Photo of Airmax KoiAir 2 Diaphragm Assembly Set
Photo of Airmax KoiAir 2 Diaphragm Assembly Set
Photo of Airmax KoiAir 2 Diaphragm Assembly Set
Photo of Airmax KoiAir 2 Diaphragm Assembly Set
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Airmax KoiAir 2 Diaphragm Assembly Set

  • SKU: AM-510146
  • Brand: Airmax
  • Type: Replacement Parts
  • Barcode: 811262013987
$39.99
$49.99
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Ships in 2–14 business days, depending on availability.

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Photo of Airmax KoiAir 2 Diaphragm Assembly Set
Airmax KoiAir 2 Diaphragm Assembly Set
$39.99
$49.99

The KoiAir 2 Diaphragm Assembly Set is designed to restore proper airflow and performance in koi pond aeration systems as internal components wear over time. Diaphragms are a critical moving part in diaphragm-style compressors, and gradual wear can lead to reduced oxygen output.

This replacement set allows you to bring the aeration system back to peak performance without replacing the entire compressor. It is an essential maintenance component for maintaining healthy oxygen levels in large water gardens and koi ponds.

Why Choose the KoiAir 2 Diaphragm Assembly Set?

  • Restores Airflow: Replaces worn diaphragms that reduce oxygen delivery.
  • Targeted Fit: Designed specifically for the KoiAir 2 aeration system.
  • Maintains Pond Health: Supports consistent oxygen levels for koi and beneficial bacteria.
  • Cost-Effective Maintenance: Extends compressor life without full replacement.
  • Routine Service Part: Ideal for scheduled maintenance or when airflow drops.

PRO TIP

If diffuser bubbles become weaker or uneven across the pond, inspect and replace diaphragm assemblies before adjusting airlines or diffuser placement. Worn diaphragms are a common cause of gradual airflow loss.

  • Product Type: Diaphragm assembly set
  • Compatible System: KoiAir 2 aeration system
  • Function: Restores compressor airflow
  • Application: Koi ponds and large water gardens
  • Maintenance Type: Internal compressor rebuild component

Shipping Information

We aim to get your pond and water garden supplies to you as quickly as possible.

  • Orders over $250 ship free across North America.
  • A flat rate of $14.99 applies to all smaller orders.
  • Standard delivery takes 1 to 4 business days.
  • Most in-stock items are dispatched within 24 hours.
  • Special order items may require 2 to 14 business days before shipping, depending on availability.
Returns & Exchanges

If something isn’t quite right, we’ve got you covered.

  • Returns are accepted within 30 days of delivery.
  • Items must be unused, in original packaging, and include all parts and proof of purchase.
  • All returns require prior authorization. Items sent without approval will not be accepted.
  • Shipping costs are non-refundable unless the item is confirmed defective upon delivery.
  • Items marked as Clearance, Special Order, or Final Sale are non-returnable and cannot be cancelled, returned, or refunded.

For full details, please review our Shipping Policy and Refund Policy.

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