Putting a Conventional Mattress in a Waterbed

With all of the mattresses that are being made, is there such thing as a Conventional Mattress that can be put in to a waterbed frame? As you will see in this blog there is finally a mattress for people who no longer want their waterbed mattress, but would like to keep their wooden water bed frame, and it can be found at waterbed stores and mattress stores. Putting a Conventional Mattress in a Waterbed is easy and saves you money. They are generally stocked and custom made to fit inside of a waterbed; the industry calls this mattress a water bed insert.

Putting a Conventional Mattress in a Waterbed

Shop our regular mattress made to fit a hardside waterbed frame now by clicking the photo above.

Available water bed insert mattress sizes:

·Shop Super Single Inserts- Measurements 46 inches wide x 82 inches long
·Shop California Queen- Measurements 58 inches wide x 82 inches long
·Shop California King- Measurements 70 inches wide x 82 inches long

10 Benefits of a waterbed insert mattress

1. You can keep your waterbed headboard, frame, drawers, sheets, mattress pad, and comforter.
2. Saves money only one thing to buy, a conventional coil spring mattress that is made to fit the waterbed.
3. Buying a replacement conventional mattress for the hard side waterbed means you can still use everything you already own for it.
4. Regular mattresses for a waterbed are easier to get in and out of.
5. Special waterbed conventional mattresses are easy to move.
6. No waterbed heater expenses to pay for.
7. Waterbed inserts come in a variety of firmnesses including Firm, Medium, and Pillow Top Soft, memory foam, and all natural latex
8. Conventional water bed inserts are cheaper than buying a new set of mattresses.
9. Do not have to drain and fill when moving the waterbed.
10. Don’t have to worry about leaks.

Bonus Benefit

11. Waterbed Inserts are lightweight.

Can’t find a store that carries waterbed inserts. Shop our entire Waterbed Insert Collection by clicking now or Call 1 888 785 2337


Doug Belleville and his father Dave own and run STLBeds - a specialty sleep store located in Arnold, MO. The staff at STLBeds is highly educated about sleep, comfort and their special sleep products. STLBeds only carries high quality mattresses and bed-related products. You won't find the brand names here - just call and ask us why!

20 Comments Leave your comment »

I live in Cleveland OH., and cannot find any waterbed inserts.I’ve had my waterbed 23 years and think it’s time for a mattress, but don’t want a new bed. Can you refer me to a store around here tha has w.b. inserts? Thanks, Bret.

Comment by Bret — July 10, 2009 @ 10:42 pm

Hi Bret, I am sorry I am unfamiliar with the Cleveland Ohio area. You may be able to either Google the terms waterbed insert or water bed insert. A couple of other names you can try would be waterbed replacement mattress or innerspring insert and the various waterbed spellings along with the words Cleveland Ohio.

With that said we are able to ship our line of waterbed inserts into your area. Please feel free to contact STLBeds for pricing at 636-296-8540.

Comment by Doug — July 14, 2009 @ 1:03 pm

We have a King waterbed insert. We will be downsizing to an apartment soon and the waterbed frame is not worth moving, but the mattress is still in decent shape. Will the insert fit into a conventional bed? What would you suggest to replace the bedframe?

Thank you

Comment by Claudia — August 31, 2009 @ 8:30 am

Hi Claudia,
You will need to take note of the measurements of your waterbed insert. The new box foundation or boxspring that you would be purchasing should be the same size as your waterbed insert in order to support it properly. You will then need a steel bed frame that has adjustable clamps and will support your the new and odd sized boxspring. Not a big deal a little hard to find sometimes. Other options are to sell the whole thing on Craigs List or build a supporting platform to support the insert mattress.

Comment by Doug — August 31, 2009 @ 5:56 pm

What is the price for mattress inserts for waterbed. I have a King size. Do I need mattress & Boxspring? Where will the top of the mattress hit in comparison to top of rail. Do you have a price list.

Comment by Paula Conklin — April 7, 2010 @ 5:22 am

Hi Paula,
The website was not set up as a shopping cart so it is very complex to include pricing and change them as prices change with the type of site we have. We will be upgrading soon.

You do not need a box spring.
The height will depend on the particular mattress you choose since mattress thickness varies from model to model.
Please feel free to call us toll free 1-888-785-2337

Comment by Doug Belleville — April 9, 2010 @ 12:13 pm

I need to find a waterbed insert for a california king waterbed frame ASAP. We are in the Pittsburgh PA area. Would you please email me an estimated price for this size insert delivered to zip code area 15143.
Thank you very much.

Comment by Gail Pinak — June 14, 2010 @ 10:07 am

Hi Gail,
We have many different waterbed insert options. These options include various firmness levels, types, and prices. Depending on the model there may be possible shipping costs as well. It would be best for you to call when you have a moment toll free at 1-888-785-2337
I would be glad to help you narrow it down and hit a price that will meet your budget.
Thank you for contacting us.
Doug Belleville

Comment by Doug Belleville — June 14, 2010 @ 6:36 pm

we have a supersingle water bed frame and we have a fullsize mattress we would like to put the mattress in the watrer bed from for our 3 year will it work please call me becouse our email is not working xxx-xxx-xxxx thanks so much for this

Comment by lashonda — January 2, 2011 @ 6:53 pm

It will not. The super single waterbed inside should measure 48 x 84 and your full size mattress measures 54 x 84. They do make a coil spring mattress called a waterbed insert that will work. It measures 46 x 84. You can also use the waterbed headboard behind the full size mattress if you were to add legs to it. These can be build from the old waterbed frame. Lastly you can put a waterbed mattress into the frame starting well under $100.00 dollars.

Comment by Doug Belleville — January 2, 2011 @ 7:34 pm

Just got a waterbed insert I believe it is a king size cause it is huge but will use it with a space saver base but I was wondering what size bedding to buy king or cal king?

Comment by CJ — August 22, 2012 @ 9:51 am

If you have a waterbed insert it should be a 70 x 82 Cal. King. California King sheets will work they will be a little sloppy. Some people use oversized king flat sheets and tuck them in. You can also try your old waterbed sheets. Depending on their cut they still may work. There really isn’t a sheet made special for inserts.

Comment by Douglas Belleville — August 23, 2012 @ 9:13 pm

We just sold our king size waterbed frame to some people and they called and complained that it is not a king size. When bought it, the paperwork said king size and when we got the mattress to go inside it, we never took dimensions we just told them a king size and it fit. Is there a big size difference between a replacement mattress and a regular mattress?

Comment by Noble — November 19, 2012 @ 7:32 am

A wood frame waterbed measures inside 72 x 84. A regular king measures 76 x 80. As you can see there is a definitive difference. If your paperwork called it a king the sales associate should have wrote down California King. An intentional error that was made on a pretty regular basis because lazy sales were people trying to save time and speed up the paperwork process by choosing to leave off the word California. Replacement mattresses are a better fit because they are slightly undercut. 70 x 82.

Comment by Douglas Belleville — November 19, 2012 @ 7:55 am

Install new mattress in Cal.King waterbed hard frame. Finding very warm to sleep on. Should I cut holes in the bottom panels to allow for more air circulation.

Comment by Paul Neil — August 26, 2013 @ 3:54 pm

Paul, if it is a conventional mattress made for a waterbed frame it would seem to me that that too into account it would be placed on plywood or OSB platform. This is something you think would be considered in the beds design. It can’t hurt anything. Perhaps more breathable bed linens could be a help as well.

Comment by Douglas Belleville — August 28, 2013 @ 8:05 pm

I’m looking to replace my soft sided waterbed with water tubes (baffled) … With the new conventional mattress. But looking at sizes I’m very confused. I think you did answer this about they are undercut. Because the mattress measurements are 72 x 80.

The frame for my waterbed supports the headboard which has glass curios on either side. I believe that my ex had shortened the length by moving in the headboard a little approximately 1 1/2 inches because my inside measurements, cavity, to hold the mattress is 72 x 85.5.

So purchasing a standard , aka conventional, California king mattress will fit and will come in at 70 x 82? By the way I’ve never had a problem with conventional king-size sheets getting my bed.

Any advice would be sincerely appreciated!

Comment by Helen — December 1, 2014 @ 3:08 pm

Please contact me by email and maybe we can exchange numbers and discuss my slight dilemma!

Comment by Helen — December 1, 2014 @ 3:10 pm

Helen, Our toll free number is at the top of this page, please feel free to call at your convenience. Look forward to helping you through your dilemma. Doug

Comment by Douglas Belleville — December 1, 2014 @ 7:30 pm

Helen, We offer tube type waterbeds, conventional mattresses called waterbed inserts, and we do lots of things that could be very helpful in making a change or keeping some things while eliminating others. This really needs to be a conversation or both our fingers are going to hurt. ;-) Doug

Comment by Douglas Belleville — December 1, 2014 @ 7:35 pm

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