Es para uso horizontal o vertical?

In-line check valves can be installed horizontally or vertically.

What is the threading if i wanted to attach brass connectors to either side?

Thank you for your question on the Brass In-Line. The threading is 1/2" FIP.

Will this work with oil?

Can't say for sure, but I would say it depends on things like whether the oil is clean and how hot the oil is. I would think that it would work with clean, ambient temperature oil, but that does not take into account what the seals are made of and what kind of oil you're talking about. Some oils will degrade the seals. Not much help, but something to think about.

Max water temp and is the spring inside stainless steel?

In the industrial world, low temp is 180f or less, High temp is 181- Steam, so when someone says low temp, you can use this idem. I personally have used them on my boiler returns without a problem, just make sure you at 5ft of head for your circulator pump,

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Description

🚰 Lock in flawless flow—never worry about backflow again!

BUILT TO LAST - Heavy-duty brass construction ensures corrosion resistance and longevity
VERSATILE APPLICATION - Ideal for irrigation, pumps, and water lines—professional-grade plumbing essential
SEAMLESS COMPATIBILITY - 1/2 inch IPS threaded inlet/outlet fits standard plumbing effortlessly
MAINTENANCE FREE RELIABILITY - Engineered for smooth, hassle-free operation—set it and forget it
PRESSURE PERFECT PERFORMANCE - Opens at just 5 PSI, handles up to 200 PSI working pressure with ease

The Eastman Brass In-Line Check Valve is a compact, durable plumbing solution featuring 1/2 inch IPS threaded connections and a stainless steel spring. Designed to prevent backflow, it operates reliably between 5 and 200 PSI, making it perfect for irrigation, pump, and water line systems. Built with a solid brass body for corrosion resistance and maintenance-free use, this valve meets NSF and ANSI standards for professional-grade performance.

Specifications

Material	Stainless Steel
Brand	Eastman
Item dimensions L x W x H	1.8 x 1.25 x 1.25 inches
Exterior Finish	Stainless Steel,Brass
Inlet Connection Size	0.5 Inches
Inlet Connection Type	Threaded
Outlet Connection Type	MNPT
Maximum Operating Pressure	2E+2 Pound per Square Inch
Number of Ports	2
Outlet Connection Size	0.5 Inches
Specification Met	NSF, ANSI
Global Trade Identification Number	00091712423294
Manufacturer	EZ-FLO
UPC	091712423294
Part Number	20401LF
Item Weight	4.2 ounces
Product Dimensions	1.8 x 1.25 x 1.25 inches
Item model number	20401LF
Size	1/2 in.
Color	Brass
Style	Brass In-Line Check Valve
Item Package Quantity	1
Measurement System	inch
Included Components	valve
Batteries Included?	No
Batteries Required?	No

Reviews

R**L

Good Product

Good product. Worked great.

4.07.2025

B**E

Works great!

Stopped water hammer on my washing machine.

27.05.2025

W**P

Great Value

Perfect replacement for a failed check valve on our home well. Now, several months later, it's still working as intended. Great value, easy to install.

22.04.2025

R**Y

meets your needs

Fit my requirements. Not sure if it leaks water in a back flow or not. Seems to work okay.

4.08.2022

D**S

Works well.

Works well to keep water flowing in the right direction.

4.04.2025

M**

Good Brass Check

These threads were correct and these worked well for separating two alternating light pressure lines. i actually pulled the spring out of one of them because of the low line pressure coming in to that check to help the pump out. it works well because the disc inside floats easily and seals.

15.11.2024

O**Z

Works exactly as described

Great item, works flawlessly, easy install, lead free material

12.11.2024

B**

worked good

28.11.2024

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