for SOFTSIDE Waterbeds

Complete Softside Waterbed Mattress Kits

Refresh your softside waterbed system with our complete replacement kits. Designed to fit into foam support shoulders , each kit includes a high-grade softside water mattress, a heavy-duty flat safety liner, an energy-efficient heater, a bottle of waterbed conditioner, and an air extractor pump for an effortless setup.

Choose Your Motion Stability & Heater Setup

• Motion Stability Options: Choose your ideal comfort level, ranging from the ST1000 (full motion) up to the ST5500 (maximum wave-reduced stability).
• Heater System : Includes a reliable 215W Carbon Classic heater engineered for single-bladder softside setups.
• Twin (Dual) System Heaters: Includes two 200W Silvertec heaters for independent temperature adjustment across dual bladders.
• Heavy-Duty Safety Liner: Features a thick, durable flat safety liner built to protect your foam surrounds and bed base for years to come.

Frequently Asked Questions

What comes inside a softside waterbed mattress kit?
Each kit includes a replacement softside water mattress, a thick safety liner, a thermostatic heater (Carbon Classic or Silvertec for Twin), a 1-year bottle of conditioner, and an air extractor pump.

Which mattress stability level should I choose?
Select the ST1000 for traditional full flotation movement, or step up through our range to the ST5500 for maximum wave reduction that settles almost instantly.

Will these kits fit standard UK softside bed frames?
Yes. Our softside mattress kits are designed to sit inside standard UK foam-bordered waterbeds (Double, King, Queen and Super King and American King).