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Pentair 2" x 4", 3-Bar Frame & Grate, White | 542038

Pentair SKU: 542038

Pentair 2" x 4", 3-Bar Frame & Grate, White | 542038

Pentair SKU: 542038
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Pentair Admiral Skimmer Weir Door (Replacement Flapper) | 542038

The Pentair 542038 is a replacement skimmer weir door (flapper) used in select Pentair/American Admiral™ pool and spa skimmers. The weir door pivots at the skimmer throat to help maintain a steady surface draw, improving skimming performance by allowing debris to enter while reducing the chance it floats back out when the pump cycles off.

Key Features

  • Improves surface skimming: helps pull leaves and debris into the skimmer for capture in the basket.
  • Helps prevent debris blow-back: reduces debris drifting back into the pool when circulation stops.
  • Direct replacement flapper for compatible Admiral skimmer throats.
  • Simple, tool-light install (snap/pin style depending on skimmer revision).

Compatibility

  • Fits: Pentair/American Admiral™ skimmers that specify part 542038
  • Common application: Admiral S20 skimmer assemblies (verify by your parts diagram)
  • Tip: Measure your existing weir and confirm the hinge/pin style before ordering, as some skimmer revisions use different weir sizes.

Specifications

  • Brand: Pentair
  • Part Number: 542038
  • Part Type: Skimmer weir door / flapper
  • Material: UV- and chemical-resistant plastic (typical for skimmer weirs)
  • Color: White (most common)
  • Quantity: Sold individually

Common Signs You Need a New Weir

  • Weir is cracked, warped, or missing
  • Door sticks open/closed and doesn’t swing freely
  • Debris floats back out of the skimmer when the pump shuts off
  • Reduced surface skimming even with a clean basket and proper water level

Installation Notes

  • Turn off the pump before servicing the skimmer.
  • Remove the skimmer lid and basket, then access the throat area.
  • Install the new weir on the hinge points/pins and confirm it swings freely.
  • Verify the pool water level is appropriate (typically mid-skimmer opening) for best skimming performance.

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Maintenance Tips

  • Keep the skimmer basket clean—restricted flow reduces skimming action and circulation.
  • Maintain the proper water level for best performance; low water reduces skimming and can pull air into the system.
  • If the weir repeatedly warps or sticks, verify the skimmer throat isn’t being exposed to extreme heat or chemical concentration.
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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