Bronze tee, female NPT thread on all three ports — class 125 (B101)
TECTUL · Dispatch across Colombia · Exports to Central & South America
Tee in cast brass bronze with female NPT thread on all three ports (straight run equal to the branch), for branching a low-pressure water or compressed-air line without reducing the conveyance diameter. Shares material, thread standard and pressure rating with the rest of the class 125 threaded bronze line.
IMPORTANT: reference data — may differ from the physical product; verify with an advisor before buying.
SKU VT-RAC-B101 (B101 bronze tee) · 1/8″ and 1/4″ with dimensional sheet; TECTUL catalog up to 1/2″ · sold by the unit
1. Technical specifications
Dimensions by diameter
| NPT size | A (overall length) [mm] | B (branch height) [mm] | Weight [g] |
|---|---|---|---|
| 1/8″ | Confirmed on quotation | 32 | |
| 1/4″ | 38.0 | 25.0 | 57 |
| 3/8″ and 1/2″ (TECTUL catalog) | No manufacturer dimensional sheet — confirmed on quotation | ||
IMPORTANT
This technical data sheet is a reference guide to the properties of this product type; it is not a quality certificate for the product you are buying. The measurements, dimensions and physical or geometric characteristics of the product supplied may vary by manufacturer, heat and lot, and may even fall outside the cited standards. If any of these figures is critical to your design or build, verify it with one of our advisors against the physical product or the lot's mill certificate, so you can be fully certain of what you are buying. · Original data sheet: tectul.com/en/conduccion-de-fluidos/racores-y-acoples/ficha-tecnica-b101-tee-bronce.html
Only unambiguously legible values from the manufacturer's source table are published (March 2022 revision).
General specifications
| Product | Bronze tee, female NPT thread on all three ports |
| Material | Cast brass bronze |
| Thread | NPT per ANSI/ASME B1.20.1 |
| Pressure rating | Class 125 (ASME B16.15): 200 psi (13.8 bar) ≤66 °C with water/oil/non-flammable gas · 125 psi saturated steam |
| Commercial range | 1/8″ and 1/4″ with manufacturer dimensional sheet; TECTUL catalog up to 1/2″ |
| Applicable standards | ASME B16.15 · ANSI/ASME B1.20.1 |
2. Engineering calculations: pressure drop when branching
- Starting figure: a branch-flow tee typically introduces a loss coefficient K≈1.0–1.5 at the side outlet, versus K≈0.2–0.3 through the straight run (reference values from piping hydraulics handbooks such as Crane TP-410, for standard threaded tees).
- Practical reading: if the main flow splits through the side branch, the head loss on that path can be 4–5 times greater than if the flow continues through the tee's straight run.
- Design consequence: on lines where pressure drop is critical (instrumentation compressed air, long runs), prefer branching through the straight run rather than the side branch when the design allows it.
The cited K coefficients are reference values from hydraulics literature, not from this fitting's manufacturer; calculating the actual head loss of a specific system requires flow rate, fluid viscosity and the exact internal diameter of the installed part.
3. Frequently asked questions
Does the B101 tee reduce diameter at the branch?
No, per the available manufacturer sheet the straight run and the branch share the same NPT thread (no reduction); if you need a smaller-diameter branch, use a reducing bushing at that port or check whether a reducing tee reference exists.
Is it suitable for potable water?
Bronze is a traditional potable-water material, but the available manufacturer sheet does not declare a specific NSF/ANSI 61 certification; if the application requires it, confirm with the supplier before specifying.
Why does the 1/8″ size not show A and B?
The manufacturer's source table does not print those two values legibly for that size; it only confirms the weight (32 g). Exact values are confirmed on quotation.
4. Application notes
Feasibility
Suitable for branching water, compressed air and low-pressure oil lines without a diameter change. Do not specify for certified potable water without first confirming NSF/ANSI 61 or equivalent conformance with the supplier.
Installation
Seal all three threads with PTFE tape or a fluid-compatible sealant. Always hold the tee's hex/cylindrical body when tightening each end, never the adjacent pipe. Install with the branch oriented per the piping drawing to minimize additional elbows.
Design
Use 200 psi (13.8 bar) only cold (≤66 °C); for steam, 125 psi. For lines with critical pressure drop, account for the branch's higher loss coefficient versus the straight run when sizing the system. Confirm exact dimensions of the 1/8″ and the 3/8″/1/2″ sizes before detailing tight installation drawings.
5. Technical notice and limitation of liability
The pressures, dimensions, weights and other characteristics in this sheet are theoretical calculation values obtained from nominal properties published in the standards cited (ASME B36.10-2022, ASME B31.3-2024, ASTM A106/A106M-19a, ASTM A53/A53M-24, API Spec 5L 46th ed.). They guide selection; they are not a certificate of conformity for any given lot.
The actual behavior of each lot varies with manufacturing — wall tolerance (up to −12.5%), out-of-roundness, residual stresses — and with the raw material — chemical composition within the ranges the standard allows, heat-to-heat differences. To certify a lot, the tests defined by its product standard are required: tensile test, flattening test and hydrostatic test, documented in the manufacturer's mill test certificate (MTC), which TECTUL supplies upon request; testing of the lot in an independent laboratory can also be arranged.
These values must not be used as the sole criterion in critical or safety applications, or wherever failure of the line may compromise people, property or the environment: in such cases the design belongs to the project's responsible engineer under the applicable code (ASME B31.3, B31.1 or the one governing the installation), with the design temperature, corrosion allowance and load cases of the actual service. Before deciding with these data, consult our technical team.
Sources
- ASME B16.15-2020 — Cast Bronze Threaded Fittings: Classes 125 and 250
- ANSI/ASME B1.20.1-2013 (R2018) — Pipe Threads, General Purpose, Inch (rosca NPT)
- Ficha de fabricante "B101 - Tee Roscada" (catálogo de accesorios roscados de bronce, IMR/TECTUL, revisión marzo 2022): A, B y peso para 1/4″; peso para 1/8″
- Crane Co. — Flow of Fluids Through Valves, Fittings, and Pipe (TP-410): coeficientes K de referencia para tees estándar roscadas, paso recto vs. rama
This data sheet is the property of TECTUL, part of the Industrias IMR group. Reproduction without attribution is prohibited. Original document and updates: tectul.com/en/conduccion-de-fluidos/racores-y-acoples/ficha-tecnica-b101-tee-bronce.