Step 7 - Filling A Mattress

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Aerator Removal
Remove the aerator by unscrewing it
from your bathroom faucet. If this faucet does not have an aerator, the kitchen faucet may also be used. The last choice would be an outside faucet because you want to put warm water into your waterbed mattress. A waterbed mattress heater may take two days to bring a cold mattress up to temperature. This could also strain the waterbed heater.

If the aerator is stubborn, wrap several layers of duct tape around it & use a pair of pliers to loosen the aerator.

Attach the faucet connector from your waterbed care kit or drain & fill kit to your faucet.

Firmly attach a hose to the faucet connector. Be sure this is a clean hose. Hoses that have been stored outside for a period of time, or that have dirt inside them may introduce enzymes, bacteria, or other contamination into your waterbed. Rinse these hoses for ten minutes by letting water run through the hose.

Mattress Attachment
Attach the waterbed hose attachment onto the hose. Remove the fill cap and seal from the mattress and screw the attachment into the fill hole. Be sure it is tight enough yet do not over tighten and strip the threads. A small towel might be handy to soak up any leakage from the filling process.

Fill the mattress with about 2" of luke-warm water.

Adjust everything one final time. Once the mattress is full of water it will be impossible to move so check everything carefully.

Dual Mattresses
A "Y-Connector", used to fill both mattresses equally at the same time is available at the store. Otherwise, it is recommended that you only fill 2" in one mattress before connecting to the second to fill 2". You'll have to switch back & forth, 2" at a time to ensure equality.

Pour in your waterbed conditioner. Fill the bed until it is 1/4" to 1/2" below the side of the frame boards. Shut off the water and remove the hose.

If you have Dual Mattresses split the conditioner between the two bladders.

Air Removal
Remove the air from inside the mattress. Use a broomstick or other rod, slide it from the head of the bed toward the fill hole. Remove all the bubbles to prevent noise from the mattress. A new mattress will periodically need to be "burped" to remove the air.

Install the seal and cap.

How Much is Enough?
How much water is enough? This depends on the style of mattress. The "1/4" to "1/2" below the rail was only an approximation. Adding or subtracting water can change the feel of the bed a great deal.

With fiber filled (or baffled) mattresses rated over 95% waveless, more water makes it appear softer and less water makes it appear firmer.

With a mattress of 90% or less waveless rating, the mattress should be filled to accommodate the largest sleeper for the bed. This is done by measuring with the body. Sit in the middle of the bed. Rock gently to the left and right. If your bottom only touches when you rock from side to side, it is filled the correct amount.

If your bottom is always touching, add water. If your bottom never touches, drain some water.

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