Drain Cocks
The Drain Cocks manufacture!
Zhejiang Yijia Hydraulic Machinery Co., Ltd. is an industry and trade company for hardware production in China founded in 2013. The company focuses on brass fittings and customized precision parts.
Why choose us
Production Equipment
Equipped with 100 sets of full machine tools, 60 sets of semi-automatic CNC machines, 5 sets of inspection equipment.
Our Certificate
Yijia Machinery has passed IATF 16949:2016 system certification,ISO 9001 & ISO 14001 system certification,DOT, AMECA product certification.
OEM
You can find all the OEM numbers you are looking for on our product detail pages.
Product Application
Specialized in customized brass fittings, products meet SAE, DOT, ASTM standards, threads have NPTFNPTUNS UNEF BSPT, etc., brass material C36000, lead-free copper.
|
Part# |
Male Pipe |
Dustry Numb |
A |
Hex |
PARKER |
MAF |
GATES |
Tectran |
Fairview |
|
XJ56084* |
1/4 |
6788 |
1.56 |
0.56 |
DC606-4 |
46084* |
G33831-0004 |
239-B |
239-B |
Functions

Efficient drainage
Quickly release the accumulated water, oil, and particulate matter at the bottom of the gas storage tank to prevent freezing and blockage of the gas path in winter.
Suitable for key components such as air dryers, air storage tanks, brake valves, etc.

High pressure sealing performance
Metal cone seal (or O-ring assist) ensures no leakage at 123 PSI pressure.
Certified by DOT FMVSS 121, the burst pressure is ≥ 360 PSI (2.5 times the working pressure).

Corrosion resistance and long lifespan
Brass+nickel plating treatment, resistant to salt spray and deicing agent corrosion, suitable for harsh environments such as cold chain logistics and mining vehicles. Supports 10000+cycles of opening and closing, with a long maintenance cycle.

Security Design
Anti misoperation structure: Some models come with locking covers to prevent accidental opening and air pressure leakage.
Pull rope version: Can be operated from the outside of the vehicle chassis without drilling into the bottom of the vehicle for drainage.
Order Process
Inquiry---Provide us all clear requirements(total qty and package details).
1
>>
Quotation---Official quotation form with all clear specifications from our professional team.
2
>>
Making Sample - Confirm all quotation details and the final sample.
3
>>
Payment Terms---T/T 30% deposit before production, 70% balance against copy of BOL
4
>>
Production---Mass production.
5
>>
Shipping-- By sea or by air or by railway.
6
Installation steps
Check the drainage outlet of the gas storage tank to ensure that the interface is clean and free of impurities.
Screw in the Lever Handle drain valve to ensure thread alignment and avoid damaging the interface.
Use sealing tape or sealant to ensure no air leakage after installation.
Manually test the lever operation to ensure smooth opening and closing.
Packaging & Shipping

Our factory
Yijia Hydraulic Machinery adopts full CNC machining, with a workshop area of 3600 square meters, equipped with 100 sets of full machine tools, 60 sets of semi-automatic CNC machines, and 5 sets of inspection equipment.We have an annual production capacity of 3 million sets of brass fittings and air brake hose assemblies.







