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White CPVC inline ball valve with tee handle and socket FNPT connections

Spears

Spears 3639-015C 1-1/2 in CPVC Ball Valve Socket x FNPT Inline 235 psi

SKU CH-XPH9-GTGNT

Controls flow in 1-1/2 inch CPVC piping with a 235 psi inline ball valve featuring Safe-T-Shear stem and FKM seals

  • TypeOther
  • CPVC body resists corrosion in hot and cold water lines
  • 235 psi pressure rating handles demanding residential and commercial plumbing
  • Safe-T-Shear stem protects against stem blow-out under pressure
  • FKM seats and seals deliver reliable chemical and temperature resistance
  • Tee handle in polypropylene gives secure grip for easy operation

CPVC Ball Valve for Piping Systems

The Spears 3639-015C is a 3-piece inline ball valve built from CPVC with a standard port design. It connects a 1-1/2 in socket end to an FNPT thread, making it suitable for joining solvent-weld and threaded pipe runs in residential or light-commercial plumbing installations.

Pressure Rating and Temperature Range

Rated at 235 psi CWP, the valve handles cold-water working pressures within that limit. Operating temperature spans 32 to 190 degrees F, so it remains functional across typical potable-water and process-fluid conditions. The Safe-T-Shear stem design helps protect the sealing assembly from over-torque damage during operation.

Upgrading from Worn or Incompatible Valves

This unit replaces older quarter-turn valves that leak at the stem or body seal, or that lack the chemical resistance of CPVC and FKM materials. The jump is worth it when the existing valve cannot withstand the 235 psi rating, the 190 degree F upper temperature, or the aggressive fluids that attack standard elastomers. It is not for systems requiring a full-port flow path or larger pipe diameters.

Highlights

  • CPVC body resists corrosion in hot and cold water lines
  • 235 psi pressure rating handles demanding residential and commercial plumbing
  • Safe-T-Shear stem protects against stem blow-out under pressure
  • FKM seats and seals deliver reliable chemical and temperature resistance
  • Tee handle in polypropylene gives secure grip for easy operation

Specifications

BrandSPEARS
TypeOther

Questions about this item

How do I install the 3639-015C valve and what step is often missed?

Clean and dry both the 1-1/2 in CPVC socket and the FNPT threads, apply CPVC solvent cement to the socket only, then thread the FNPT side with PTFE tape; the step often missed is allowing the solvent-cemented joint to cure fully before pressurising to 235 psi CWP.

What maintenance or replacement will the 3639-015C need over time?

The FKM seats and body seals may require replacement if chemical attack or temperature cycling above 190 Degrees F occurs; the Safe-T-Shear stem is designed to shear before the body fails, so a sheared stem must be replaced with the correct PVC stem kit.

What limit appears first on the 3639-015C during sustained high-temperature use?

The temperature ceiling of 190 Degrees F is reached before the 235 psi CWP pressure rating becomes the limiting factor, so prolonged service near 190 Degrees F will dictate the valve's usable life.

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