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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EZ-FLO 20405LF Brass In-Line Check Valve

Product ID: 389155834

Details

Brand
Eastman
Exterior finish
Brass Steel
Inlet connection size
1 Inches
Item dimensions L x W x H
18 x 36 x 38
Material
Brass

💧5 PSI min to open, 200 PSI max pressure

🔩1 in. IPS threaded inlet/outlet

🛡️Solid brass body for durability

Description

🚰 Lock in flawless flow with EZ-FLO’s brass check valve—because your system deserves the best!

BUILT TO LAST - Solid brass construction paired with a stainless steel spring ensures longevity
SEAMLESS INTEGRATION - 1-inch IPS threaded connections fit standard plumbing effortlessly
VERSATILE APPLICATION - Perfect for irrigation, pumps, and water lines—your go-to plumbing safeguard
PRESSURE READY PERFORMANCE - Opens at just 5 PSI and withstands up to 200 PSI working pressure
MAINTENANCE FREE RELIABILITY - Engineered for smooth, hassle-free operation with zero upkeep

The EZ-FLO 20405LF Brass In-Line Check Valve is a compact, durable plumbing component designed to prevent backflow in water systems. Featuring 1-inch IPS threaded female iron pipe connections, a solid brass body, and a stainless steel spring, it operates reliably between 5 PSI and 200 PSI. Ideal for irrigation, pump, and water line applications, this valve offers maintenance-free performance and compatibility with standard plumbing setups.

Specifications

ASIN	B00GZ3H3JW
ASIN	B00GZ3H3JW
Brand Name	Eastman
Connector Type	Threaded
Customer Reviews	4.6 4.6 out of 5 stars (816)
Customer reviews	4.6 4.6 out of 5 stars (816)
Date First Available	14 September 2014
Department	Home Improvement
Exterior Finish	Brass, Stainless Steel
Global Trade Identification Number	00091712423355
Included Components	valve
Inlet Connection Size	1 Inches
Inlet Connection Type	Female Iron Pipe
Item Dimensions	18 x 36 x 38 millimeters
Item Type Name	Brass In-Line Check Valve
Item model number	20405LF
Manufacturer	EZ-FLO
Manufacturer	EZ-FLO
Manufacturer Part Number	20405LF
Material Type	Brass
Maximum Pressure	200 Pound per Square Inch
Model Number	20405LF
Number of Items	1
Number of Pieces	1
Number of Ports	2
Outlet Connection Size	1 Inches
Outlet Connection Type	FIP
Product Dimensions	1.78 x 3.56 x 3.81 cm; 259 g
Size	1 in.
Specification Met	NSF, ANSI
Thread Type	FIP
UPC	091712423355
Unit Count	1 Count
Valve Type	check valve

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