Classic 3500 Series Heavy-Duty Sleeper Sofa Mechanism with WetBan Mattress

Replace damaged, rusted, worn-out, or unsafe sleeper units with a new Made-in-USA Replacement Sleeper Sofa Mechanism which features squared tubular construction that's safe, strong, well designed. When sleeper sofa mechanisms break, they can become uncomfortable, non-working, or worse, dangerous.  Wallace Flynn offers many different replacement sleeper sofa mechanisms. Repair it, don't replace it. 

If you're unsure, please contact us before ordering to ensure proper sizing. 

The strongest sleeper mechanism made, the Classic 3500 Series contract sofa sleeper system features an engineered low-profile linkage to keep all metal parts below the mattress line. Its all-squared tubular frame construction provides improved safety and comfort in the seated position. The Classic 3500 Series from Wallace Flynn is a series of sofa sleeper mechanisms engineered with low-profile linkage to keep all metal parts below the mattress line. These mechanisms are easy to operate, and their all-squared tubular frame construction provides a smooth and visually appealing look. The Classic 3500 Series offers improved safety by eliminating pinch points, and the comfort in the seated position has been enhanced as well.

When ordering a replacement mechanism for your sofa, finding the manufacturer and model number information for the existing mechanism is very important. This ensures that you receive the correct fit for replacement. This model replaces the Leggett and Platt 3500 Classic Series mechanisms. Alternately, if the label is difficult to read, you can measure the distance between the brackets where the unit mounts into the wooden frame inside the sofa. 

Please look for the Leggett model number sticker on your current mechanism and match it to the model number below. The model number of your current mechanism is the only accurate way to ensure a correct replacement. Please reference the chart below to find your model number. Please contact us before ordering to ensure proper sizing. All sleeper mechanisms are made in the USA.

Available in the Following Widths:
Size - Model
44" - 3544, 4435
48" - 3548, 4835
55" - 3555, 5535
60" - 3560, 6035
68" - 3568, 6835

WET BAN™ Ultra Smart Mattress™ technology with silver ion-based antimicrobial technology is now available in both Sleeper Sofa and regular luxury mattresses. 

Our EXCLUSIVE WET BAN mattresses are the perfect solution for assuring your guests that their stay will be a pleasurable and safe one.  Our ticking is antimicrobial, stain-resistant, water-resistant, durable, and easily cleaned.
 
Robust stain-fighting protection with antimicrobial properties that work to minimize the growth of mold, mildew, and a broad spectrum of odor-causing bacteria provide superior protection.  Your mattress stays cleaner and fresher longer for your guests while giving them comfort and the assurance of a protected stay. EPA-registered encapsulated silver ion technology is the cutting edge of sleep cleanliness assurance.

The comfort you have come to rely on from all our mattresses remains uncompromised. Because all the protections are seamlessly woven directly into the mattress fabric, there is no need for an uncomfortable cover.

Ideal for hotels, rentals, condos, beach houses, camps, RVs, Airbnbs, luxury suites, and homes throughout the world.
​The durability and comfort features of this mattress make it ideal for use in private and public facilities. The only choice for use in public facilities to meet disinfection and cleaning standards because WET BAN™ is engineered to reduce contamination while maintaining comfort. Able to meet all institutional sleep product requirements in any custom-designed mattress environment.

Mattresses with built-in Stain Repellent and Antimicrobial protection. WET BAN™ mattresses are engineered to help reduce contamination while maintaining comfort.

​Environmental Impact
• Does not contain PFOS (perfluoro octane sulfonate)  PFOA (perfluorooctanoic acid)
​• No Proposition 65 chemicals present
• No REACH listed chemicals (Substances of Very High Concern)
• No EPA-regulated Section 313 chemicals present
• Low VOCs (Volatile Organic Compounds)
• No formaldehyde, phthalates, heavy metals, bisphenol BPA, or dioxin
• No Halogenated Flame Retardants (i.e. PBDEs)
• PVC free

ANTIMICROBIAL • STAIN-RESISTANT • WATER-RESISTANT • DURABLE • EASILY CLEANED

Take Notice: regarding custom enclosures or custom builds for replacement mechanisms:
Screws or bolts for attachment are not included.

The mounting width is not the mattress size. Take away 8" from the mounting width for the correct mattress width.
Sleeper Mattress sizing differs from standard mattress sizes. Sleeper mattress sizes are:
Twin: 36 in. wide x 72 in. long
Full: 54 in. wide x 72 in. long
Queen: 60 in. wide x 72 in. long

When custom building, we encourage you to build around the unit once it's received. All measurements provided on the spec sheets are minimums.