Skip to content

Aprilaire 4788 Maintenance Kit for Aprilaire 400 series Humidifiers

SKU 4788
Original price $189.00 - Original price $189.00
Original price
$189.00 - $189.00
Current price $189.00
in stock

The 4788 maintenance kit is designed to optimize the performance of your Aprilaire Humidifier Model: 400, 400A, 400M and is made in the USA. For optimal performance, the water panel should be replaced annually.

The 4788 Maintenance Kit includes:

  • Water Panel 45 (2 pack)
  • Scale Control Insert 4403
  • Water Distribution Tray 4407
  • Float Assembly 4406 includes 2 floats and the cover
  • Feed Tube and Compression Sleeve 4335
  • Orifice 4231
  • Inline Strainer 4004
  • Owner's Manual

    Delivery time / Order Processing & Shipping Times

    Rise ships manufacturer direct. We work hard so you receive your product(s) as quickly as possible. Learn more about our order processing & shipping times here.

    Carbon-neutral shipping with Shopify Planet
    Carbon-neutral shipping on all orders
    shipping emissions removed
    That's like...
    miles driven by an average gasoline-powered car
    We fund innovations in...
    Direct Air Capture
    Bio Oil


    • PERFECT APRILAIRE FIT Water panel dimensions: 10" H x 13" L x 1.75" W
    • FOR OPTIMAL PERFORMANCE replace water panel twice during the season

    Health Benefits


    Aprilaire Humidifiers can help you maintain optimal humidity in your home of 35% – 45% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites. In addition, you’ll feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditions

    Interested in Deals and New Products?

    Keep up-to-date on deals and new home building products that benefit your health, your wealth, and the planet delivered right to your inbox.

    Skip to content