Sourcing brass threaded pipe adaptors from China
Brass threaded pipe adaptors from China carry 0% UK duty under the copper-alloy fittings line, with no listed trade remedies. For drinking-water use in England and Wales, confirm the applicable quality, standard and suitability requirements with the relevant water authority. Specify each thread and sealing method. Cambridge China Bridge sources brass threaded pipe adaptors.
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Zero duty on brass threaded pipe adaptors
Heading 7412 covers copper tube or pipe fittings. Brass threaded pipe adaptors fall within the copper-alloy fittings line, 7412 20 00 00. The table shows adaptor variants sharing this commodity line. See the copper and brass pipe fittings guide for the wider heading.
Read from the UK Trade Tariff on 30 September 2026, the duty for goods from China was 0%. The supplied tariff record lists no anti-dumping or countervailing duties, suspensions or attached import controls for this line.
Confirm the material, connecting ends and function against the commodity code guide. Describe the goods as pipe adaptors rather than simply brass parts, and give your customs broker the drawing and material specification.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Brass male-to-female threaded pipe adaptors | 7412 20 00 00 | 0% | None |
Specify threads, sealing faces and brass alloy
Specify the thread designation, nominal size, pitch, male or female ends, and whether each thread is parallel or tapered. Show the sealing method on the drawing: thread sealant, a washer or another specified seal. Include engagement length, bore, wall thickness, spanner flats and any plating. Approve samples with the actual mating fittings.
Name the brass alloy and request a batch material report. Agree a lead-content limit and dezincification resistance where the intended water conditions call for it. Match any buyer-requested approval evidence to the exact adaptor range.
For pressurised service, confirm the applicable classification before agreeing markings or documents. The Pressure Equipment (Safety) Regulations cover design, manufacture and conformity assessment of pressure equipment and assemblies with maximum allowable pressure above 0.5 bar. Ask the supplier to explain how the intended adaptor or assembly is treated.
Worked duty example
Illustrative example, not a quote: Illustrative order of mixed cartons of brass threaded pipe adaptors under 7412 20 00 00, invoiced at £10,920 free on board, with £2,600 of freight and insurance to the UK. The customs value is £13,520. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £13,520, so it is £2,704. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Threads: check each end with the agreed go and no-go gauges, then assemble samples with the intended mating fittings. Check engagement, damaged crests and cross-threading.
Body and alloy: measure bore, wall thickness and spanner flats against the drawing. Match batch material reports to the delivered goods and test alloy composition where agreed.
Sealing: inspect washer seats, sealing faces and internal burrs. Pressure-test assembled samples using the specified sealing method and agreed test conditions.
Packing and identity: keep sizes and thread types separate, protect exposed threads and check carton labels against contents. Record results through the quality inspection process.
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What goes wrong
Similar-looking threads can be supplied with different pitches or taper, so an adaptor starts into a mating fitting but binds or leaks. Rough sealing faces, short engagement and thin walls also cause failures. A coating can conceal machining defects, while brass colour alone does not establish the alloy.
Put the thread details and sealing method on the purchase drawing rather than relying on a catalogue photograph. Retain an approved assembled sample, check each delivered variant and trace material reports to batches. Mixed cartons and damaged external threads can make otherwise acceptable stock unusable.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.
Frequently asked questions
What is the UK import duty on brass threaded pipe adaptors from China?
The supplied tariff record dated 30 September 2026 shows 0% duty under 7412 20 00 00, with no listed anti-dumping or countervailing duty.
How do I specify the threads on brass pipe adaptors?
State the thread designation, size, pitch, male or female ends, parallel or tapered form, engagement length and sealing method. Approve samples with the intended mating fittings.
What evidence should I request for drinking-water adaptors?
For England and Wales, confirm the applicable quality, standard and suitability requirements with the relevant water authority. Request evidence for the exact adaptor range, plus its alloy specification and batch material reports.
Why do brass threaded adaptors leak?
Check for mismatched threads, inadequate engagement, damaged crests, rough sealing faces and the wrong sealing method. Gauge the threads and pressure-test samples assembled with the intended mating fittings.