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Maytronics Dolphin Bottom Lid Assembly | 99919116

Maytronics SKU: 99919116

Maytronics Dolphin Bottom Lid Assembly | 99919116

Maytronics SKU: 99919116
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Maytronics 99919116 Bottom Lid Assembly with Support (Dolphin Robotic Pool Cleaner Replacement Part)

The Maytronics 99919116 is a genuine Dolphin robotic pool cleaner bottom lid assembly with support. It is commonly listed as a complete bottom lid assembly (D. Basic & Support) used on many Dolphin cleaner models, and it serves as the lower assembly where the filter bag/support components mount.

Key Features

  • Part number: 99919116
  • Brand: Maytronics (Dolphin genuine part)
  • Product type: Bottom lid assembly with supports
  • Common description: Bottom Lid Assy D. Basic & Support / Bottom Lid Assy and Rails
  • Function: Lower cover assembly for compatible Dolphin robotic pool cleaners
  • Commonly listed warranty: 1 year (listing/manufacturer dependent)

What This Part Does

  • Replaces a damaged, worn, or missing bottom lid assembly on compatible Dolphin cleaners
  • Provides the lower support structure for filter bag/cartridge-related components (model dependent)
  • Helps restore proper fitment and cleaner operation when the original lower assembly is cracked or broken
  • Maintains OEM fit and function when matched to the correct cleaner model

Common Compatibility Notes (Verify Before Ordering)

  • Used on many Maytronics Dolphin robotic pool cleaner models
  • Common retailer references include models in the DX3 / DX4 / M3 family and other legacy Dolphin variants (fitment varies by model/version)
  • Some listings identify this as the complete bottom lid assembly used where the bag attaches
  • Always verify your exact cleaner model and existing part number before ordering

Common Included / Assembly Notes

  • Often sold as a bottom lid assembly with supports/rails and related lower-lid hardware (exact included pieces may vary by seller listing)
  • Some listings describe it as replacing the bottom lid assembly and stainless supports
  • Verify whether your installation requires additional filter bag/base components that may be sold separately

Installation Notes

  • Disconnect the cleaner from the power supply before servicing.
  • Remove the old bottom lid assembly and inspect surrounding parts for wear or damage.
  • Transfer any reusable compatible components as needed, following your cleaner’s service instructions.
  • Confirm the lid assembly seats properly and opens/closes/functions correctly after installation.
  • Test cleaner operation and filter fitment before returning the unit to regular use.

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Maintenance Tips

  • Rinse the bottom lid area after each cleaning cycle to reduce debris buildup.
  • Inspect hinges, supports, and flap areas regularly for cracks or wear.
  • Keep filter components clean to reduce strain on the lower assembly.
  • Replace damaged lid assemblies promptly to maintain proper debris capture and cleaner performance.
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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