling per model, markings, packing and documents on high-volume orders.
What is made in Taizhou
Taizhou’s two main clusters for our buyers are Yuhuan, where workshops typically make brass plumbing, sanitary and HVAC valves and fittings, and Wenling, known for pumps and motors. Orders are often high-volume with many sizes, so a clear sampling plan and thread and dimensional checks matter most.
- Brass ball valves, gate valves and stop valves for plumbing
- HVAC valves, radiator and manifold valves
- Water pumps and motors (Wenling)
- Fittings and valve parts
We do not publish or recommend factory names. We inspect the factory you have chosen, against your PO.
At a glance
- Base
- Ningbo High-tech Zone, Zhejiang
- Inspector
- Kevin Lyu (吕中国), independent valve & machinery inspector
- Rate
- USD 220–260 per man-day plus travel, quoted in writing first
- Report
- English, normally within 24 hours of the visit
Inspection services in Taizhou
The factory performs pressure tests on its own bench; we witness, time and record them.
DUPRO
In-process checks of forgings, machining and assembly while defects can still be corrected.
Thread, dimensional and material checks
Thread gauges against the specified thread standard, critical dimensions against the drawing, and material checks such as PMI if ordered.
Pressure test witnessing
Seat and shell tests on the factory’s bench, to the standard and pressure named in your PO.
Getting to Taizhou from Ningbo
Indicative only. Road distances and times are estimates; train times are the fastest scheduled services.
| Location | Road distance | Driving | High-speed rail |
|---|---|---|---|
| Taizhou — Wenling | ~219 km | ~3.4 h | fastest ~1 h 7 min |
| Taizhou — Yuhuan | ~235 km | ~4 h | no direct line (via Wenling) |
Wenling is a same-day trip on an early high-speed train. Yuhuan has no direct rail line, so we travel via Wenling and continue by road; a full PSI day is still usually possible without an overnight stay. Travel cost — actual cost or a fixed surcharge — is quoted in writing before you confirm.
See all coverage and travel times, the Zhejiang valve clusters buyer’s map and pricing.
We report facts from the samples inspected; we do not issue product certificates or accreditation marks.
Last updated: 2026-11-14