Pentair 2" x 4", 3-Bar Frame & Grate, White | 542038
Pentair
SKU: 542038
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.
Related Products
- Search Aqua Pool Supply for 542038
- Admiral S20 Skimmer Basket (85014500)
- Admiral S20 Lock-Down Lid (85007400)
- Admiral Float Valve / Equalizer Assembly (85015200)
- Admiral S20 skimmers & parts
- Skimmer lids
- Skimmer baskets
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: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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