“Pressure-type sand filter” means a filter that uses sand or sand and gravel as the filtering medium, through which pool water is pumped under pressure.

Source. (See Revision Note #1 at chapter heading for Env-Wq 1100) #8468, eff 11-1-05; ss by #10577, eff 5-1-14 (See Revision Note #2 at chapter heading for Env-Wq 1100) ; ss by #13198, eff 5-1-21 (formerly Env-Wq 1102.41) (see Revision Note #3 at chapter heading for Env-Wq 1100)