UL 2781

Pool and Spa Water Treatment Products

2.1 This Standard includes the following:

a)    Oxidizers;

b)    Algaecides;

c)    Balancers;

d)    Enhancers; and

e)    Phosphate removers.

2.2 The scope of this Standard has been established to encompass water treatment products used to maintain above and below ground conventional residential pool and residential spas. Public (i.e. municipal, hotels, etc.) pools and spas are not covered in this Standard as they typically follow government and other best practices guidelines, and may also use non-chemical alternative technologies to treat water such as electric oxidation, salt chlorination, ozone and mineral sanitation systems.


  • Edition Number: 1
  • Edition Date: 10/12/2011
  • Price Code: A
  • Type: ule
  • ANSI Approved:
  • DOD Approved: