The Lasco 1" MPT x 3/4" FPT Schedule 40 PVC Reducer (439-131) is a replacement plumbing fitting for compatible pool, spa, bath, and equipment plumbing systems. This style of fitting is used to join, reduce, cap, redirect, or service PVC/CPVC plumbing runs where the existing installation requires the same connection type and size.Use this part when replacing a cracked, leaking, damaged, or incorrectly sized fitting during equipment service. Confirm slip, spigot, MPT, FPT, schedule, material, and dimensional requirements before installation. Replacement PVC/CPVC plumbing fitting Designed for matching pool, spa, or bath equipment plumbing connections Helpful for repair, rebuild, or equipment pad service work Compare all connection sizes and thread types before ordering Verify part number 439-131 before purchase