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According to the SDS, Javelin is hydrochloric acid (HCl); muriatic acid is also HCl.

The concentration of HCl in Javelin may be higher or lower that that which you get from the pool store.

Either way it will dissolve calcium and piss crystals. It will also dissolve copper dwv over time.
It's also got something in it that makes it cling to the fixture, like bowl cleaner. That property makes clearing the bowl rim much easier. The odor is better than muriatic as well. We charge accordingly for chemical cleaning fixtures so I don't mind the extra cost at $10/bottle.
 

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No thrift is a Sulfuric Acid blend different from Muratic acid they do different things
I thought Thrift was sodium hydroxide crystals? I'd have to check again. I never was much of a fan except in certain circumstances. The fumes are pretty potent and I knew a guy that got some gnarly burns on his arm from that stuff.
 

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I used to vacuum all the water out of the bowl only, then using a plastic transmission
funnel I would pour the acid though the funnel in the overflow to clear out the jets then fill the bowl to the normal level, then let it set for at least a hour, then flush a couple
of times to clear acid out,
#1 make sure to have a open window open or the vent fan running to fumes out
#2 before getting started be sure to remove any silver, toothbrush's, etc that might
not react good to the acid fumes !
 

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I went to a bar one night with a 3' long trough urinal that was stop up and full of water and piss, I did not have a trap snake, so I poured a Gallon of Muriatic Acid over where
the p trap was and then let it set in about a 1/2 hour it was draining fine,
I got a service call and $28.00 dollars for the acid 1977 PRICES
 

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When I was in the Air Force and we had a clogged urinal we would pour down a 5 gallon container of some type of acid that was used to clean cooling towers it really smelled strong and usually worked. The main problem with urinal stoppages back in the 80's in the Air force was scented soap cakes and cigarettes' buts.
FIRE PROTECTION 3E7X1 OCT 1974- MARCH 1975 AND
PLUMBING 55235 MARCH 1975- JULY 1976
CA. ANG. SEPT 1976-FEB 1981
 
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