Spears s1580-15f 1-1/2 in Fnpt Pvc Spring Check Valve

Product Description

The SPEARS s1580-15f is a utility spring check valve designed for inline flow control in piping systems that require positive shutoff and reliable backflow prevention. The valve features a PVC body with EPDM elastomer seating and a spring-assisted closing mechanism that prevents slamming under pressure differential. Rated at 150 psi for cold water service and 75 psi at elevated temperatures up to 140 degrees F, the s1580-15f is sized at 1-1/2 inches nominal with female NPT (FNPT) end connections. Inlet to outlet length is 5-5/8 inches. Licensed plumbers and irrigation contractors are the typical installers.

The s1580-15f is suited for residential and light commercial applications including landscape irrigation, pool and spa systems, aquaculture setups, and general-purpose OEM plumbing configurations. The spring-assisted design performs reliably in low-flow and intermittent-flow systems where a gravity-only swing check would be slow to respond. The compact body length makes it practical for tight installations where space between fittings is limited. Its maintenance-free, sealed construction reduces service intervals in demanding outdoor or wet environments.

Key Features

• Spring-assisted closing prevents backflow without valve slamming
• EPDM elastomer seat provides long service life across a wide temperature range
• PVC body rated for 150 psi cold water and 75 psi at elevated temperature service
• 1-1/2 in FNPT connections for direct threaded installation into standard IPS fittings
• Sealed, maintenance-free construction with no internal adjustment required
• Compact 5-5/8 in face-to-face length fits space-constrained installations

Compatibility

Designed as an OEM-style replacement or new-installation spring check valve for 1-1/2 inch IPS threaded piping systems in landscape irrigation, pool and spa, aquaculture, and general-purpose plumbing applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified irrigation technician. Shut off system pressure completely and drain the line before removing any existing valve or installing this unit. Thread engagement should follow standard NPT practice using appropriate thread sealant rated for PVC and potable or recirculated water service. Flow direction is marked on the valve body and must be observed during installation.

Technical Specifications

• Nominal Size: 1-1/2 inches
• End Connection: FNPT (Female NPT)
• Pressure Rating (Cold Water): 150 psi
• Pressure Rating (Elevated Temp): 75 psi
• Maximum Temperature: 140 degrees F
• Inlet to Outlet Length: 5-5/8 inches
• Body Material: PVC White
• Trim Material: EPDM
• Color: White
• Origin: Domestic

Standard Information

• Brand: SPEARS
• Manufacturer Part Number: s1580-15f