18
J-400
Decontamination Procedure
Steps 9-15 below are only required when sanitizer levels are unstable 
after performing Spa Fill Up Procedures steps 1-6. Disregard steps 9-15 
below if sanitizer levels remain stable after performing steps 1-6.
Note: The “Decontamination Procedure” should also be used after the 
spa has been “Winterized” (Sec. 13.8, page 66) or has been sitting 
without power for an extended period.
9.  Add 2.5 ounces (71 g) of sodium dichlor for every 100 gallons  
(378 L) of water. Refer to the table for approximate water ll volume.
CAUTION:  RISK OF PERSONAL INJURY OR SPA DAMAGE!
Never add chlorine tablets (trichlor) or acid to your hot tub 
for any reason! These chemicals may damage components 
within your hot tub, burn or irritate your skin, create a rash, 
and void the manufacturer warranty for your spa.
!
Water Fill Volume by Model
  Average   Sodium
Model  Fill Volume*  Dichlor
J-495................................560 Gal (2,120 L) ................................14.0 oz
J-485................................435 Gal (1,647 L) ................................ 11.0 oz
J-475................................440 Gal (1,666 L) ................................ 11.0 oz
J-445................................380 Gal (1,438 L) .................................9.5 oz
J-435................................360 Gal (1,363 L) .................................9.0 oz
J-425................................340 Gal (1,287 L) .................................9.0 oz
*Use average ll volume for chemical maintenance
10.  Leave spa cover open during this step to allow 
excessive chemical vapors to exit spa, protecting 
pillows and plastic knobs from chemical attack. If spa is 
indoors, open doors and windows for proper ventilation. 
Turn on all spa jet pumps for one hour, open all air 
controls, and place all massage selector knob(s) in their 
center “combo” position.
Note: You will need to activate the jet pumps every 20 minutes since 
these functions have an automatic 20 minute time-out that turns them off. 
WARNING: RISK OF PERSONAL INJURY!
•  To decrease the risk of injury, drowning or entrapment, 
never leave your hot tub unattended for any reason while 
the cover is open and accessible, especially to small 
children and animals!
•  Precautions should be taken to minimize your exposure 
to chemical vapors (that could cause lung, brain, or skin 
damage).
!
B C
A
Lighted control 
valve shown.