Sourcing brass pipe caps from China

Duty on brass pipe caps

Heading 7412 covers copper tube or pipe fittings. Brass pipe caps fall within the copper-alloy fittings line, 7412 20 00 00. The table shows cap variants sharing this code, rather than separate tariff subdivisions.

Read from the UK Trade Tariff on 30 September 2026, the duty for goods from China is 0%. The supplied tariff record lists no anti-dumping or countervailing duty, suspensions or attached import controls for this line.

Confirm the material and fitting function against the commodity code guide. For the wider fittings range, see brass compression fittings.

Specify the cap and its sealing method

Specify the mating pipe or fitting, nominal size, thread form, parallel or tapered thread, engagement depth, body dimensions and wrench flats. State whether sealing relies on the thread, a washer or another seal. Include the seal material, service fluid, operating temperature and pressure, alloy designation and finish in the purchase specification.

For water installations in England and Wales, confirm the applicable Water Fittings Regulations requirements for quality, standard and suitability for the circumstances of use with the local water company. Ask for evidence covering the exact cap and any supplied seal. Agree lead-content limits and dezincification resistance where the application needs them.

For pressure-system applications, ask the supplier to explain whether pressure equipment rules apply to the proposed supply. HSE describes their scope as pressure equipment and assemblies with maximum allowable pressure above 0.5 bar. Confirm applicability before agreeing marking or documentation.

Worked duty example

Illustrative example, not a quote: Illustrative mixed-size carton order of brass threaded pipe caps 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: use the agreed gauges and mating fittings to check thread form, engagement and freedom from burrs or damaged starts.

Body and alloy: measure the closed-end thickness and body dimensions against the drawing, and match batch material reports to the ordered alloy.

Sealing: check washer presence, material and seating where supplied; pressure-test assembled samples using the agreed mating fitting and sealing method.

Arrival and packing: separate sizes, inspect sealing faces and threads for transit damage, and check batch identification. Use the inspection guide to brief the inspection.

What goes wrong

A cap can screw onto a fitting yet fail to seal because the thread form, seating face or washer differs from the approved sample. Shallow engagement, rough sealing faces and damaged threads are reasons to investigate leaks. Compare samples with the actual mating fitting before approving production.

A brass appearance does not establish the alloy. Ordinary brass supplied against a dezincification-resistant specification or lead content above the agreed limit can fail the buyer's material checks. Retain the approved sample, drawing and batch reports, and compare arrival samples before releasing stock.

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.