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White injection-molded PVC 3 in x 4 in male reducing adapter (MPT x slip), Schedule 40, front angle on white background

LASCO 3" x 4" PVC Male Reducing Adapter (MPT x Slip) - 436341

Brand: PVC
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$19.59
$14.69
SKU 436341

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The LASCO 436-341 3" x 4" PVC male reducing adapter provides a reliable transition between a 3" male NPT threaded connection and a 4" slip/socket plain end. Manufactured to Schedule 40 dimensions, this reducer is injection-molded from durable PVC for use in irrigation, pool, and potable water systems.

  • Material & rating: Injection-molded PVC, Schedule 40; typical temperature range up to 140°F and maximum operating pressure around 260 psi (varies by application).
  • Connections: 3" male NPT (MPT/MNPT) x 4" slip/socket — fits standard IPS Schedule 40 piping.
  • Certifications: Listed with NSF 14 and NSF 61 on manufacturer and distributor listings (suitable for potable water and pool applications).
  • Dimensions & part number: Overall length approximately 3.95" (per distributor specs); manufacturer part number 436-341 (SKU 436341).
  • Installation: Use compatible thread sealant or tape on NPT threads; hand-start threads then wrench to seat. Seals not included; avoid overtightening.

For best results confirm pipe schedule and thread type before installation. Refer to the manufacturer's technical sheet for detailed pressure/temperature curves and compatibility notes when designing systems or performing repairs.

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Frequently Asked Questions

What material and schedule is this reducing adapter?
Injection-molded PVC manufactured to Schedule 40 dimensions for use with Schedule 40 piping.
What connection types and sizes does it have?
3" male NPT (MPT/MNPT) on the small end and a 4" slip/socket on the large end for IPS piping.
What temperature and pressure ratings apply?
Typical operating range up to 140°F with maximum working pressures around 260 psi; consult the manufacturer's datasheet for exact curves.