Street or Service Tee (Reducing) – Male × Female Cast Iron Tee

By Nico Yin · Qingdao Zhaoyuqi Machinery Co., Ltd.

Overview

A street tee — also called a service tee in plumbing practice — is a reducing tee in which one run end carries male threads instead of the usual female threads. This male × female arrangement lets the fitting screw directly into a valve, meter, tank boss or threaded equipment port without an intervening nipple, saving one joint, one component and installation time in tight service connections. The second run end and the 90° branch are standard female threaded outlets, usually one or more sizes smaller than the male run, so a smaller service line can be tapped off a main with a single fitting.

Our street reducing tees are resin sand cast in ductile iron to ASTM A536 (65-45-12 / 80-55-06) and EN-GJS-400-15 / -450-10 / -500-7, then machined and thread-gauged. Typical sizes span 1"×½" up to 4"×2" with NPT (ASME B1.20.1) or BSP (ISO 228) threads. They serve water service lines, gas distribution laterals, meter and regulator connections, irrigation take-offs and fire service connections where ductile iron's higher strength relative to grey cast iron improves resistance to installation stress and ground movement. Bare, hot-dip galvanized and epoxy-coated finishes are all produced in-house.

Specifications

Customization & Sampling

Street tees are a classic pattern-shop item: we can vary which end is male, adjust reduction ratios, change thread standard between NPT and BSP on the same drawing, or add hex flats for wrenching. Samples with full dimensional and thread-gauge reports are provided before batch production; typical sampling lead time is 15–20 days with existing patterns.

Quality Inspection & Packaging

Per-batch checks include melt chemistry, tensile and hardness coupons per ASTM A536, NPT/BSP gauge verification on male and female threads, and dimensional audit to ISO 8062. Quality management conforms to ISO 9001:2015 requirements. Small fittings are bag-counted and cartoned, then palletized; export cartons are labeled with size, thread and coating for easy dock checks.

FAQ

Q1: What is the difference between a street tee and a regular reducing tee?

A regular reducing tee has female threads on all three ends. A street tee replaces one run end with a male thread, so it can be screwed directly into a valve, meter or fitting — no nipple needed, one fewer leak path.

Q2: Which end should be male in my application?

The end that connects directly to equipment or to another female-threaded component. We can put the male thread on either run end, and the male size can equal or differ from the female end — just send the connection schedule.

Q3: Why "service" tee — is it only for utility service lines?

The name comes from water/gas service connections, but the fitting is used anywhere a branch must be reduced and connected directly into equipment: metering skids, irrigation valves, compressor take-offs and fire service hook-ups.

Related Products

• 45° Street Elbow

• Reducing Tee

• Reducing Coupling

• Coupling with EG Gasket

• Threaded Union

Get a Quote

Tell us the male × female × branch combination and thread standard — drawings-based quotes within 24 hours. WhatsApp: +86 185 6156 7088. Cast, machined and coated in our own factory with MOQ-friendly trial quantities.

Need a formal quotation? Send your Street or Service Tee (Reducing) drawing, quantity and target price through our RFQ form — it goes straight to the foundry inbox, and we reply with a priced offer, material certificate draft and production lead time within one business day.