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The Waterbed Doctor

*(Lower Contiguous 48 States)


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Land and Sky LogoNC 4000 Deep Fill Soft Side Replacement Waterbed Mattress (Bladder)
NC4000TWD - Alternative Replacement for Land and Sky NC4000 Soft-Side Water Chamber

The NC4000TWD is a replacement water bladder (mattress) for the New Century line of soft side waterbed mattresses. These are premium soft side waterbeds including the Serena, Spiritus, Dreamscape, Celeste, Legacy, Whisper, and Gallery Nightflight.

Land and Sky is no longer producing waterbed products. We are pleased that they have chosen The Waterbed Doctor as the Authorized Provider of Alternative Replacement Products.

Waveless Fiber Design - BioFirm XT Support Fiber
90% Wave Reduction

Specially formulated, 5-layer fiber support system provides semi-wavelessness and firm support to improve sleeping posture. Unique density and thickness resists packing down over time. The third layer of fiber folded in thirds for extra mid-body support. Added resiliency combines waveless performance with healthful support and lasting durability.

  • Patented Fiber-Net: Reduces abrasion and breakdown of Fiber Support System
  • Patented Triple Strength Corners: Premium, triple-laminated vinyl for durability and perfect frame fit.
  • Patented Permaflex Safety Bottom: Eliminates stress from the Temperature Control Unit for longer mattress life.
  • Patented AirJet+: Expels air bubbles while filling the mattress; equalizes pressure for faster and more complete draining.

The NC4000TWD Replacement Bladder for New Century Waterbed Mattresses is available in the following sizes (Choose One):

Foam Cavity Measurements (where water mattress lays)
Eastern King 65" Wide 69" Long 7" Deep
California King 61" Wide 73" Long 7" Deep
Queen 50" Wide 69" Long 7" Deep

It is recommended that you also add conditioner every year.


NC 4000 Replacement Chamber
NC 4000TWD Chamber - by The Waterbed Doctor
IN STOCK WATERBED DOCTOR BRAND COMPARABLE TO NC 4000 Chamber. This is a 5-Layer Fiber design with lumbar support

*Includes FAST FREE SHIPPING and Extended 20 Year Warranty.*

Size of Mattress:
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New Century - Symphony Safety Liner
Fitted Safety Liner for Land & Sky New Century Softside Waterbeds
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