Description

Brass Brake Pipe 3-Way T-Piece M10 x 1mm Female

Solid brass 3-way brake pipe T-piece with three M10 x 1mm female ports, for 3/16″ (4.75mm) pipe with M10 x 1 male unions. Splits one brake line into two – rear axle feeds, dual-line conversions, brake light switches and kit car builds. Supplied by EMS Spares, Leicester – over 30 years in automotive components.

Specification

* Reference numbers are for identification and cross-reference only. EMS Spares is an independent UK supplier and has no connection with the owners of these part numbers. All dimensions are approximate.

Buyer’s guide: brake pipe T-pieces explained

What does a brake T-piece do?

A 3-way T-piece splits one brake pipe into two – typically the rear brake line feeding left and right wheels, or adding a brake light switch or gauge. Each port takes a male union on a flared pipe, which seals against the seat inside the port.

Step 1 – identify your thread (the most common mistake)

Tip: M10 x 1 and 3/8″ UNF look almost the same and will start to screw together, then bind. M10 x 1 and M10 x 1.25 also look alike. Never force a fitting. Measure the male thread (10mm = M10, 9.5mm = 3/8″) and check the pitch with a thread gauge.

Step 2 – ports and unions

• Female ports (this part): each port takes a male M10 x 1 union on a flared pipe – see our EMS-A2 (long) and EMS-A2s (short) male unions.
• Check the number of ports you need and whether any port must be blanked off – see our EMS-A2D blanking plug.

Step 3 – pipe size and flare

For 3/16″ (4.75mm) outside-diameter pipe, the standard UK car brake pipe size. Suits copper-nickel (Kunifer), copper and steel brake pipe. Match the flare on your pipe to the port it screws into – most metric ports take a DIN (inverted) or ISO bubble flare; if in doubt, copy the flare on your old pipe.

How to fit – good practice

1. Clean the ports and check each seat is free of dirt.
2. Start every union by hand for several turns – it should turn freely. If it binds, stop and check the thread.
3. Hold the fitting with one spanner while you tighten each union with a split / flare nut spanner, so the fitting does not twist or load the pipes.
4. Clip the fitting or pipes securely so they cannot vibrate.
5. Bleed the brakes, then check every joint for leaks with the pedal pressed hard.

Safety: brakes are a safety-critical system. If you are not confident, have the work done or checked by a qualified mechanic.

Pack sizes

Available as 1, 2 or 5 T-pieces. Larger packs cost less per piece.

Delivery

Free UK delivery on every order (including Northern Ireland, Highlands & Islands). Same-day dispatch on orders placed before 10am.

Trusted by thousands of buyers on eBay

99.9% positive feedback from over 9,700 ratings, and 5.0 out of 5 for accurate description, postage cost, delivery time and communication (last 12 months). Read our eBay feedback.

FAQ

Will this fit copper (Kunifer) pipe? Yes – any 3/16″ (4.75mm) brake pipe: copper-nickel, copper or steel.

Is M10 x 1 the same as 3/8″ UNF? No. They are close in size (10mm against 9.5mm) but the threads are different and will bind. They are not interchangeable.

Why brass and not steel? Brass does not rust or seize, so fittings can be undone again years later.

Which unions do I need? Three male M10 x 1 unions – EMS-A2 (long) or EMS-A2s (short).

Is M10 x 1 the same as M10 x 1.25? No – for M10 x 1.25 (some Fiat and Lancia) see our EMS-A35 T-piece.

Need help? Message us with your vehicle and the part you are connecting to and we will confirm the right fitting before you order.