NPTLOK Reducing Union Tee
Reducing union tee is a kind of double ferrule tube fitting. It is used to connect tubing or pipe with three ends of connections. One branch connection size has a different diameter from the other connections. Reducing union tee is particularly useful when smaller branch lines are integrated into larger piping systems. It allows for smooth transitions between different sizes and keeps a secure and leak-proof connection. Reducing union tee can be used in managing fluid or gas flow.
The reducing union tee designed by NPTLOK is easy to tighten, which can improve your installation time.
Material: stainless steel, carbon steel, brass, or special materials including Monel, Super duplex.
Size: 1/8”-1” (3mm-25.4mm)
Pressure: 3000psi-10000psi
- Reducing Union Tee Datasheet

Reducing Union Tee Is Easy To Be Tightened
When installing a double ferrule fitting onto a tube, it is usually tightened 1 1/4 turns. Your worker may find it very difficult to tighten the whole 1 1/4 turns, which will delay the assembly time and your project delivery time. NPTLOK reducing union tee is very easy to tighten.
NPTLOK double ferrules, body, and the nut of the union tee are all improved for easy tightening. Your work will be easy to tighten it even the space is limit. It will make your delivery time quicker.
Reducing Union Tee Double Ferrules Sealing
Normally, the reducing union tee has double ferrules for sealing. Double ferrules can withstand high pressure from 3000psi to 100000psi. Double ferrule sealing can prevent leakage.
When you tighten the reducing union tee onto the tube, you can see two deep circles of a front ferrule and a back ferrule inside the tube, which indicates that the NPTLOK double ferrule sealing is very tight.


Reducing Union Tee Hardening Treatment
NPTLOK makes the hardening treatment inside the body of the reducing union tee to keep the taper consistent with the ferrules, by which way, the reducing union tee can withstand the higher pressure and prevent leakage.
It is also helpful to tighten the reducing union tee easily.
Reducing Union Tee Bar Stock Body Or Forged Body
NPTLOK often offers the reduced union tee in the forged body. A forged body can withstand higher pressure than a bar stock body.
For stainless steel 304 or 316 and regular sizes of reducing union tee, including 1/8”, 1/4”, 3/8”, 1/2”, 3/4”, there are mature molds for them. They do not need to be machined in the lathes, and save much time for production.
Because of the mature molds, the precision and dimension of the reducing union tee are stable.
If you require a smaller quantity and a special material reducing union tee, the mold cost is very high. It is better to use a bar stock body machined in the lathe.
Bar stock body is flexible for special materials and non-standard sizes for reducing the union tee.

Normally, we use the bubble bag to pack the reducing union tee, then put them in the carton box. If the quantity is larger, we will use the wooden box to pack all the products.
Yes, we can offer a Material Test Certificate (MTC) for reducing union tee, including heat number, chemical composition, mechanical properties, and more.
Yes, we can offer a pressure test of the reducing union tee.
Yes, if you require the third-party inspector to check the quality of the reducing union tee before delivery, it is no problem for us. We will follow their instructions.
Yes, you can print your logo on the reducing union tee without extra cost.
Yes, our factory can manufacture reducing union tees in special materials, including Monel, Alloy, and Super Duplex, among others.
1 year
Yes, besides reducing union tee, our factory also offers stainless steel seamless tubing.



















