09-26-2012 08:07 PM
I want to clean my flagstone patio of any film and small stains from grouting it recently. My worry is that the muriatic acid might somehow damage my plastic drain/corrugated piping. I've tried elbow grease and a stiff brush, it helped a little but leaves something to be desired. I just don't want to take any chances since I will be very dependant upon this drain working for years to come. Is there a risk of damaging the drain?
09-26-2012 08:13 PM
Muriatic acid is very strong and can do a lot of damage if not used properly.
It will "eat" concrete.
Try very diluted solution first. Than add small amounts, easyily, and see how it works for you.
I can't answer the " pipe" question for I have never seen it used in such matter.
Here, peoiple use it to clean up the driveways.
09-26-2012 08:16 PM
09-26-2012 08:18 PM
use white disstilled vinegar straight...
this would have been the week that I'd have finished chewing thru the restraints...
if only new layers hadn't been added....
09-27-2012 12:10 PM - edited 09-27-2012 12:12 PM
put a hose with running water at the drain opening, scrub with a diluted acid. the running water will further dilute the acid and keep it moving. also adds a barrier between the drain and acid. use enough water to completely flush the drain. do not use soap or detergent during the scrubbing.
THE MOST DANGEROUS TOOL IS THE ONE YOU ARE USING
09-27-2012 12:34 PM
Thanks, I'm going to try sticks suggestion of using white vinegar. Hopefully it works. I'll let ya'll know.
09-27-2012 02:15 PM
If you do use the acid, here's a method to neutralize for safe disposal:
A successful journey has two parts; facing the right direction, and taking the first step.
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10-04-2012 07:42 PM
After confirming that the corrugated pipe and plastic used to make the drainage box was hdpe, I cleaned the stone using a 10:1 dilution and a stiff scrub brush on a long handle. It worked well. I'll probably need to clean it one more time along some short retaining walls that I plan to brick soon.