Thursday, August 3, 2017

Are Drop-In Toilet Bowl Cleaner Tablets Safe?


Toilet bowl cleaner tablets that sit in the bottom of the tank have two advantages over the older type that hang on the side of the bowl: they are easy to install without having to touch the toilet bowl and not visible when in place. But, because they dispense a disinfectant chemical into the tank instead of the bowl, the flush mechanism is exposed to the chemicals, which often includes chlorine bleach.
 
Toilet manufacturers noticed an immediate surge in leakage complaints about their products after the drop-in tablets were introduced in the early  1990s. One of the problems the manufacturers discovered the new product was that if a homeowner left on vacation or, even worse, installed the tablets in a seasonal home, the concentration of the chemicals would intensify in the tank to corrosive levels as the tablet slowly dissolved without any toilet flushes to dilute it.
 
The Clorox Company responded to a class action suit claiming damage to toilet mechanisms, even though the manufacturer claimed that their Clorox Automatic Toilet Bowl Cleaner “does not damage toilets,” with an $8-million settlement. Clorox denied any wrongdoing but has since added the statement “tablets should be used in toilets that are flushed daily” to the product packaging. Unfortunately, it is not practical for a consumer to fish the tablet out of the bottom of the tank before leaving home for an extended period.

Toilet manufacturers responded to the problem by adding warning stickers, like the one shown below by Kohler, to the inside of their toilet tanks as a consumer warning.


Plumbers also recommend not using the tablets based on their experience replacing deteriorated plastic, metal and rubber flush mechanism parts—especially the flapper. The tablets have also been documented to cause tank leakage or an inadequate flush.


Van Hibberts, CMI

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