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Coupling, 3" Slip White PVC Schedule 40 | 429-030

Lasco SKU: 429030
Lasco Coupling, 3" Slip White PVC Schedule 40 | 429 - 030 - Plumbing - img - 1

Coupling, 3" Slip White PVC Schedule 40 | 429-030

Lasco SKU: 429030
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 429030 (429-030) Schedule 40 PVC Coupling – 3" Slip x Slip  – White

The Lasco 429030 is a Schedule 40 PVC straight coupling used to join two pieces of 3" PVC pipe in a solvent-weld (glue) system. Both ends are 3" slip (socket) connections, making it a common repair and plumbing fitting for pool/spa equipment pads, return/suction lines, water features, and irrigation systems.

Key Features

  • Part Number: 429030 (often shown as 429-030)
  • Type: PVC Coupling (straight)
  • Size: 3" (IPS)
  • Connections: 3" Slip (socket) x 3" Slip (socket)
  • Material: Schedule 40 PVC
  • Color: White
  • Use: Joins two 3" PVC pipes in a straight run

Common Applications

  • Repairing cracked or cut sections of 3" pool/spa plumbing
  • Extending a 3" line on an equipment pad
  • Building 3" manifolds and straight-run connections for water circulation systems
  • General-purpose 3" PVC plumbing (irrigation and water transfer)

Installation Notes

  • Slip ends are solvent-weld: Use PVC primer and a PVC cement rated for pressure plumbing.
  • Dry-fit first: Confirm alignment and spacing before gluing (3" fittings set quickly once cement is applied).
  • Full insertion: Mark insertion depth and seat pipe fully into the socket while cement is wet.
  • Support the pipe: Reduce stress on the coupling with proper pipe supports to help prevent future cracking.
  • Cure time: Allow proper cure time before pressurizing (varies by cement type, temperature, and humidity).

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Installation & Maintenance Tips

  • Deburr and chamfer pipe ends before gluing to reduce the chance of wiping cement out of the joint during assembly.
  • Keep sockets and pipe ends clean and dry—dirt and moisture can weaken solvent-weld joints.
  • Avoid forcing misaligned plumbing into place; pipe strain is a common cause of hairline cracks over time.
  • After startup, inspect joints for seepage and address alignment/support issues immediately.
  • If you anticipate future equipment removal, consider adding a union nearby instead of relying on a glued coupling.
Questions about returns? View our return policy.

Hours Of Operation:

Monday - Friday: 7:00 am to 5:00 pm Phoenix Time

Saturday: 8:00 am to 2:00 pm

Sunday: Closed

  • We do not ship on Saturday or Sunday.
  • Orders totaling more than $300 will require signature confirmation upon delivery.
  • We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
  • Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
  • Expedited shipping options are available at checkout.

Return Policy:

  • Products that are received damaged will receive a refund in store credit.
  • Most products are eligible for return within 30 days of receipt, except where noted below.
  • To initiate a return, please complete an RMA form prior to sending your item back.
  • Original shipping costs are non-refundable and will be deducted from the return credit.
  • Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
  • Some returns will be charged an automatic 15% restocking fee.
  • We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
  • Please complete the return form to receive your RMA number and return shipping label.
  • Chemical products are not eligible for return under any circumstances.
  • The Pentair Colorsync 618031 is not eligible for return.
  • Pool cleaners are not eligible for return.
  • Opened seals and o-rings are not eligible for return.
  • Capacitors are not eligible for return.
  • Plastic popup tools are not eligible for return.
  • Automation components and circuit boards are not eligible for return.
  • If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
  • Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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