Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Type_Male Fixed Union Tee If replacing the backwash ball

If replacing the backwash ball (Part #1030502)

This automated maintenance process eliminates manual flushing routines while maximizing system efficiency and membrane service life

and swimming pools

It is not interchangeable with the 2850S valve series

Hanna (HI701-25) Free-Chlorine Refill for the Hanna HI701 Checker Handheld Colorimeter (Pack of 25) Type_Male Fixed Union Tee If replacing the backwash ballHanna Instruments Reagent Refill Hanna HI701 25 Free Chlorine Reagent Pack Twenty five replacement reagents for the HI701 Checker colorimeter. Accurate free chlorine testing from 0. 00 to 2. 50 mg L without guessing at color charts. 25 Tests Per Pack 0. 01 mg L Resolution DPD Method WHY IT WORKS Consistent chemistry for reliable chlorine measurement DPD Reagent Method Uses the EPA approved DPD (N,N diethyl p phenylenediamine) method for free chlorine