Muriatic acid on tile

[Bienes Raices]

If you use this stuff to clean grout in tile, is it safe to flush the remaining mop water down the house's drains, or will the muriatic acid damage the pipes? I just had the house repiped with PEX. Thanks.

[Ernie Vlla]

muriatic acid should never be used full strenght on toilets tubs floors or any finished surface it will etch you concrete on driveways or garage floors. we use it to prep for floor paint. 30 yrs back i used it on a tub let it soak in while i did other things around the home came back a few hrs later to find the porcelin etched from the tub .metal pipes yes it will eat them up pex piping we only use pex for supply lines so if your pumber told you he replaced all the lines at home thats another story