Is this for 1 1/2" pipe or is it for a quantity of 1 for a 1/2" pipe?

1-1/2 inch IPS, not a quantity of one for 1/2 inch.

Can this be used with hose thread?

These are pipe thread which is slightly different from hose thread. However there are hose adapters out there to make the transition

Does the swing valve have a spring too or just free floating? Needed for lake pump but would be horizontal, so would it still work?

The swing check valve does have a spring, but should not be an issue for the application you have described.

This says it is threaded as fip...is this compatible with male npt threads?

Yes, FIP and NPT are interchangeable.

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EZ-Flo 3310844 20429LF Brass Swing Check Valve

EZ-Flo 3310844 20429LF Brass Swing Check Valve

Product ID: 623332221

Details

Brand
Eastman
Exterior finish
Brass
Inlet connection size
1.5 Inches
Inlet connection type
threaded
Item dimensions L x W x H
10.4 x 9.4 x
Material
Brass

🔩2" IPS Connection

🟡Durable Brass Body

🛡️125 PSI / 200 WOG Pressure Rating

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Rp4570476

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚰 Stop the Backflow, Start the Flow: The Brass Valve That Means Business

ROBUST BRASS CONSTRUCTION - Built to last with corrosion-resistant brass that stands up to daily wear and tear.
LEAD FREE SAFETY CERTIFIED - NSF, ASSE, UPC certified for potable water—safe for your home and environment.
VERSATILE PRESSURE HANDLING - Handles up to 125 PSI (200 WOG), perfect for residential and light commercial use.
RELIABLE BACKFLOW PREVENTION - Keep your water supply pure and uncontaminated with precision-engineered swing check action.
EASY INSTALLATION OPERATION - Designed for hassle-free setup and smooth, maintenance-free performance.

The EZ-FLO 20431LF Brass Swing Check Valve is a lead-free, brass-constructed valve designed to prevent backflow in potable water systems. With a 2" IPS connection and a pressure rating of 125 PSI (200 WOG), it ensures reliable, durable performance for residential and light commercial plumbing applications.

Specifications

ASIN	B00GZ3H8VK
Brand	Eastman
Customer Reviews	4.4 4.4 out of 5 stars (29)
Exterior Finish	Brass
Global Trade Identification Number	00091712423447
Inlet Connection Size	1.5 Inches
Inlet Connection Type	threaded
Item Dimensions	10.4 x 9.4 x 5.6 centimetres
Item Weight	386 g
Manufacturer	EZ-FLO
Material	Brass
Maximum Pressure	200 Pound per Square Inch
Model Number	20429LF
Number of Pieces	1
Number of Ports	1
Outlet Connection Size	1.5 Inches
Outlet Connection Type	FIP
Part Number	20429LF
Size	1-1/2 in.
Thread Size	1-1/2 inches
Thread Type	NPT
UPC	091712423447
Unit Count	1.0 count
Valve Type	Check Valve

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