Buckman's 4011NSF 1 gal 12.5% Pool Shock - 4 per Case - Buckmans Inc is the region’s leading supplier of Sodium Hypochlorite, manufacturing, packaging and distributing Sodium Hypochlorite from one gallon containers all the way up to 4,800 gallon bulk deliveries. We deliver from Maine to Georgia and as far west as Michigan with industry-leading product and award-winning customer service. In the water purification and swimming pool industry, Sodium Hypochlorite offers powerful disinfection and oxidation properties.