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Maytronics Dolphin Diaphragm 2010, Pair | 9991046-ASSY

Maytronics SKU: 9991046-ASSY

Maytronics Dolphin Diaphragm 2010, Pair | 9991046-ASSY

Maytronics SKU: 9991046-ASSY
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Maytronics 9991046-ASSEMBLY Rapid Drain Flaps / Diaphragm Pair (Set of 2) for Dolphin Robotic Pool Cleaners | Genuine Replacement

The Maytronics 9991046-ASSEMBLY (also commonly listed as 9991046-ASSY) is a genuine Dolphin robotic pool cleaner replacement rapid drain flap kit, also described by many sellers as a diaphragm pair. This kit includes 2 flaps/diaphragms used in compatible Dolphin cleaners to help control water drainage and internal flow during operation and when lifting the cleaner from the pool.

Key Features

  • Part number: 9991046-ASSEMBLY / 9991046-ASSY
  • Brand: Maytronics (Dolphin genuine part)
  • Product type: Rapid drain flaps / diaphragm replacement kit
  • Quantity: Set of 2
  • OEM replacement part for compatible Dolphin robotic pool cleaners
  • Helps maintain proper drainage and cleaner handling performance

What This Part Does

  • Replaces worn, torn, or damaged rapid drain flaps / diaphragms
  • Helps water drain more efficiently when removing the cleaner from the pool
  • Supports proper internal water flow behavior in compatible cleaner housings
  • Helps restore normal cleaner performance when old flaps have hardened or failed

Common Compatibility Notes (Verify Before Ordering)

  • Commonly listed for select Maytronics Dolphin robotic cleaners in families such as M200/M400/M500, C3/C4, Nautilus CC Plus / Supreme, Triton Plus, Oasis Z5/Z5i, Sigma, and select Wave models (version dependent)
  • Retailer compatibility lists vary widely by model revision and regional naming
  • Always verify your exact cleaner model and existing part number before ordering

Important Notes

  • This item is commonly described using two names: rapid drain flaps and diaphragm pair.
  • The suffix may appear as -ASSY or -ASSEMBLY depending on the seller listing format.
  • Confirm whether your service job requires only the flap pair or additional housing/seal components.

Installation Notes

  • Disconnect the cleaner from the power supply before servicing.
  • Open the relevant housing area per your Dolphin service procedure and remove the worn flaps/diaphragms.
  • Install the new flaps in the same orientation as the originals.
  • Inspect surrounding plastic tabs, seats, and seals for wear while the cleaner is open.
  • Test cleaner operation and drainage behavior after reassembly.

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Maintenance Tips

  • Inspect drain flaps/diaphragms periodically if the cleaner feels unusually heavy when lifting from the pool.
  • Rinse the cleaner after use to reduce buildup that can stiffen or damage rubber components.
  • Replace worn flaps promptly to help maintain proper drainage and cleaner handling.
  • Check nearby seals and moving parts during service to prevent repeat disassembly later.
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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